./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_with_lookup_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_with_lookup_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 01ad56e04b6ab93ff162b70d622a1dbeae0350a0f6dc141a393bf37a9fe53f01 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:20:58,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:20:58,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:20:58,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:20:58,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:20:58,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:20:58,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:20:58,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:20:58,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:20:58,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:20:58,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:20:58,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:20:58,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:20:58,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:20:58,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:20:58,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:20:58,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:20:58,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:20:58,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:20:58,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:20:58,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:20:58,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:20:58,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:20:58,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:20:58,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:20:58,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:20:58,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:20:58,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:20:58,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:20:58,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:20:58,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:20:58,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:20:58,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:20:58,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:20:58,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:20:58,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:20:58,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:20:58,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:20:58,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:20:58,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:20:58,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:20:58,083 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-07 01:20:58,106 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:20:58,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:20:58,107 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:20:58,107 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:20:58,108 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:20:58,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:20:58,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:20:58,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:20:58,109 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:20:58,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:20:58,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:20:58,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:20:58,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:20:58,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:20:58,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:20:58,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:20:58,111 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:20:58,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:20:58,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:20:58,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:20:58,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:20:58,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:20:58,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:20:58,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:20:58,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:20:58,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:20:58,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:20:58,117 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:20:58,117 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:20:58,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:20:58,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:20:58,118 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_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01ad56e04b6ab93ff162b70d622a1dbeae0350a0f6dc141a393bf37a9fe53f01 [2021-12-07 01:20:58,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:20:58,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:20:58,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:20:58,308 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:20:58,308 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:20:58,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_with_lookup_harness.i [2021-12-07 01:20:58,352 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/data/f2fca8cd5/aa28925605074bb2addd219201285a75/FLAG685aea40c [2021-12-07 01:20:58,970 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:20:58,971 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_with_lookup_harness.i [2021-12-07 01:20:58,998 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/data/f2fca8cd5/aa28925605074bb2addd219201285a75/FLAG685aea40c [2021-12-07 01:20:59,385 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/data/f2fca8cd5/aa28925605074bb2addd219201285a75 [2021-12-07 01:20:59,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:20:59,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:20:59,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:20:59,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:20:59,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:20:59,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:20:59" (1/1) ... [2021-12-07 01:20:59,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f62bfa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:20:59, skipping insertion in model container [2021-12-07 01:20:59,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:20:59" (1/1) ... [2021-12-07 01:20:59,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:20:59,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:20:59,691 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_with_lookup_harness.i[4505,4518] [2021-12-07 01:20:59,696 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_with_lookup_harness.i[4565,4578] [2021-12-07 01:21:00,371 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,371 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,372 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,372 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,373 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,382 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,383 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,384 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,385 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,672 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 01:21:00,673 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 01:21:00,673 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 01:21:00,674 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 01:21:00,675 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 01:21:00,676 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 01:21:00,676 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 01:21:00,677 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 01:21:00,677 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 01:21:00,678 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 01:21:00,801 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 01:21:00,817 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,817 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,866 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,866 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:21:00,955 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:21:00,964 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_with_lookup_harness.i[4505,4518] [2021-12-07 01:21:00,965 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_with_lookup_harness.i[4565,4578] [2021-12-07 01:21:00,989 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,990 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,990 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,990 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,991 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,995 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,995 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,996 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:00,996 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:01,017 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 01:21:01,017 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 01:21:01,018 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 01:21:01,018 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 01:21:01,019 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 01:21:01,019 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 01:21:01,019 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 01:21:01,020 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 01:21:01,020 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 01:21:01,020 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 01:21:01,033 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 01:21:01,042 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:01,043 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:01,085 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:01,086 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:21:01,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:21:01,278 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:21:01,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:01 WrapperNode [2021-12-07 01:21:01,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:21:01,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:21:01,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:21:01,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:21:01,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:01" (1/1) ... [2021-12-07 01:21:01,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:01" (1/1) ... [2021-12-07 01:21:01,426 INFO L137 Inliner]: procedures = 691, calls = 2646, calls flagged for inlining = 63, calls inlined = 10, statements flattened = 959 [2021-12-07 01:21:01,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:21:01,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:21:01,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:21:01,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:21:01,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:01" (1/1) ... [2021-12-07 01:21:01,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:01" (1/1) ... [2021-12-07 01:21:01,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:01" (1/1) ... [2021-12-07 01:21:01,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:01" (1/1) ... [2021-12-07 01:21:01,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:01" (1/1) ... [2021-12-07 01:21:01,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:01" (1/1) ... [2021-12-07 01:21:01,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:01" (1/1) ... [2021-12-07 01:21:01,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:21:01,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:21:01,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:21:01,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:21:01,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:01" (1/1) ... [2021-12-07 01:21:01,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:21:01,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:01,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:21:01,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:21:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-07 01:21:01,577 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-07 01:21:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-07 01:21:01,578 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-07 01:21:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:21:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-07 01:21:01,578 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-07 01:21:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 01:21:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-07 01:21:01,578 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-07 01:21:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 01:21:01,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 01:21:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:21:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:21:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:21:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:21:01,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:21:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-07 01:21:01,579 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-07 01:21:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 01:21:01,579 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 01:21:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:21:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-12-07 01:21:01,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-12-07 01:21:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:21:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:21:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-07 01:21:01,580 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-07 01:21:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-12-07 01:21:01,580 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-12-07 01:21:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure assert_bytes_match [2021-12-07 01:21:01,580 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_bytes_match [2021-12-07 01:21:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-07 01:21:01,581 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-07 01:21:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 01:21:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:21:01,767 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:21:01,768 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:21:02,734 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:21:02,741 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:21:02,741 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 01:21:02,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:21:02 BoogieIcfgContainer [2021-12-07 01:21:02,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:21:02,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:21:02,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:21:02,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:21:02,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:20:59" (1/3) ... [2021-12-07 01:21:02,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11111c67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:21:02, skipping insertion in model container [2021-12-07 01:21:02,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:01" (2/3) ... [2021-12-07 01:21:02,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11111c67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:21:02, skipping insertion in model container [2021-12-07 01:21:02,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:21:02" (3/3) ... [2021-12-07 01:21:02,748 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_append_with_lookup_harness.i [2021-12-07 01:21:02,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:21:02,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:21:02,787 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:21:02,792 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 01:21:02,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:21:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 107 states have internal predecessors, (130), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-07 01:21:02,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-07 01:21:02,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:02,817 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:02,818 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:21:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:02,821 INFO L85 PathProgramCache]: Analyzing trace with hash -515135338, now seen corresponding path program 1 times [2021-12-07 01:21:02,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:02,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24047178] [2021-12-07 01:21:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:02,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:21:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:21:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:21:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:21:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:21:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-07 01:21:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 01:21:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:21:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:21:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:21:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:21:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-07 01:21:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-07 01:21:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-07 01:21:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-07 01:21:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-07 01:21:03,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:03,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24047178] [2021-12-07 01:21:03,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24047178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:03,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:03,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:21:03,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357592214] [2021-12-07 01:21:03,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:03,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:21:03,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:03,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:21:03,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:03,400 INFO L87 Difference]: Start difference. First operand has 164 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 107 states have internal predecessors, (130), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-07 01:21:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:03,607 INFO L93 Difference]: Finished difference Result 324 states and 457 transitions. [2021-12-07 01:21:03,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:21:03,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 106 [2021-12-07 01:21:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:03,620 INFO L225 Difference]: With dead ends: 324 [2021-12-07 01:21:03,620 INFO L226 Difference]: Without dead ends: 159 [2021-12-07 01:21:03,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:03,630 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 66 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:03,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 265 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:21:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-07 01:21:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-12-07 01:21:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 102 states have (on average 1.2058823529411764) internal successors, (123), 103 states have internal predecessors, (123), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2021-12-07 01:21:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2021-12-07 01:21:03,675 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 106 [2021-12-07 01:21:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:03,676 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2021-12-07 01:21:03,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-07 01:21:03,676 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2021-12-07 01:21:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-07 01:21:03,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:03,680 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:03,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:21:03,680 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:21:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:03,681 INFO L85 PathProgramCache]: Analyzing trace with hash 828607714, now seen corresponding path program 1 times [2021-12-07 01:21:03,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:03,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941006436] [2021-12-07 01:21:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:03,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:21:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:21:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:21:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:21:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:21:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-07 01:21:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 01:21:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:21:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:21:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:21:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:21:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-07 01:21:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-07 01:21:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-07 01:21:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-07 01:21:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-07 01:21:03,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:03,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941006436] [2021-12-07 01:21:03,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941006436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:03,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797672278] [2021-12-07 01:21:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:03,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:03,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:03,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:21:03,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:21:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:04,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 2651 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:21:04,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-07 01:21:04,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:21:04,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797672278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:04,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:21:04,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-07 01:21:04,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872043591] [2021-12-07 01:21:04,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:04,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:21:04,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:04,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:21:04,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:21:04,578 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-07 01:21:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:04,726 INFO L93 Difference]: Finished difference Result 304 states and 405 transitions. [2021-12-07 01:21:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:21:04,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 106 [2021-12-07 01:21:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:04,729 INFO L225 Difference]: With dead ends: 304 [2021-12-07 01:21:04,729 INFO L226 Difference]: Without dead ends: 162 [2021-12-07 01:21:04,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:21:04,731 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 235 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:04,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 437 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:21:04,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-07 01:21:04,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-07 01:21:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 106 states have internal predecessors, (125), 44 states have call successors, (44), 12 states have call predecessors, (44), 13 states have return successors, (46), 43 states have call predecessors, (46), 43 states have call successors, (46) [2021-12-07 01:21:04,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 215 transitions. [2021-12-07 01:21:04,749 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 215 transitions. Word has length 106 [2021-12-07 01:21:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:04,750 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 215 transitions. [2021-12-07 01:21:04,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-07 01:21:04,750 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 215 transitions. [2021-12-07 01:21:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-07 01:21:04,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:04,753 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:04,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:21:04,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:04,955 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:21:04,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:04,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2123314487, now seen corresponding path program 1 times [2021-12-07 01:21:04,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:04,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263691011] [2021-12-07 01:21:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:04,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:21:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:21:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:21:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:21:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:21:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 01:21:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:21:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:21:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:21:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:21:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-07 01:21:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-07 01:21:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-07 01:21:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 01:21:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-07 01:21:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-07 01:21:05,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:05,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263691011] [2021-12-07 01:21:05,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263691011] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:05,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467662210] [2021-12-07 01:21:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:05,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:05,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:05,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:21:05,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:21:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:05,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 2668 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:21:05,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 79 proven. 15 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-07 01:21:05,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-07 01:21:05,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467662210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:21:05,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:21:05,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-07 01:21:05,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923143433] [2021-12-07 01:21:05,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:05,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:21:05,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:05,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:21:05,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:21:05,954 INFO L87 Difference]: Start difference. First operand 162 states and 215 transitions. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 11 states have internal predecessors, (111), 7 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (40), 7 states have call predecessors, (40), 7 states have call successors, (40) [2021-12-07 01:21:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:06,319 INFO L93 Difference]: Finished difference Result 290 states and 390 transitions. [2021-12-07 01:21:06,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:06,320 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 11 states have internal predecessors, (111), 7 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (40), 7 states have call predecessors, (40), 7 states have call successors, (40) Word has length 112 [2021-12-07 01:21:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:06,323 INFO L225 Difference]: With dead ends: 290 [2021-12-07 01:21:06,323 INFO L226 Difference]: Without dead ends: 165 [2021-12-07 01:21:06,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:21:06,325 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 348 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:06,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 610 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:21:06,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-07 01:21:06,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-12-07 01:21:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 109 states have internal predecessors, (127), 44 states have call successors, (44), 12 states have call predecessors, (44), 14 states have return successors, (49), 43 states have call predecessors, (49), 43 states have call successors, (49) [2021-12-07 01:21:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 220 transitions. [2021-12-07 01:21:06,352 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 220 transitions. Word has length 112 [2021-12-07 01:21:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:06,352 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 220 transitions. [2021-12-07 01:21:06,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 11 states have internal predecessors, (111), 7 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (40), 7 states have call predecessors, (40), 7 states have call successors, (40) [2021-12-07 01:21:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 220 transitions. [2021-12-07 01:21:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-07 01:21:06,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:06,355 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:06,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:21:06,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:06,557 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:21:06,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:06,559 INFO L85 PathProgramCache]: Analyzing trace with hash 512305682, now seen corresponding path program 1 times [2021-12-07 01:21:06,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:06,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450652812] [2021-12-07 01:21:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:06,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:21:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:21:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:21:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:21:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:21:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 01:21:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:21:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:21:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:21:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:21:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:21:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:21:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:21:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:21:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-07 01:21:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-07 01:21:06,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:06,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450652812] [2021-12-07 01:21:06,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450652812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:06,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65338102] [2021-12-07 01:21:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:06,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:06,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:06,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:21:06,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:21:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 2673 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 01:21:07,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-07 01:21:07,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:21:07,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65338102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:07,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:21:07,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-07 01:21:07,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481711537] [2021-12-07 01:21:07,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:07,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:21:07,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:07,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:21:07,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:21:07,303 INFO L87 Difference]: Start difference. First operand 165 states and 220 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-07 01:21:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:07,437 INFO L93 Difference]: Finished difference Result 290 states and 387 transitions. [2021-12-07 01:21:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:07,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 114 [2021-12-07 01:21:07,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:07,439 INFO L225 Difference]: With dead ends: 290 [2021-12-07 01:21:07,439 INFO L226 Difference]: Without dead ends: 162 [2021-12-07 01:21:07,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:21:07,441 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 258 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:07,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 568 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:21:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-07 01:21:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-07 01:21:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 106 states have internal predecessors, (124), 44 states have call successors, (44), 12 states have call predecessors, (44), 13 states have return successors, (46), 43 states have call predecessors, (46), 43 states have call successors, (46) [2021-12-07 01:21:07,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 214 transitions. [2021-12-07 01:21:07,453 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 214 transitions. Word has length 114 [2021-12-07 01:21:07,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:07,453 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 214 transitions. [2021-12-07 01:21:07,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-07 01:21:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 214 transitions. [2021-12-07 01:21:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 01:21:07,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:07,455 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:07,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:21:07,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:07,657 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:21:07,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:07,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1736862222, now seen corresponding path program 1 times [2021-12-07 01:21:07,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:07,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089099459] [2021-12-07 01:21:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:07,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:21:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:21:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:21:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:21:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:21:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 01:21:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:21:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:21:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:21:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:21:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:21:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:21:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:21:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:21:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-07 01:21:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-07 01:21:07,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:07,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089099459] [2021-12-07 01:21:07,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089099459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:07,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:07,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 01:21:07,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025091493] [2021-12-07 01:21:07,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:07,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:21:07,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:07,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:21:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:21:07,995 INFO L87 Difference]: Start difference. First operand 162 states and 214 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-07 01:21:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:08,261 INFO L93 Difference]: Finished difference Result 281 states and 370 transitions. [2021-12-07 01:21:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 126 [2021-12-07 01:21:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:08,263 INFO L225 Difference]: With dead ends: 281 [2021-12-07 01:21:08,263 INFO L226 Difference]: Without dead ends: 159 [2021-12-07 01:21:08,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:21:08,264 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 142 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:08,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 640 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:21:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-07 01:21:08,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-12-07 01:21:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 103 states have internal predecessors, (121), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2021-12-07 01:21:08,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 208 transitions. [2021-12-07 01:21:08,275 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 208 transitions. Word has length 126 [2021-12-07 01:21:08,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:08,275 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 208 transitions. [2021-12-07 01:21:08,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-07 01:21:08,275 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 208 transitions. [2021-12-07 01:21:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-07 01:21:08,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:08,277 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:08,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 01:21:08,277 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:21:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:08,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2638131, now seen corresponding path program 1 times [2021-12-07 01:21:08,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:08,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332510320] [2021-12-07 01:21:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:08,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:21:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:21:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:21:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:21:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:21:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 01:21:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:21:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:21:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:21:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:21:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:21:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:21:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:21:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:21:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-07 01:21:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-07 01:21:08,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:08,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332510320] [2021-12-07 01:21:08,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332510320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:08,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:08,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-07 01:21:08,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898946985] [2021-12-07 01:21:08,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:08,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:21:08,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:08,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:21:08,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:21:08,602 INFO L87 Difference]: Start difference. First operand 159 states and 208 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-07 01:21:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:08,927 INFO L93 Difference]: Finished difference Result 171 states and 224 transitions. [2021-12-07 01:21:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:21:08,928 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 128 [2021-12-07 01:21:08,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:08,930 INFO L225 Difference]: With dead ends: 171 [2021-12-07 01:21:08,930 INFO L226 Difference]: Without dead ends: 169 [2021-12-07 01:21:08,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:21:08,931 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 87 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:08,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1073 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:21:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-07 01:21:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-12-07 01:21:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 110 states have internal predecessors, (127), 45 states have call successors, (45), 13 states have call predecessors, (45), 14 states have return successors, (49), 44 states have call predecessors, (49), 44 states have call successors, (49) [2021-12-07 01:21:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 221 transitions. [2021-12-07 01:21:08,946 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 221 transitions. Word has length 128 [2021-12-07 01:21:08,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:08,946 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 221 transitions. [2021-12-07 01:21:08,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-07 01:21:08,947 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 221 transitions. [2021-12-07 01:21:08,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-07 01:21:08,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:08,949 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:08,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 01:21:08,949 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:21:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:08,949 INFO L85 PathProgramCache]: Analyzing trace with hash -822618705, now seen corresponding path program 1 times [2021-12-07 01:21:08,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:08,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151114683] [2021-12-07 01:21:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:08,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:21:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:21:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:21:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:21:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:21:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 01:21:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:21:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:21:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:21:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:21:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:21:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:21:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:21:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:21:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-07 01:21:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-07 01:21:09,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:09,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151114683] [2021-12-07 01:21:09,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151114683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:09,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:09,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 01:21:09,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807525946] [2021-12-07 01:21:09,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:09,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:21:09,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:09,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:21:09,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:21:09,206 INFO L87 Difference]: Start difference. First operand 168 states and 221 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-07 01:21:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:09,483 INFO L93 Difference]: Finished difference Result 252 states and 326 transitions. [2021-12-07 01:21:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 133 [2021-12-07 01:21:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:09,485 INFO L225 Difference]: With dead ends: 252 [2021-12-07 01:21:09,485 INFO L226 Difference]: Without dead ends: 173 [2021-12-07 01:21:09,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:21:09,486 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 127 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:09,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 636 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:21:09,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-07 01:21:09,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-07 01:21:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 114 states have internal predecessors, (131), 45 states have call successors, (45), 13 states have call predecessors, (45), 15 states have return successors, (50), 45 states have call predecessors, (50), 44 states have call successors, (50) [2021-12-07 01:21:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 226 transitions. [2021-12-07 01:21:09,501 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 226 transitions. Word has length 133 [2021-12-07 01:21:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:09,501 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 226 transitions. [2021-12-07 01:21:09,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-07 01:21:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 226 transitions. [2021-12-07 01:21:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-07 01:21:09,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:09,503 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:09,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 01:21:09,503 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:21:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:09,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1157852779, now seen corresponding path program 1 times [2021-12-07 01:21:09,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:09,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611432413] [2021-12-07 01:21:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:09,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:21:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:21:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:21:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:21:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:21:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 01:21:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:21:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:21:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:21:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:21:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:21:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:21:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:21:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:21:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-07 01:21:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-07 01:21:09,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:09,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611432413] [2021-12-07 01:21:09,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611432413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:09,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:09,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:21:09,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635252519] [2021-12-07 01:21:09,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:09,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:21:09,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:09,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:21:09,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:21:09,874 INFO L87 Difference]: Start difference. First operand 173 states and 226 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-07 01:21:10,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:10,182 INFO L93 Difference]: Finished difference Result 354 states and 474 transitions. [2021-12-07 01:21:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:10,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 132 [2021-12-07 01:21:10,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:10,184 INFO L225 Difference]: With dead ends: 354 [2021-12-07 01:21:10,184 INFO L226 Difference]: Without dead ends: 198 [2021-12-07 01:21:10,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:21:10,185 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 145 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:10,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 502 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:21:10,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-07 01:21:10,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 178. [2021-12-07 01:21:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 119 states have internal predecessors, (138), 45 states have call successors, (45), 13 states have call predecessors, (45), 15 states have return successors, (50), 45 states have call predecessors, (50), 44 states have call successors, (50) [2021-12-07 01:21:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 233 transitions. [2021-12-07 01:21:10,196 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 233 transitions. Word has length 132 [2021-12-07 01:21:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:10,196 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 233 transitions. [2021-12-07 01:21:10,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-07 01:21:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 233 transitions. [2021-12-07 01:21:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-07 01:21:10,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:10,198 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:10,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 01:21:10,198 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:21:10,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:10,198 INFO L85 PathProgramCache]: Analyzing trace with hash -899687341, now seen corresponding path program 1 times [2021-12-07 01:21:10,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:10,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228818919] [2021-12-07 01:21:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:10,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:21:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:21:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:21:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:21:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:21:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 01:21:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:21:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:21:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:21:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:21:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:21:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:21:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:21:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:21:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-07 01:21:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-07 01:21:10,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:10,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228818919] [2021-12-07 01:21:10,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228818919] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:10,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301436644] [2021-12-07 01:21:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:10,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:10,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:10,562 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:21:10,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:21:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:10,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 01:21:10,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:10,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:21:11,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-07 01:21:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 01:21:11,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-07 01:21:11,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301436644] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:21:11,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:21:11,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 16 [2021-12-07 01:21:11,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828935867] [2021-12-07 01:21:11,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:11,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 01:21:11,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:11,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 01:21:11,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:21:11,861 INFO L87 Difference]: Start difference. First operand 178 states and 233 transitions. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 13 states have internal predecessors, (105), 8 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-12-07 01:21:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:13,448 INFO L93 Difference]: Finished difference Result 500 states and 695 transitions. [2021-12-07 01:21:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-07 01:21:13,449 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 13 states have internal predecessors, (105), 8 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 132 [2021-12-07 01:21:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:13,452 INFO L225 Difference]: With dead ends: 500 [2021-12-07 01:21:13,452 INFO L226 Difference]: Without dead ends: 365 [2021-12-07 01:21:13,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 276 SyntacticMatches, 15 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 01:21:13,454 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 187 mSDsluCounter, 1990 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:13,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 2309 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2085 Invalid, 0 Unknown, 405 Unchecked, 1.2s Time] [2021-12-07 01:21:13,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-07 01:21:13,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 228. [2021-12-07 01:21:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 153 states have (on average 1.1764705882352942) internal successors, (180), 154 states have internal predecessors, (180), 55 states have call successors, (55), 17 states have call predecessors, (55), 19 states have return successors, (67), 56 states have call predecessors, (67), 54 states have call successors, (67) [2021-12-07 01:21:13,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 302 transitions. [2021-12-07 01:21:13,477 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 302 transitions. Word has length 132 [2021-12-07 01:21:13,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:13,478 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 302 transitions. [2021-12-07 01:21:13,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 13 states have internal predecessors, (105), 8 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-12-07 01:21:13,478 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 302 transitions. [2021-12-07 01:21:13,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-07 01:21:13,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:13,479 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:13,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-07 01:21:13,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:13,681 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:21:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash 461444876, now seen corresponding path program 1 times [2021-12-07 01:21:13,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:13,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937760613] [2021-12-07 01:21:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:13,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:21:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:21:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:21:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:21:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:21:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 01:21:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:21:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:21:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:21:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:21:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:21:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:21:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:21:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:21:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-07 01:21:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:21:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-07 01:21:13,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:13,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937760613] [2021-12-07 01:21:13,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937760613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:13,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:13,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 01:21:13,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787895130] [2021-12-07 01:21:13,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:13,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:21:13,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:13,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:21:13,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:21:13,944 INFO L87 Difference]: Start difference. First operand 228 states and 302 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-07 01:21:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:14,293 INFO L93 Difference]: Finished difference Result 329 states and 434 transitions. [2021-12-07 01:21:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:14,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 139 [2021-12-07 01:21:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:14,295 INFO L225 Difference]: With dead ends: 329 [2021-12-07 01:21:14,295 INFO L226 Difference]: Without dead ends: 247 [2021-12-07 01:21:14,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:21:14,296 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 78 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:14,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 595 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:21:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-07 01:21:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 230. [2021-12-07 01:21:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 156 states have internal predecessors, (182), 55 states have call successors, (55), 17 states have call predecessors, (55), 19 states have return successors, (67), 56 states have call predecessors, (67), 54 states have call successors, (67) [2021-12-07 01:21:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 304 transitions. [2021-12-07 01:21:14,309 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 304 transitions. Word has length 139 [2021-12-07 01:21:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:14,309 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 304 transitions. [2021-12-07 01:21:14,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-07 01:21:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 304 transitions. [2021-12-07 01:21:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-07 01:21:14,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:14,311 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:14,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-07 01:21:14,311 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:21:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:14,311 INFO L85 PathProgramCache]: Analyzing trace with hash 250358640, now seen corresponding path program 1 times [2021-12-07 01:21:14,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:14,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679182715] [2021-12-07 01:21:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:14,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:21:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:21:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:21:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:21:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:21:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 01:21:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:21:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:21:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:21:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:21:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:21:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:21:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:21:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:21:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-07 01:21:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:21:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:21:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-07 01:21:15,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:15,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679182715] [2021-12-07 01:21:15,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679182715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:15,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962569721] [2021-12-07 01:21:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:15,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:15,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:15,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:21:15,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:21:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:15,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 2835 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-07 01:21:15,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:15,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:21:15,782 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:21:15,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:21:15,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-07 01:21:16,226 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-12-07 01:21:16,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 28 [2021-12-07 01:21:17,238 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_19| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_19|) 8))) (and (not (= .cse0 0)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_1| 8)) .cse0)))) is different from true [2021-12-07 01:21:18,332 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_20| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_20|) 8))) (and (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_2| 8))) (not (= .cse0 0))))) is different from true [2021-12-07 01:21:18,414 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 01:21:18,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2021-12-07 01:21:19,432 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_21| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_3| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_21|) 8))) (and (not (= .cse0 0)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_3| 8)) .cse0)))) is different from true [2021-12-07 01:21:20,517 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_4| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_22|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_4| 8)) .cse0) (not (= .cse0 0))))) is different from true [2021-12-07 01:21:21,604 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.base_BEFORE_CALL_2| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.base_BEFORE_CALL_2|) 8))) (and (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_5| 8))) (not (= .cse0 0))))) is different from true [2021-12-07 01:21:22,697 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_24| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_24|) 8))) (and (not (= .cse0 0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_6| 8)))))) is different from true [2021-12-07 01:21:23,783 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_25| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_7| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_25|) 8))) (and (not (= .cse0 0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_7| 8)))))) is different from true [2021-12-07 01:21:24,873 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_8| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_26|) 8))) (and (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_8|) (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_8| 8))) (not (= .cse0 0))))) is different from true [2021-12-07 01:21:25,942 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_9| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base_BEFORE_CALL_27|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to_old~0#1.offset_BEFORE_CALL_9| 8)) .cse0) (not (= .cse0 0))))) is different from true [2021-12-07 01:21:26,072 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-07 01:21:26,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 14 [2021-12-07 01:21:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 101 not checked. [2021-12-07 01:21:26,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:26,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962569721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:26,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:21:26,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 35] total 47 [2021-12-07 01:21:26,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10351325] [2021-12-07 01:21:26,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:26,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-07 01:21:26,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:26,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-07 01:21:26,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1833, Unknown=9, NotChecked=846, Total=2862 [2021-12-07 01:21:26,546 INFO L87 Difference]: Start difference. First operand 230 states and 304 transitions. Second operand has 47 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 39 states have internal predecessors, (169), 17 states have call successors, (40), 20 states have call predecessors, (40), 17 states have return successors, (36), 15 states have call predecessors, (36), 15 states have call successors, (36) [2021-12-07 01:23:18,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:18,192 INFO L93 Difference]: Finished difference Result 648 states and 878 transitions. [2021-12-07 01:23:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-07 01:23:18,193 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 39 states have internal predecessors, (169), 17 states have call successors, (40), 20 states have call predecessors, (40), 17 states have return successors, (36), 15 states have call predecessors, (36), 15 states have call successors, (36) Word has length 141 [2021-12-07 01:23:18,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:18,196 INFO L225 Difference]: With dead ends: 648 [2021-12-07 01:23:18,196 INFO L226 Difference]: Without dead ends: 431 [2021-12-07 01:23:18,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 144 SyntacticMatches, 24 SemanticMatches, 86 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 120.4s TimeCoverageRelationStatistics Valid=529, Invalid=5620, Unknown=49, NotChecked=1458, Total=7656 [2021-12-07 01:23:18,199 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 266 mSDsluCounter, 3356 mSDsCounter, 0 mSdLazyCounter, 2814 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 3630 SdHoareTripleChecker+Invalid, 7329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4334 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:18,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 3630 Invalid, 7329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2814 Invalid, 0 Unknown, 4334 Unchecked, 1.2s Time] [2021-12-07 01:23:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-07 01:23:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 371. [2021-12-07 01:23:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 255 states have (on average 1.1764705882352942) internal successors, (300), 257 states have internal predecessors, (300), 83 states have call successors, (83), 28 states have call predecessors, (83), 32 states have return successors, (111), 85 states have call predecessors, (111), 82 states have call successors, (111) [2021-12-07 01:23:18,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 494 transitions. [2021-12-07 01:23:18,222 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 494 transitions. Word has length 141 [2021-12-07 01:23:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:18,223 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 494 transitions. [2021-12-07 01:23:18,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 39 states have internal predecessors, (169), 17 states have call successors, (40), 20 states have call predecessors, (40), 17 states have return successors, (36), 15 states have call predecessors, (36), 15 states have call successors, (36) [2021-12-07 01:23:18,223 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 494 transitions. [2021-12-07 01:23:18,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-07 01:23:18,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:18,224 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:18,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:23:18,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 01:23:18,426 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:18,427 INFO L85 PathProgramCache]: Analyzing trace with hash -788225934, now seen corresponding path program 1 times [2021-12-07 01:23:18,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:18,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618627966] [2021-12-07 01:23:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:18,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:23:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 01:23:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:23:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:23:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:23:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:23:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:23:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:23:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:23:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-07 01:23:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:23:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-07 01:23:18,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:18,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618627966] [2021-12-07 01:23:18,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618627966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:18,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365913647] [2021-12-07 01:23:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:18,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:18,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:18,646 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:18,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:23:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:18,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 2830 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:23:18,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-07 01:23:19,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:19,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365913647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:19,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:19,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-07 01:23:19,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575356481] [2021-12-07 01:23:19,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:19,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:23:19,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:19,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:23:19,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:23:19,017 INFO L87 Difference]: Start difference. First operand 371 states and 494 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-07 01:23:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:19,046 INFO L93 Difference]: Finished difference Result 700 states and 943 transitions. [2021-12-07 01:23:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:23:19,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 141 [2021-12-07 01:23:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:19,049 INFO L225 Difference]: With dead ends: 700 [2021-12-07 01:23:19,049 INFO L226 Difference]: Without dead ends: 369 [2021-12-07 01:23:19,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:23:19,051 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 20 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:19,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 616 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-07 01:23:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 348. [2021-12-07 01:23:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 236 states have (on average 1.1694915254237288) internal successors, (276), 236 states have internal predecessors, (276), 82 states have call successors, (82), 27 states have call predecessors, (82), 29 states have return successors, (102), 84 states have call predecessors, (102), 81 states have call successors, (102) [2021-12-07 01:23:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 460 transitions. [2021-12-07 01:23:19,070 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 460 transitions. Word has length 141 [2021-12-07 01:23:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:19,070 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 460 transitions. [2021-12-07 01:23:19,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-07 01:23:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 460 transitions. [2021-12-07 01:23:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-07 01:23:19,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:19,072 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:19,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:23:19,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:19,273 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:19,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:19,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1150071030, now seen corresponding path program 1 times [2021-12-07 01:23:19,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:19,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006682723] [2021-12-07 01:23:19,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:19,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-07 01:23:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-07 01:23:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-07 01:23:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:23:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-07 01:23:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-07 01:23:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 01:23:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:23:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-07 01:23:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-07 01:23:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:23:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-07 01:23:19,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:19,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006682723] [2021-12-07 01:23:19,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006682723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:19,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554720576] [2021-12-07 01:23:19,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:19,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:19,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:19,587 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:19,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:23:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:19,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 2842 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:23:19,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-07 01:23:20,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:20,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554720576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:20,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:20,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-07 01:23:20,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854844049] [2021-12-07 01:23:20,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:20,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:23:20,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:23:20,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:23:20,008 INFO L87 Difference]: Start difference. First operand 348 states and 460 transitions. Second operand has 9 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-07 01:23:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:20,102 INFO L93 Difference]: Finished difference Result 670 states and 896 transitions. [2021-12-07 01:23:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:23:20,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 145 [2021-12-07 01:23:20,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:20,104 INFO L225 Difference]: With dead ends: 670 [2021-12-07 01:23:20,104 INFO L226 Difference]: Without dead ends: 353 [2021-12-07 01:23:20,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:23:20,106 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 12 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:20,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1552 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:23:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-07 01:23:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2021-12-07 01:23:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 240 states have (on average 1.1666666666666667) internal successors, (280), 241 states have internal predecessors, (280), 82 states have call successors, (82), 27 states have call predecessors, (82), 30 states have return successors, (110), 84 states have call predecessors, (110), 81 states have call successors, (110) [2021-12-07 01:23:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 472 transitions. [2021-12-07 01:23:20,124 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 472 transitions. Word has length 145 [2021-12-07 01:23:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:20,124 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 472 transitions. [2021-12-07 01:23:20,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-07 01:23:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 472 transitions. [2021-12-07 01:23:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-07 01:23:20,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:20,126 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:20,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:23:20,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:20,328 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash 849425339, now seen corresponding path program 1 times [2021-12-07 01:23:20,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:20,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685460798] [2021-12-07 01:23:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:20,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:23:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:23:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:23:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:23:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:23:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:23:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:23:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:23:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 01:23:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:23:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-07 01:23:20,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:20,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685460798] [2021-12-07 01:23:20,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685460798] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:20,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077925443] [2021-12-07 01:23:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:20,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:20,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:20,534 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:20,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:23:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:20,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 2847 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:23:20,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-07 01:23:20,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:20,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077925443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:20,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:20,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-07 01:23:20,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464985154] [2021-12-07 01:23:20,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:20,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:23:20,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:20,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:23:20,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:23:20,917 INFO L87 Difference]: Start difference. First operand 353 states and 472 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-07 01:23:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:20,942 INFO L93 Difference]: Finished difference Result 680 states and 922 transitions. [2021-12-07 01:23:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:23:20,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 147 [2021-12-07 01:23:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:20,944 INFO L225 Difference]: With dead ends: 680 [2021-12-07 01:23:20,944 INFO L226 Difference]: Without dead ends: 356 [2021-12-07 01:23:20,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:23:20,946 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 9 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:20,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 609 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-07 01:23:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 353. [2021-12-07 01:23:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 240 states have (on average 1.1583333333333334) internal successors, (278), 241 states have internal predecessors, (278), 82 states have call successors, (82), 27 states have call predecessors, (82), 30 states have return successors, (110), 84 states have call predecessors, (110), 81 states have call successors, (110) [2021-12-07 01:23:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 470 transitions. [2021-12-07 01:23:20,964 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 470 transitions. Word has length 147 [2021-12-07 01:23:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:20,965 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 470 transitions. [2021-12-07 01:23:20,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-07 01:23:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 470 transitions. [2021-12-07 01:23:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-07 01:23:20,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:20,966 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:21,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:23:21,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 01:23:21,167 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:21,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1343933697, now seen corresponding path program 1 times [2021-12-07 01:23:21,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:21,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802402129] [2021-12-07 01:23:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:21,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:23:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:23:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:23:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:23:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:23:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:23:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:23:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:23:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 01:23:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:23:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-07 01:23:21,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802402129] [2021-12-07 01:23:21,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802402129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856373253] [2021-12-07 01:23:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:21,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:21,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:21,343 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:21,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:23:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 2849 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:23:21,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-07 01:23:21,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:21,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856373253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:21,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:21,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-07 01:23:21,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828793045] [2021-12-07 01:23:21,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:21,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:23:21,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:21,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:23:21,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:23:21,721 INFO L87 Difference]: Start difference. First operand 353 states and 470 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-07 01:23:21,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:21,746 INFO L93 Difference]: Finished difference Result 670 states and 918 transitions. [2021-12-07 01:23:21,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:23:21,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 147 [2021-12-07 01:23:21,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:21,748 INFO L225 Difference]: With dead ends: 670 [2021-12-07 01:23:21,748 INFO L226 Difference]: Without dead ends: 346 [2021-12-07 01:23:21,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:23:21,750 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 34 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:21,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 607 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:21,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-07 01:23:21,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 331. [2021-12-07 01:23:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 222 states have (on average 1.1441441441441442) internal successors, (254), 222 states have internal predecessors, (254), 80 states have call successors, (80), 26 states have call predecessors, (80), 28 states have return successors, (105), 82 states have call predecessors, (105), 79 states have call successors, (105) [2021-12-07 01:23:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 439 transitions. [2021-12-07 01:23:21,768 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 439 transitions. Word has length 147 [2021-12-07 01:23:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:21,768 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 439 transitions. [2021-12-07 01:23:21,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-07 01:23:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 439 transitions. [2021-12-07 01:23:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-07 01:23:21,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:21,770 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:21,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 01:23:21,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:21,970 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash 584998529, now seen corresponding path program 1 times [2021-12-07 01:23:21,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:21,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757089429] [2021-12-07 01:23:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:21,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:23:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:23:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:23:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:23:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:23:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:23:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:23:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:23:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 01:23:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:23:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-07 01:23:22,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:22,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757089429] [2021-12-07 01:23:22,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757089429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:22,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:22,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-12-07 01:23:22,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678553916] [2021-12-07 01:23:22,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:22,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 01:23:22,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:22,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 01:23:22,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:23:22,812 INFO L87 Difference]: Start difference. First operand 331 states and 439 transitions. Second operand has 24 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 19 states have internal predecessors, (80), 11 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-07 01:23:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:24,662 INFO L93 Difference]: Finished difference Result 550 states and 740 transitions. [2021-12-07 01:23:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 01:23:24,662 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 19 states have internal predecessors, (80), 11 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 147 [2021-12-07 01:23:24,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:24,665 INFO L225 Difference]: With dead ends: 550 [2021-12-07 01:23:24,665 INFO L226 Difference]: Without dead ends: 446 [2021-12-07 01:23:24,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2021-12-07 01:23:24,666 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 484 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 3129 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 3556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 3129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:24,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 1080 Invalid, 3556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 3129 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 01:23:24,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-12-07 01:23:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 401. [2021-12-07 01:23:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 275 states have (on average 1.1527272727272728) internal successors, (317), 275 states have internal predecessors, (317), 94 states have call successors, (94), 29 states have call predecessors, (94), 31 states have return successors, (124), 96 states have call predecessors, (124), 93 states have call successors, (124) [2021-12-07 01:23:24,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 535 transitions. [2021-12-07 01:23:24,692 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 535 transitions. Word has length 147 [2021-12-07 01:23:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:24,692 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 535 transitions. [2021-12-07 01:23:24,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 19 states have internal predecessors, (80), 11 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-07 01:23:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 535 transitions. [2021-12-07 01:23:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-07 01:23:24,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:24,694 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:24,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-07 01:23:24,694 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2085942083, now seen corresponding path program 1 times [2021-12-07 01:23:24,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:24,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642902079] [2021-12-07 01:23:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:24,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:24,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:23:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:23:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:23:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:23:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:23:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:23:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:23:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:23:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-07 01:23:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:23:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-07 01:23:25,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:25,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642902079] [2021-12-07 01:23:25,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642902079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:25,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803463133] [2021-12-07 01:23:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:25,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:25,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:25,199 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:25,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 01:23:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-07 01:23:25,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:25,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:26,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-07 01:23:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 78 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 01:23:26,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-07 01:23:26,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803463133] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:23:26,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:23:26,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 21 [2021-12-07 01:23:26,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208293429] [2021-12-07 01:23:26,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:26,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:23:26,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:26,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:23:26,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:23:26,367 INFO L87 Difference]: Start difference. First operand 401 states and 535 transitions. Second operand has 21 states, 21 states have (on average 6.428571428571429) internal successors, (135), 16 states have internal predecessors, (135), 8 states have call successors, (36), 6 states have call predecessors, (36), 4 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-12-07 01:23:28,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:28,482 INFO L93 Difference]: Finished difference Result 776 states and 1080 transitions. [2021-12-07 01:23:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 01:23:28,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.428571428571429) internal successors, (135), 16 states have internal predecessors, (135), 8 states have call successors, (36), 6 states have call predecessors, (36), 4 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 150 [2021-12-07 01:23:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:28,486 INFO L225 Difference]: With dead ends: 776 [2021-12-07 01:23:28,486 INFO L226 Difference]: Without dead ends: 644 [2021-12-07 01:23:28,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 315 SyntacticMatches, 15 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2021-12-07 01:23:28,487 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 310 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 3367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:28,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 2003 Invalid, 3367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 2706 Invalid, 0 Unknown, 374 Unchecked, 1.6s Time] [2021-12-07 01:23:28,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-12-07 01:23:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 416. [2021-12-07 01:23:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 286 states have (on average 1.1433566433566433) internal successors, (327), 287 states have internal predecessors, (327), 96 states have call successors, (96), 30 states have call predecessors, (96), 33 states have return successors, (126), 98 states have call predecessors, (126), 95 states have call successors, (126) [2021-12-07 01:23:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 549 transitions. [2021-12-07 01:23:28,519 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 549 transitions. Word has length 150 [2021-12-07 01:23:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:28,519 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 549 transitions. [2021-12-07 01:23:28,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.428571428571429) internal successors, (135), 16 states have internal predecessors, (135), 8 states have call successors, (36), 6 states have call predecessors, (36), 4 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-12-07 01:23:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 549 transitions. [2021-12-07 01:23:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-07 01:23:28,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:28,521 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:28,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 01:23:28,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 01:23:28,722 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:28,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:28,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1475192455, now seen corresponding path program 1 times [2021-12-07 01:23:28,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:28,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251403101] [2021-12-07 01:23:28,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:28,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:23:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:23:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:23:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:23:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 01:23:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-07 01:23:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-07 01:23:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-07 01:23:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-07 01:23:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:23:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-07 01:23:29,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:29,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251403101] [2021-12-07 01:23:29,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251403101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:29,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:29,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-07 01:23:29,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867708380] [2021-12-07 01:23:29,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:29,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 01:23:29,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:29,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:23:29,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:23:29,217 INFO L87 Difference]: Start difference. First operand 416 states and 549 transitions. Second operand has 19 states, 17 states have (on average 4.352941176470588) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (20), 6 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-07 01:23:30,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:30,487 INFO L93 Difference]: Finished difference Result 463 states and 619 transitions. [2021-12-07 01:23:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:23:30,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.352941176470588) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (20), 6 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 151 [2021-12-07 01:23:30,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:30,490 INFO L225 Difference]: With dead ends: 463 [2021-12-07 01:23:30,490 INFO L226 Difference]: Without dead ends: 461 [2021-12-07 01:23:30,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:23:30,491 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 288 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 2426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:30,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 926 Invalid, 2426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-07 01:23:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-07 01:23:30,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 441. [2021-12-07 01:23:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 301 states have (on average 1.1428571428571428) internal successors, (344), 302 states have internal predecessors, (344), 104 states have call successors, (104), 32 states have call predecessors, (104), 35 states have return successors, (135), 106 states have call predecessors, (135), 103 states have call successors, (135) [2021-12-07 01:23:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 583 transitions. [2021-12-07 01:23:30,520 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 583 transitions. Word has length 151 [2021-12-07 01:23:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:30,520 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 583 transitions. [2021-12-07 01:23:30,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.352941176470588) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (20), 6 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-07 01:23:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 583 transitions. [2021-12-07 01:23:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-07 01:23:30,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:30,522 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:30,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-07 01:23:30,522 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:30,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:30,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1540605038, now seen corresponding path program 1 times [2021-12-07 01:23:30,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:30,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72121128] [2021-12-07 01:23:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:30,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:23:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:23:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-07 01:23:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-07 01:23:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 01:23:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-07 01:23:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-07 01:23:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-07 01:23:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-07 01:23:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-07 01:23:30,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:30,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72121128] [2021-12-07 01:23:30,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72121128] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:30,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717559930] [2021-12-07 01:23:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:30,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:30,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:30,832 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:30,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 01:23:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 2752 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:23:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 01:23:31,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:31,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717559930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:31,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:31,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-07 01:23:31,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297825218] [2021-12-07 01:23:31,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:31,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:23:31,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:31,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:23:31,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:23:31,210 INFO L87 Difference]: Start difference. First operand 441 states and 583 transitions. Second operand has 9 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-07 01:23:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:31,296 INFO L93 Difference]: Finished difference Result 781 states and 1054 transitions. [2021-12-07 01:23:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:23:31,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 146 [2021-12-07 01:23:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:31,299 INFO L225 Difference]: With dead ends: 781 [2021-12-07 01:23:31,299 INFO L226 Difference]: Without dead ends: 446 [2021-12-07 01:23:31,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:23:31,301 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 12 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:31,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1581 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-12-07 01:23:31,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2021-12-07 01:23:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 305 states have (on average 1.140983606557377) internal successors, (348), 307 states have internal predecessors, (348), 104 states have call successors, (104), 32 states have call predecessors, (104), 36 states have return successors, (146), 106 states have call predecessors, (146), 103 states have call successors, (146) [2021-12-07 01:23:31,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 598 transitions. [2021-12-07 01:23:31,330 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 598 transitions. Word has length 146 [2021-12-07 01:23:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:31,330 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 598 transitions. [2021-12-07 01:23:31,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-07 01:23:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 598 transitions. [2021-12-07 01:23:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-07 01:23:31,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:31,332 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:31,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-07 01:23:31,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:31,534 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:31,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:31,535 INFO L85 PathProgramCache]: Analyzing trace with hash 416776065, now seen corresponding path program 1 times [2021-12-07 01:23:31,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:31,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601302112] [2021-12-07 01:23:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:31,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:23:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:23:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:23:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:23:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:23:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:23:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:23:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:23:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 01:23:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-07 01:23:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-07 01:23:31,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:31,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601302112] [2021-12-07 01:23:31,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601302112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:31,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:31,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-07 01:23:31,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563861458] [2021-12-07 01:23:31,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:31,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:23:31,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:31,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:23:31,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:23:31,790 INFO L87 Difference]: Start difference. First operand 446 states and 598 transitions. Second operand has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-07 01:23:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:32,111 INFO L93 Difference]: Finished difference Result 458 states and 612 transitions. [2021-12-07 01:23:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:23:32,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 149 [2021-12-07 01:23:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:32,114 INFO L225 Difference]: With dead ends: 458 [2021-12-07 01:23:32,114 INFO L226 Difference]: Without dead ends: 456 [2021-12-07 01:23:32,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:23:32,115 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 147 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:32,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1057 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:23:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-07 01:23:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 453. [2021-12-07 01:23:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 308 states have (on average 1.1396103896103895) internal successors, (351), 310 states have internal predecessors, (351), 107 states have call successors, (107), 33 states have call predecessors, (107), 37 states have return successors, (149), 109 states have call predecessors, (149), 106 states have call successors, (149) [2021-12-07 01:23:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 607 transitions. [2021-12-07 01:23:32,144 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 607 transitions. Word has length 149 [2021-12-07 01:23:32,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:32,145 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 607 transitions. [2021-12-07 01:23:32,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-07 01:23:32,145 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 607 transitions. [2021-12-07 01:23:32,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-07 01:23:32,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:32,146 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:32,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-07 01:23:32,147 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:32,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:32,147 INFO L85 PathProgramCache]: Analyzing trace with hash -787005427, now seen corresponding path program 1 times [2021-12-07 01:23:32,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:32,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992255969] [2021-12-07 01:23:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:32,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:23:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:23:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:23:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:23:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:23:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:23:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-07 01:23:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 01:23:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-07 01:23:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-07 01:23:32,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:32,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992255969] [2021-12-07 01:23:32,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992255969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:32,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91689333] [2021-12-07 01:23:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:32,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:32,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:32,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:32,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 01:23:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:32,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 2757 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 01:23:32,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-07 01:23:32,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:32,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91689333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:32,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:32,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-12-07 01:23:32,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354556822] [2021-12-07 01:23:32,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:32,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:23:32,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:32,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:23:32,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:23:32,825 INFO L87 Difference]: Start difference. First operand 453 states and 607 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-07 01:23:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:32,970 INFO L93 Difference]: Finished difference Result 807 states and 1106 transitions. [2021-12-07 01:23:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:23:32,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 148 [2021-12-07 01:23:32,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:32,972 INFO L225 Difference]: With dead ends: 807 [2021-12-07 01:23:32,972 INFO L226 Difference]: Without dead ends: 453 [2021-12-07 01:23:32,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:23:32,974 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 17 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:32,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 722 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-12-07 01:23:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-12-07 01:23:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2021-12-07 01:23:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 308 states have (on average 1.1363636363636365) internal successors, (350), 310 states have internal predecessors, (350), 107 states have call successors, (107), 33 states have call predecessors, (107), 37 states have return successors, (149), 109 states have call predecessors, (149), 106 states have call successors, (149) [2021-12-07 01:23:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 606 transitions. [2021-12-07 01:23:33,004 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 606 transitions. Word has length 148 [2021-12-07 01:23:33,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:33,004 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 606 transitions. [2021-12-07 01:23:33,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-07 01:23:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 606 transitions. [2021-12-07 01:23:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-07 01:23:33,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:33,006 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:33,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 01:23:33,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:33,208 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:33,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1430624971, now seen corresponding path program 1 times [2021-12-07 01:23:33,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:33,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686747064] [2021-12-07 01:23:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:33,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:23:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:23:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:23:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:23:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:23:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:23:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-07 01:23:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 01:23:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-07 01:23:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-07 01:23:33,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686747064] [2021-12-07 01:23:33,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686747064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428192805] [2021-12-07 01:23:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:33,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:33,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:33,467 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:33,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 01:23:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:33,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 2762 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:23:33,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-07 01:23:33,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:33,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428192805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:33,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:33,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-07 01:23:33,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808708683] [2021-12-07 01:23:33,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:33,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:23:33,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:33,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:23:33,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:23:33,850 INFO L87 Difference]: Start difference. First operand 453 states and 606 transitions. Second operand has 9 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-07 01:23:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:33,939 INFO L93 Difference]: Finished difference Result 758 states and 1019 transitions. [2021-12-07 01:23:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:23:33,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 148 [2021-12-07 01:23:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:33,942 INFO L225 Difference]: With dead ends: 758 [2021-12-07 01:23:33,942 INFO L226 Difference]: Without dead ends: 453 [2021-12-07 01:23:33,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:23:33,944 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 11 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:33,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1566 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-12-07 01:23:33,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2021-12-07 01:23:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 308 states have (on average 1.1363636363636365) internal successors, (350), 310 states have internal predecessors, (350), 107 states have call successors, (107), 33 states have call predecessors, (107), 37 states have return successors, (146), 109 states have call predecessors, (146), 106 states have call successors, (146) [2021-12-07 01:23:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 603 transitions. [2021-12-07 01:23:33,978 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 603 transitions. Word has length 148 [2021-12-07 01:23:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:33,978 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 603 transitions. [2021-12-07 01:23:33,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-07 01:23:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 603 transitions. [2021-12-07 01:23:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-07 01:23:33,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:33,980 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:34,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 01:23:34,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-07 01:23:34,181 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:34,182 INFO L85 PathProgramCache]: Analyzing trace with hash -267203196, now seen corresponding path program 1 times [2021-12-07 01:23:34,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:34,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068838773] [2021-12-07 01:23:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:34,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:23:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:23:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:23:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:23:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:23:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:23:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:23:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-07 01:23:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-07 01:23:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-07 01:23:34,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:34,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068838773] [2021-12-07 01:23:34,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068838773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:34,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477016611] [2021-12-07 01:23:34,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:34,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:34,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:34,585 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:34,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 01:23:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:34,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 2772 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-07 01:23:34,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:34,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:23:34,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:23:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-07 01:23:35,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:35,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477016611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:35,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:35,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 18 [2021-12-07 01:23:35,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255703167] [2021-12-07 01:23:35,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:35,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:23:35,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:23:35,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:23:35,229 INFO L87 Difference]: Start difference. First operand 453 states and 603 transitions. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 11 states have internal predecessors, (88), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-07 01:23:35,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:35,339 INFO L93 Difference]: Finished difference Result 1002 states and 1419 transitions. [2021-12-07 01:23:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:23:35,340 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 11 states have internal predecessors, (88), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 150 [2021-12-07 01:23:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:35,343 INFO L225 Difference]: With dead ends: 1002 [2021-12-07 01:23:35,343 INFO L226 Difference]: Without dead ends: 646 [2021-12-07 01:23:35,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:23:35,345 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 54 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:35,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1027 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-12-07 01:23:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-12-07 01:23:35,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 464. [2021-12-07 01:23:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 317 states have (on average 1.135646687697161) internal successors, (360), 320 states have internal predecessors, (360), 108 states have call successors, (108), 34 states have call predecessors, (108), 38 states have return successors, (148), 109 states have call predecessors, (148), 107 states have call successors, (148) [2021-12-07 01:23:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 616 transitions. [2021-12-07 01:23:35,379 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 616 transitions. Word has length 150 [2021-12-07 01:23:35,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:35,380 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 616 transitions. [2021-12-07 01:23:35,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 11 states have internal predecessors, (88), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-07 01:23:35,380 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 616 transitions. [2021-12-07 01:23:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-07 01:23:35,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:35,382 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:35,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 01:23:35,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:35,582 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:35,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1325041274, now seen corresponding path program 1 times [2021-12-07 01:23:35,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:35,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46254845] [2021-12-07 01:23:35,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:35,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:23:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:23:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:23:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:23:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:23:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:23:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:23:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-07 01:23:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-07 01:23:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-07 01:23:35,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:35,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46254845] [2021-12-07 01:23:35,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46254845] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:35,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457553426] [2021-12-07 01:23:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:35,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:35,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:35,741 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:35,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 01:23:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 2767 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:23:36,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-07 01:23:36,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:36,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457553426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:36,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:36,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-07 01:23:36,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945390195] [2021-12-07 01:23:36,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:36,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:23:36,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:36,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:23:36,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:23:36,101 INFO L87 Difference]: Start difference. First operand 464 states and 616 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-07 01:23:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:36,135 INFO L93 Difference]: Finished difference Result 823 states and 1118 transitions. [2021-12-07 01:23:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:23:36,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 150 [2021-12-07 01:23:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:36,138 INFO L225 Difference]: With dead ends: 823 [2021-12-07 01:23:36,138 INFO L226 Difference]: Without dead ends: 468 [2021-12-07 01:23:36,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:23:36,139 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 9 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:36,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 609 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-12-07 01:23:36,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 465. [2021-12-07 01:23:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 318 states have (on average 1.1320754716981132) internal successors, (360), 321 states have internal predecessors, (360), 108 states have call successors, (108), 34 states have call predecessors, (108), 38 states have return successors, (147), 109 states have call predecessors, (147), 107 states have call successors, (147) [2021-12-07 01:23:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 615 transitions. [2021-12-07 01:23:36,168 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 615 transitions. Word has length 150 [2021-12-07 01:23:36,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:36,168 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 615 transitions. [2021-12-07 01:23:36,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-07 01:23:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 615 transitions. [2021-12-07 01:23:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-07 01:23:36,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:36,170 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:36,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-07 01:23:36,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-07 01:23:36,371 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:36,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:36,372 INFO L85 PathProgramCache]: Analyzing trace with hash 374563591, now seen corresponding path program 1 times [2021-12-07 01:23:36,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:36,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446863008] [2021-12-07 01:23:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:36,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:23:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:23:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:23:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:23:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:23:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:23:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:23:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 01:23:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:23:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 01:23:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-07 01:23:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-07 01:23:36,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:36,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446863008] [2021-12-07 01:23:36,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446863008] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:36,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718286058] [2021-12-07 01:23:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:36,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:36,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:36,854 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:36,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 01:23:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:37,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 2843 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-07 01:23:37,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:37,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:37,258 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-07 01:23:37,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2021-12-07 01:23:37,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:23:37,544 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:23:37,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-07 01:23:51,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 01:24:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 109 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 01:24:08,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:09,198 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1786 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_1786) |c_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_append_with_lookup_harness_~#to~0#1.offset| 8)) 0))) is different from false [2021-12-07 01:24:09,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718286058] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:09,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:24:09,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2021-12-07 01:24:09,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775084092] [2021-12-07 01:24:09,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:09,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-07 01:24:09,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:09,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-07 01:24:09,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=4, NotChecked=70, Total=1406 [2021-12-07 01:24:09,208 INFO L87 Difference]: Start difference. First operand 465 states and 615 transitions. Second operand has 31 states, 29 states have (on average 5.551724137931035) internal successors, (161), 27 states have internal predecessors, (161), 15 states have call successors, (36), 8 states have call predecessors, (36), 8 states have return successors, (35), 15 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-07 01:24:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:18,946 INFO L93 Difference]: Finished difference Result 1030 states and 1414 transitions. [2021-12-07 01:24:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-07 01:24:18,947 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 5.551724137931035) internal successors, (161), 27 states have internal predecessors, (161), 15 states have call successors, (36), 8 states have call predecessors, (36), 8 states have return successors, (35), 15 states have call predecessors, (35), 15 states have call successors, (35) Word has length 153 [2021-12-07 01:24:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:18,952 INFO L225 Difference]: With dead ends: 1030 [2021-12-07 01:24:18,952 INFO L226 Difference]: Without dead ends: 711 [2021-12-07 01:24:18,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 247 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=288, Invalid=2363, Unknown=5, NotChecked=100, Total=2756 [2021-12-07 01:24:18,955 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 390 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 2073 SdHoareTripleChecker+Invalid, 3760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 728 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:18,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 2073 Invalid, 3760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 2706 Invalid, 0 Unknown, 728 Unchecked, 1.3s Time] [2021-12-07 01:24:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-12-07 01:24:18,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 597. [2021-12-07 01:24:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 411 states have (on average 1.1265206812652069) internal successors, (463), 417 states have internal predecessors, (463), 139 states have call successors, (139), 41 states have call predecessors, (139), 46 states have return successors, (199), 138 states have call predecessors, (199), 138 states have call successors, (199) [2021-12-07 01:24:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 801 transitions. [2021-12-07 01:24:18,995 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 801 transitions. Word has length 153 [2021-12-07 01:24:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:18,995 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 801 transitions. [2021-12-07 01:24:18,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 5.551724137931035) internal successors, (161), 27 states have internal predecessors, (161), 15 states have call successors, (36), 8 states have call predecessors, (36), 8 states have return successors, (35), 15 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-07 01:24:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 801 transitions. [2021-12-07 01:24:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-07 01:24:18,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:18,998 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:19,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 01:24:19,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-07 01:24:19,198 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:19,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1249793006, now seen corresponding path program 1 times [2021-12-07 01:24:19,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:19,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279714904] [2021-12-07 01:24:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:19,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:24:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:24:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-07 01:24:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:24:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-07 01:24:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-07 01:24:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-07 01:24:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:24:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:24:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-07 01:24:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-07 01:24:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-07 01:24:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-07 01:24:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-07 01:24:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-07 01:24:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-07 01:24:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-07 01:24:19,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:19,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279714904] [2021-12-07 01:24:19,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279714904] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:19,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867065357] [2021-12-07 01:24:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:19,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:19,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:19,643 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:19,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 01:24:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2856 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-07 01:24:19,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:20,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-07 01:24:28,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:24:28,369 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-07 01:24:28,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2021-12-07 01:24:31,005 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1903 Int) (v_ArrVal_1906 Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (and (<= |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| |c_aws_add_size_checked_#in~r#1.offset|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_1906))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_1903))))) is different from true [2021-12-07 01:24:31,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:31,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-07 01:24:31,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:31,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-07 01:24:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 53 proven. 62 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-07 01:24:31,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:32,508 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_15| Int)) (or (< |c_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset| |v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_15|) (and (forall ((v_ArrVal_1914 Int)) (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.base|) |v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_15| v_ArrVal_1914) (+ |c_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset| 8)) 0)) (forall ((v_ArrVal_1913 Int)) (= (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.base|) |v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_15| v_ArrVal_1913) (+ |c_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset| 8)) 0))))) is different from false [2021-12-07 01:24:32,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867065357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:32,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:24:32,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 40 [2021-12-07 01:24:32,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126259684] [2021-12-07 01:24:32,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:32,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-07 01:24:32,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:32,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-07 01:24:32,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1730, Unknown=3, NotChecked=170, Total=2070 [2021-12-07 01:24:32,512 INFO L87 Difference]: Start difference. First operand 597 states and 801 transitions. Second operand has 40 states, 38 states have (on average 4.2631578947368425) internal successors, (162), 35 states have internal predecessors, (162), 18 states have call successors, (39), 7 states have call predecessors, (39), 9 states have return successors, (38), 18 states have call predecessors, (38), 18 states have call successors, (38) [2021-12-07 01:24:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:56,066 INFO L93 Difference]: Finished difference Result 956 states and 1272 transitions. [2021-12-07 01:24:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-07 01:24:56,066 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 4.2631578947368425) internal successors, (162), 35 states have internal predecessors, (162), 18 states have call successors, (39), 7 states have call predecessors, (39), 9 states have return successors, (38), 18 states have call predecessors, (38), 18 states have call successors, (38) Word has length 158 [2021-12-07 01:24:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:56,069 INFO L225 Difference]: With dead ends: 956 [2021-12-07 01:24:56,069 INFO L226 Difference]: Without dead ends: 623 [2021-12-07 01:24:56,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 175 SyntacticMatches, 19 SemanticMatches, 65 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=335, Invalid=3817, Unknown=16, NotChecked=254, Total=4422 [2021-12-07 01:24:56,072 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 308 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 2483 SdHoareTripleChecker+Invalid, 3575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1283 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:56,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 2483 Invalid, 3575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 2041 Invalid, 0 Unknown, 1283 Unchecked, 0.9s Time] [2021-12-07 01:24:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-12-07 01:24:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 504. [2021-12-07 01:24:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 365 states have (on average 1.1205479452054794) internal successors, (409), 371 states have internal predecessors, (409), 95 states have call successors, (95), 39 states have call predecessors, (95), 43 states have return successors, (128), 93 states have call predecessors, (128), 94 states have call successors, (128) [2021-12-07 01:24:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 632 transitions. [2021-12-07 01:24:56,103 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 632 transitions. Word has length 158 [2021-12-07 01:24:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:56,103 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 632 transitions. [2021-12-07 01:24:56,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 4.2631578947368425) internal successors, (162), 35 states have internal predecessors, (162), 18 states have call successors, (39), 7 states have call predecessors, (39), 9 states have return successors, (38), 18 states have call predecessors, (38), 18 states have call successors, (38) [2021-12-07 01:24:56,104 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 632 transitions. [2021-12-07 01:24:56,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-07 01:24:56,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:56,105 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:56,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 01:24:56,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 01:24:56,306 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:56,307 INFO L85 PathProgramCache]: Analyzing trace with hash 36834957, now seen corresponding path program 1 times [2021-12-07 01:24:56,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:56,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95434479] [2021-12-07 01:24:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:56,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:24:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:24:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:24:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:24:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:24:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:24:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:24:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:24:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:24:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:24:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 01:24:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-07 01:24:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-07 01:24:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-07 01:24:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-07 01:24:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-07 01:24:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-07 01:24:56,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:56,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95434479] [2021-12-07 01:24:56,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95434479] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:56,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133125783] [2021-12-07 01:24:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:56,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:56,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:56,596 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:56,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 01:24:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 2850 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:24:56,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-07 01:24:57,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:57,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133125783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:57,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:24:57,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-12-07 01:24:57,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29814846] [2021-12-07 01:24:57,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:57,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:24:57,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:24:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:24:57,005 INFO L87 Difference]: Start difference. First operand 504 states and 632 transitions. Second operand has 9 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-07 01:24:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:57,103 INFO L93 Difference]: Finished difference Result 811 states and 1047 transitions. [2021-12-07 01:24:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:24:57,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 157 [2021-12-07 01:24:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:57,106 INFO L225 Difference]: With dead ends: 811 [2021-12-07 01:24:57,106 INFO L226 Difference]: Without dead ends: 488 [2021-12-07 01:24:57,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:24:57,108 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 12 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:57,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1550 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:24:57,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-12-07 01:24:57,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 480. [2021-12-07 01:24:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 342 states have (on average 1.105263157894737) internal successors, (378), 348 states have internal predecessors, (378), 95 states have call successors, (95), 38 states have call predecessors, (95), 42 states have return successors, (132), 93 states have call predecessors, (132), 94 states have call successors, (132) [2021-12-07 01:24:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 605 transitions. [2021-12-07 01:24:57,136 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 605 transitions. Word has length 157 [2021-12-07 01:24:57,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:57,137 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 605 transitions. [2021-12-07 01:24:57,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-07 01:24:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 605 transitions. [2021-12-07 01:24:57,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-07 01:24:57,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:57,138 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:57,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 01:24:57,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-07 01:24:57,339 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:57,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:57,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1483978520, now seen corresponding path program 2 times [2021-12-07 01:24:57,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:57,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65800568] [2021-12-07 01:24:57,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:57,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:24:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:24:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:24:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:24:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:24:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:24:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:24:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:24:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:24:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:24:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:24:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:24:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:24:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:24:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:24:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-07 01:24:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-07 01:24:58,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:58,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65800568] [2021-12-07 01:24:58,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65800568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:58,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600708747] [2021-12-07 01:24:58,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:24:58,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:58,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:58,357 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:58,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 01:24:59,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:24:59,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:24:59,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 2852 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-07 01:24:59,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:59,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:24:59,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:25:00,162 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:25:00,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2021-12-07 01:25:00,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:25:00,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:25:00,175 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-07 01:25:00,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-07 01:25:00,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-12-07 01:25:03,351 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2144 Int) (v_ArrVal_2146 Int) (v_ArrVal_2148 Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (and (<= |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| |c_aws_add_size_checked_#in~r#1.offset|) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_2146))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_2144)) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_2148))))) is different from true [2021-12-07 01:25:03,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:25:03,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-07 01:25:03,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:25:03,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:25:03,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:25:03,407 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 01:25:03,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-12-07 01:25:03,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:25:03,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-07 01:25:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 69 proven. 60 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 01:25:04,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:25:11,155 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset_BEFORE_CALL_19| Int) (v_ArrVal_2146 Int)) (let ((.cse0 (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset_BEFORE_CALL_19| 16))) (or (< |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset_BEFORE_CALL_19| |c_aws_add_size_checked_#in~r#1.offset|) (and (forall ((v_ArrVal_2148 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_aws_add_size_checked_aws_add_u64_checked_~r#1.base| (store (select |c_#memory_$Pointer$.offset| |c_aws_add_size_checked_aws_add_u64_checked_~r#1.base|) |c_aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_2148)) |c_aws_add_size_checked_#in~r#1.base|) (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset_BEFORE_CALL_19| 8)) 0)) (forall ((v_ArrVal_2144 Int)) (= (select (select (store |c_#memory_$Pointer$.base| |c_aws_add_size_checked_aws_add_u64_checked_~r#1.base| (store (select |c_#memory_$Pointer$.base| |c_aws_add_size_checked_aws_add_u64_checked_~r#1.base|) |c_aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_2144)) |c_aws_add_size_checked_#in~r#1.base|) (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset_BEFORE_CALL_19| 8)) 0))) (and (= (mod (select (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) .cse0) 18446744073709551616) 0) (let ((.cse1 (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset_BEFORE_CALL_19| 8))) (or (not (= (select (select |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base|) .cse1) 0)) (not (= (select (select |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base|) .cse1) 0))))) (not (= (mod (select (select (store |c_#memory_int| |c_aws_add_size_checked_aws_add_u64_checked_~r#1.base| (store (select |c_#memory_int| |c_aws_add_size_checked_aws_add_u64_checked_~r#1.base|) |c_aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_2146)) |c_aws_add_size_checked_#in~r#1.base|) .cse0) 18446744073709551616) 0))))) is different from false [2021-12-07 01:25:11,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600708747] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:25:11,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:25:11,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29] total 42 [2021-12-07 01:25:11,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645246722] [2021-12-07 01:25:11,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:25:11,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-07 01:25:11,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:11,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-07 01:25:11,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2146, Unknown=2, NotChecked=190, Total=2550 [2021-12-07 01:25:11,283 INFO L87 Difference]: Start difference. First operand 480 states and 605 transitions. Second operand has 42 states, 40 states have (on average 4.525) internal successors, (181), 36 states have internal predecessors, (181), 15 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (34), 13 states have call predecessors, (34), 14 states have call successors, (34) [2021-12-07 01:25:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:55,644 INFO L93 Difference]: Finished difference Result 1184 states and 1721 transitions. [2021-12-07 01:25:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-07 01:25:55,645 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 4.525) internal successors, (181), 36 states have internal predecessors, (181), 15 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (34), 13 states have call predecessors, (34), 14 states have call successors, (34) Word has length 159 [2021-12-07 01:25:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:55,650 INFO L225 Difference]: With dead ends: 1184 [2021-12-07 01:25:55,650 INFO L226 Difference]: Without dead ends: 1003 [2021-12-07 01:25:55,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 186 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=520, Invalid=5786, Unknown=22, NotChecked=314, Total=6642 [2021-12-07 01:25:55,653 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 502 mSDsluCounter, 2838 mSDsCounter, 0 mSdLazyCounter, 3322 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 3156 SdHoareTripleChecker+Invalid, 6746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 3322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2880 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:55,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 3156 Invalid, 6746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 3322 Invalid, 0 Unknown, 2880 Unchecked, 1.9s Time] [2021-12-07 01:25:55,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-12-07 01:25:55,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 632. [2021-12-07 01:25:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 451 states have (on average 1.099778270509978) internal successors, (496), 459 states have internal predecessors, (496), 127 states have call successors, (127), 47 states have call predecessors, (127), 53 states have return successors, (189), 125 states have call predecessors, (189), 126 states have call successors, (189) [2021-12-07 01:25:55,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 812 transitions. [2021-12-07 01:25:55,709 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 812 transitions. Word has length 159 [2021-12-07 01:25:55,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:55,709 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 812 transitions. [2021-12-07 01:25:55,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 4.525) internal successors, (181), 36 states have internal predecessors, (181), 15 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (34), 13 states have call predecessors, (34), 14 states have call successors, (34) [2021-12-07 01:25:55,709 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 812 transitions. [2021-12-07 01:25:55,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-07 01:25:55,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:55,711 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:55,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 01:25:55,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 01:25:55,913 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:25:55,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:55,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1154351392, now seen corresponding path program 1 times [2021-12-07 01:25:55,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:55,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800832096] [2021-12-07 01:25:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:55,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:25:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:25:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:25:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:25:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:25:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:25:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:25:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:25:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:25:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:25:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:25:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:25:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:25:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:25:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:25:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:25:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:25:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-07 01:25:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-07 01:25:56,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:56,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800832096] [2021-12-07 01:25:56,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800832096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:25:56,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025621559] [2021-12-07 01:25:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:56,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:56,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:56,578 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:56,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 01:25:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:56,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 2854 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-07 01:25:56,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:56,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:25:57,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:25:57,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2021-12-07 01:25:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 143 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-07 01:25:58,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:26:00,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025621559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:26:00,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:26:00,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-12-07 01:26:00,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359614845] [2021-12-07 01:26:00,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:26:00,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-07 01:26:00,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:26:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-07 01:26:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1331, Unknown=1, NotChecked=0, Total=1482 [2021-12-07 01:26:00,927 INFO L87 Difference]: Start difference. First operand 632 states and 812 transitions. Second operand has 33 states, 31 states have (on average 5.451612903225806) internal successors, (169), 29 states have internal predecessors, (169), 13 states have call successors, (33), 6 states have call predecessors, (33), 9 states have return successors, (32), 11 states have call predecessors, (32), 13 states have call successors, (32) [2021-12-07 01:26:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:04,022 INFO L93 Difference]: Finished difference Result 1228 states and 1697 transitions. [2021-12-07 01:26:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 01:26:04,022 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 5.451612903225806) internal successors, (169), 29 states have internal predecessors, (169), 13 states have call successors, (33), 6 states have call predecessors, (33), 9 states have return successors, (32), 11 states have call predecessors, (32), 13 states have call successors, (32) Word has length 159 [2021-12-07 01:26:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:04,026 INFO L225 Difference]: With dead ends: 1228 [2021-12-07 01:26:04,027 INFO L226 Difference]: Without dead ends: 905 [2021-12-07 01:26:04,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 278 SyntacticMatches, 15 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=440, Invalid=3591, Unknown=1, NotChecked=0, Total=4032 [2021-12-07 01:26:04,029 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 462 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1930 SdHoareTripleChecker+Invalid, 3321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 594 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:04,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 1930 Invalid, 3321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 2434 Invalid, 0 Unknown, 594 Unchecked, 1.7s Time] [2021-12-07 01:26:04,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-12-07 01:26:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 703. [2021-12-07 01:26:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 505 states have (on average 1.102970297029703) internal successors, (557), 512 states have internal predecessors, (557), 141 states have call successors, (141), 52 states have call predecessors, (141), 56 states have return successors, (209), 138 states have call predecessors, (209), 140 states have call successors, (209) [2021-12-07 01:26:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 907 transitions. [2021-12-07 01:26:04,085 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 907 transitions. Word has length 159 [2021-12-07 01:26:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:04,085 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 907 transitions. [2021-12-07 01:26:04,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 5.451612903225806) internal successors, (169), 29 states have internal predecessors, (169), 13 states have call successors, (33), 6 states have call predecessors, (33), 9 states have return successors, (32), 11 states have call predecessors, (32), 13 states have call successors, (32) [2021-12-07 01:26:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 907 transitions. [2021-12-07 01:26:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-07 01:26:04,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:04,087 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:26:04,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-07 01:26:04,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-07 01:26:04,288 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:26:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1642398498, now seen corresponding path program 1 times [2021-12-07 01:26:04,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:26:04,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43372444] [2021-12-07 01:26:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:04,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:26:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:26:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:26:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:26:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:26:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:26:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:26:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:26:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:26:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:26:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:26:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:26:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:26:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:26:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:26:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:26:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:26:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:26:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-07 01:26:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-07 01:26:04,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:26:04,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43372444] [2021-12-07 01:26:04,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43372444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:26:04,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235250119] [2021-12-07 01:26:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:04,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:26:04,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:26:04,907 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:26:04,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 01:26:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:07,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2849 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-07 01:26:07,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:07,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:26:09,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:09,232 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-12-07 01:26:09,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 54 [2021-12-07 01:26:24,337 WARN L322 ript$VariableManager]: TermVariabe aux_div_v_arrayElimCell_28_45 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 01:26:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 111 proven. 19 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-07 01:26:24,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:26:26,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235250119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:26:26,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:26:26,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28] total 46 [2021-12-07 01:26:26,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647982721] [2021-12-07 01:26:26,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:26:26,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 01:26:26,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:26:26,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 01:26:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3645, Unknown=6, NotChecked=0, Total=3906 [2021-12-07 01:26:26,381 INFO L87 Difference]: Start difference. First operand 703 states and 907 transitions. Second operand has 46 states, 43 states have (on average 3.7906976744186047) internal successors, (163), 41 states have internal predecessors, (163), 14 states have call successors, (36), 8 states have call predecessors, (36), 10 states have return successors, (35), 11 states have call predecessors, (35), 13 states have call successors, (35) [2021-12-07 01:26:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:53,822 INFO L93 Difference]: Finished difference Result 1322 states and 1865 transitions. [2021-12-07 01:26:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-07 01:26:53,823 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 3.7906976744186047) internal successors, (163), 41 states have internal predecessors, (163), 14 states have call successors, (36), 8 states have call predecessors, (36), 10 states have return successors, (35), 11 states have call predecessors, (35), 13 states have call successors, (35) Word has length 159 [2021-12-07 01:26:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:53,829 INFO L225 Difference]: With dead ends: 1322 [2021-12-07 01:26:53,829 INFO L226 Difference]: Without dead ends: 1134 [2021-12-07 01:26:53,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 246 SyntacticMatches, 9 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4079 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=1222, Invalid=13284, Unknown=14, NotChecked=0, Total=14520 [2021-12-07 01:26:53,833 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 596 mSDsluCounter, 2321 mSDsCounter, 0 mSdLazyCounter, 6474 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 2590 SdHoareTripleChecker+Invalid, 8583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 6474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1572 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:53,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 2590 Invalid, 8583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 6474 Invalid, 0 Unknown, 1572 Unchecked, 4.9s Time] [2021-12-07 01:26:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-12-07 01:26:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 807. [2021-12-07 01:26:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 595 states have (on average 1.1025210084033614) internal successors, (656), 604 states have internal predecessors, (656), 147 states have call successors, (147), 58 states have call predecessors, (147), 64 states have return successors, (231), 144 states have call predecessors, (231), 146 states have call successors, (231) [2021-12-07 01:26:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1034 transitions. [2021-12-07 01:26:53,903 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1034 transitions. Word has length 159 [2021-12-07 01:26:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:53,903 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1034 transitions. [2021-12-07 01:26:53,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 3.7906976744186047) internal successors, (163), 41 states have internal predecessors, (163), 14 states have call successors, (36), 8 states have call predecessors, (36), 10 states have return successors, (35), 11 states have call predecessors, (35), 13 states have call successors, (35) [2021-12-07 01:26:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1034 transitions. [2021-12-07 01:26:53,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-07 01:26:53,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:53,906 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:26:53,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 01:26:54,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:26:54,107 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:26:54,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:54,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1384233060, now seen corresponding path program 1 times [2021-12-07 01:26:54,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:26:54,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379256398] [2021-12-07 01:26:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:54,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:26:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:26:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:26:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:26:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:26:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:26:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:26:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:26:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:26:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:26:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:26:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:26:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:26:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:26:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:26:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:26:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:26:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:26:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-07 01:26:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-07 01:26:54,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:26:54,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379256398] [2021-12-07 01:26:54,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379256398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:26:54,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:26:54,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 01:26:54,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847928834] [2021-12-07 01:26:54,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:26:54,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:26:54,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:26:54,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:26:54,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:26:54,388 INFO L87 Difference]: Start difference. First operand 807 states and 1034 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-07 01:26:54,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:54,766 INFO L93 Difference]: Finished difference Result 1031 states and 1328 transitions. [2021-12-07 01:26:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:26:54,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 159 [2021-12-07 01:26:54,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:54,770 INFO L225 Difference]: With dead ends: 1031 [2021-12-07 01:26:54,770 INFO L226 Difference]: Without dead ends: 803 [2021-12-07 01:26:54,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:26:54,772 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 165 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:54,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 462 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:26:54,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-12-07 01:26:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 788. [2021-12-07 01:26:54,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 578 states have (on average 1.0951557093425606) internal successors, (633), 585 states have internal predecessors, (633), 147 states have call successors, (147), 58 states have call predecessors, (147), 62 states have return successors, (217), 144 states have call predecessors, (217), 146 states have call successors, (217) [2021-12-07 01:26:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 997 transitions. [2021-12-07 01:26:54,827 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 997 transitions. Word has length 159 [2021-12-07 01:26:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:54,828 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 997 transitions. [2021-12-07 01:26:54,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-07 01:26:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 997 transitions. [2021-12-07 01:26:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-07 01:26:54,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:54,830 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:26:54,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-07 01:26:54,830 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:26:54,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:54,830 INFO L85 PathProgramCache]: Analyzing trace with hash 991352346, now seen corresponding path program 1 times [2021-12-07 01:26:54,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:26:54,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125404339] [2021-12-07 01:26:54,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:54,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:26:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:26:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:26:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:26:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:26:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:26:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:26:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:26:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:26:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:26:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:26:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:26:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:26:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:26:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:26:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:26:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:26:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:26:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-07 01:26:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-07 01:26:55,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:26:55,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125404339] [2021-12-07 01:26:55,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125404339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:26:55,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668994902] [2021-12-07 01:26:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:55,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:26:55,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:26:55,400 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:26:55,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 01:26:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 2857 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-07 01:26:55,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:55,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:26:56,362 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:26:56,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-12-07 01:26:56,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:26:56,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:26:56,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 01:27:00,028 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2571 Int) (v_ArrVal_2570 Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (and (<= |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| |c_aws_add_size_checked_#in~r#1.offset|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_2570))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_2571))))) is different from true [2021-12-07 01:27:00,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-12-07 01:27:00,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:27:00,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-07 01:27:00,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:27:00,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-07 01:27:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 86 proven. 58 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:27:00,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:27:01,935 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_28| Int)) (or (< |c_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset| |v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_28|) (and (forall ((v_ArrVal_2578 Int)) (= (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.base|) |v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_28| v_ArrVal_2578) (+ |c_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset| 8)) 0)) (forall ((v_ArrVal_2579 Int)) (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.base|) |v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_28| v_ArrVal_2579) (+ |c_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset| 8)) 0))))) is different from false [2021-12-07 01:27:01,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668994902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:27:01,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:27:01,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 43 [2021-12-07 01:27:01,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330878017] [2021-12-07 01:27:01,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:27:01,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-07 01:27:01,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:27:01,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-07 01:27:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2003, Unknown=2, NotChecked=182, Total=2352 [2021-12-07 01:27:01,938 INFO L87 Difference]: Start difference. First operand 788 states and 997 transitions. Second operand has 43 states, 41 states have (on average 4.121951219512195) internal successors, (169), 38 states have internal predecessors, (169), 20 states have call successors, (37), 8 states have call predecessors, (37), 10 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) [2021-12-07 01:27:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:27:32,250 INFO L93 Difference]: Finished difference Result 1470 states and 2054 transitions. [2021-12-07 01:27:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-07 01:27:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 4.121951219512195) internal successors, (169), 38 states have internal predecessors, (169), 20 states have call successors, (37), 8 states have call predecessors, (37), 10 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) Word has length 159 [2021-12-07 01:27:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:27:32,256 INFO L225 Difference]: With dead ends: 1470 [2021-12-07 01:27:32,256 INFO L226 Difference]: Without dead ends: 1140 [2021-12-07 01:27:32,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 188 SyntacticMatches, 19 SemanticMatches, 79 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=479, Invalid=5675, Unknown=16, NotChecked=310, Total=6480 [2021-12-07 01:27:32,257 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 566 mSDsluCounter, 4798 mSDsCounter, 0 mSdLazyCounter, 7127 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 5193 SdHoareTripleChecker+Invalid, 10399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 7127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2684 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:27:32,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 5193 Invalid, 10399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 7127 Invalid, 0 Unknown, 2684 Unchecked, 4.4s Time] [2021-12-07 01:27:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-12-07 01:27:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 728. [2021-12-07 01:27:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 533 states have (on average 1.0975609756097562) internal successors, (585), 541 states have internal predecessors, (585), 138 states have call successors, (138), 51 states have call predecessors, (138), 56 states have return successors, (200), 135 states have call predecessors, (200), 137 states have call successors, (200) [2021-12-07 01:27:32,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 923 transitions. [2021-12-07 01:27:32,323 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 923 transitions. Word has length 159 [2021-12-07 01:27:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:27:32,323 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 923 transitions. [2021-12-07 01:27:32,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 4.121951219512195) internal successors, (169), 38 states have internal predecessors, (169), 20 states have call successors, (37), 8 states have call predecessors, (37), 10 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) [2021-12-07 01:27:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 923 transitions. [2021-12-07 01:27:32,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-07 01:27:32,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:27:32,326 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:27:32,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-07 01:27:32,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:27:32,526 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:27:32,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:27:32,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1479399452, now seen corresponding path program 1 times [2021-12-07 01:27:32,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:27:32,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188502471] [2021-12-07 01:27:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:27:32,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:27:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:27:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:27:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:27:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:27:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:27:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:27:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:27:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:27:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:27:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:27:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:27:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:27:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:27:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:27:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:27:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:27:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:27:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:32,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-07 01:27:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-07 01:27:33,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:27:33,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188502471] [2021-12-07 01:27:33,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188502471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:27:33,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029034312] [2021-12-07 01:27:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:27:33,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:27:33,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:27:33,108 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:27:33,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 01:27:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:27:33,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 2862 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-07 01:27:33,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:27:33,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:27:34,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:27:34,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:27:34,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:27:34,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:27:34,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-12-07 01:27:37,627 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2695 Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (and (<= |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| |c_aws_add_size_checked_#in~r#1.offset|) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_2695))))) is different from true [2021-12-07 01:27:37,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:27:37,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:27:37,666 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-12-07 01:27:37,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 56 [2021-12-07 01:27:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 87 proven. 50 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:27:38,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:27:57,089 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2695 Int) (|v_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset_BEFORE_CALL_52| Int)) (let ((.cse0 (+ |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset_BEFORE_CALL_52| 16))) (or (= (mod (select (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) .cse0) 18446744073709551616) 0) (< |v_ULTIMATE.start_aws_byte_buf_append_with_lookup_~to#1.offset_BEFORE_CALL_52| |c_aws_add_size_checked_#in~r#1.offset|) (not (= 0 (mod (select (select (store |c_#memory_int| |c_aws_add_size_checked_aws_add_u64_checked_~r#1.base| (store (select |c_#memory_int| |c_aws_add_size_checked_aws_add_u64_checked_~r#1.base|) |c_aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_2695)) |c_aws_add_size_checked_#in~r#1.base|) .cse0) 18446744073709551616)))))) is different from false [2021-12-07 01:27:57,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029034312] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:27:57,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:27:57,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 29] total 45 [2021-12-07 01:27:57,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868760265] [2021-12-07 01:27:57,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:27:57,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-07 01:27:57,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:27:57,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-07 01:27:57,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2183, Unknown=2, NotChecked=190, Total=2550 [2021-12-07 01:27:57,104 INFO L87 Difference]: Start difference. First operand 728 states and 923 transitions. Second operand has 45 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 39 states have internal predecessors, (185), 16 states have call successors, (36), 8 states have call predecessors, (36), 10 states have return successors, (35), 13 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-07 01:28:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:28:28,966 INFO L93 Difference]: Finished difference Result 1285 states and 1756 transitions. [2021-12-07 01:28:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-07 01:28:28,966 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 39 states have internal predecessors, (185), 16 states have call successors, (36), 8 states have call predecessors, (36), 10 states have return successors, (35), 13 states have call predecessors, (35), 15 states have call successors, (35) Word has length 159 [2021-12-07 01:28:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:28:28,971 INFO L225 Difference]: With dead ends: 1285 [2021-12-07 01:28:28,971 INFO L226 Difference]: Without dead ends: 1021 [2021-12-07 01:28:28,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 185 SyntacticMatches, 23 SemanticMatches, 106 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 49.3s TimeCoverageRelationStatistics Valid=1125, Invalid=10000, Unknown=13, NotChecked=418, Total=11556 [2021-12-07 01:28:28,973 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 582 mSDsluCounter, 3740 mSDsCounter, 0 mSdLazyCounter, 7495 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 4068 SdHoareTripleChecker+Invalid, 12418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 7495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4496 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:28:28,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 4068 Invalid, 12418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 7495 Invalid, 0 Unknown, 4496 Unchecked, 4.8s Time] [2021-12-07 01:28:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-12-07 01:28:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 772. [2021-12-07 01:28:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 571 states have (on average 1.096322241681261) internal successors, (626), 580 states have internal predecessors, (626), 141 states have call successors, (141), 53 states have call predecessors, (141), 59 states have return successors, (209), 138 states have call predecessors, (209), 140 states have call successors, (209) [2021-12-07 01:28:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 976 transitions. [2021-12-07 01:28:29,035 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 976 transitions. Word has length 159 [2021-12-07 01:28:29,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:28:29,035 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 976 transitions. [2021-12-07 01:28:29,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 39 states have internal predecessors, (185), 16 states have call successors, (36), 8 states have call predecessors, (36), 10 states have return successors, (35), 13 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-07 01:28:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 976 transitions. [2021-12-07 01:28:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-07 01:28:29,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:28:29,037 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:28:29,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-07 01:28:29,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-07 01:28:29,238 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:28:29,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:28:29,239 INFO L85 PathProgramCache]: Analyzing trace with hash 199535774, now seen corresponding path program 1 times [2021-12-07 01:28:29,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:28:29,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719976600] [2021-12-07 01:28:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:28:29,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:28:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:28:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:28:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:28:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:28:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:28:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:28:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:28:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:28:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:28:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:28:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:28:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:28:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:28:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:28:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:28:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:29,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:28:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:30,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:28:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:30,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-07 01:28:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-07 01:28:30,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:28:30,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719976600] [2021-12-07 01:28:30,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719976600] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:28:30,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311287876] [2021-12-07 01:28:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:28:30,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:28:30,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:28:30,153 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:28:30,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 01:28:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:28:30,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 2857 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-07 01:28:30,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:28:30,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:28:37,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:28:37,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:28:37,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:28:37,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:28:37,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-12-07 01:28:42,904 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int) (v_ArrVal_2814 Int)) (and (<= |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| |c_aws_add_size_checked_#in~r#1.offset|) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_2814))))) is different from true [2021-12-07 01:28:42,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:28:42,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:28:42,952 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-12-07 01:28:42,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 56 [2021-12-07 01:28:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 87 proven. 50 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:28:43,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:12,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311287876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:12,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:29:12,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 49 [2021-12-07 01:29:12,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363899144] [2021-12-07 01:29:12,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:12,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-07 01:29:12,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:12,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-07 01:29:12,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2533, Unknown=7, NotChecked=102, Total=2862 [2021-12-07 01:29:12,986 INFO L87 Difference]: Start difference. First operand 772 states and 976 transitions. Second operand has 49 states, 48 states have (on average 3.9375) internal successors, (189), 42 states have internal predecessors, (189), 22 states have call successors, (37), 8 states have call predecessors, (37), 11 states have return successors, (36), 20 states have call predecessors, (36), 21 states have call successors, (36) [2021-12-07 01:30:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:13,557 INFO L93 Difference]: Finished difference Result 1269 states and 1727 transitions. [2021-12-07 01:30:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-07 01:30:13,557 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.9375) internal successors, (189), 42 states have internal predecessors, (189), 22 states have call successors, (37), 8 states have call predecessors, (37), 11 states have return successors, (36), 20 states have call predecessors, (36), 21 states have call successors, (36) Word has length 159 [2021-12-07 01:30:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:13,562 INFO L225 Difference]: With dead ends: 1269 [2021-12-07 01:30:13,562 INFO L226 Difference]: Without dead ends: 929 [2021-12-07 01:30:13,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 187 SyntacticMatches, 23 SemanticMatches, 103 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3786 ImplicationChecksByTransitivity, 97.5s TimeCoverageRelationStatistics Valid=1117, Invalid=9553, Unknown=46, NotChecked=204, Total=10920 [2021-12-07 01:30:13,564 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 976 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 5650 mSolverCounterSat, 866 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 9432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 866 IncrementalHoareTripleChecker+Valid, 5650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2916 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:13,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1798 Invalid, 9432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [866 Valid, 5650 Invalid, 0 Unknown, 2916 Unchecked, 4.3s Time] [2021-12-07 01:30:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-12-07 01:30:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 681. [2021-12-07 01:30:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 489 states have (on average 1.0858895705521472) internal successors, (531), 498 states have internal predecessors, (531), 138 states have call successors, (138), 47 states have call predecessors, (138), 53 states have return successors, (189), 135 states have call predecessors, (189), 137 states have call successors, (189) [2021-12-07 01:30:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 858 transitions. [2021-12-07 01:30:13,630 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 858 transitions. Word has length 159 [2021-12-07 01:30:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:13,630 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 858 transitions. [2021-12-07 01:30:13,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.9375) internal successors, (189), 42 states have internal predecessors, (189), 22 states have call successors, (37), 8 states have call predecessors, (37), 11 states have return successors, (36), 20 states have call predecessors, (36), 21 states have call successors, (36) [2021-12-07 01:30:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 858 transitions. [2021-12-07 01:30:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-07 01:30:13,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:13,631 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:13,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-07 01:30:13,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:13,833 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:13,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1646977566, now seen corresponding path program 1 times [2021-12-07 01:30:13,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:13,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457058315] [2021-12-07 01:30:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:13,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:14,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:30:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:14,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:30:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:14,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:30:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:14,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:30:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:14,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:30:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:14,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:30:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:14,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:30:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:14,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:30:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:15,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:30:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:15,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:30:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:15,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:30:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:15,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:30:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:15,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:30:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:15,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:30:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:15,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:30:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:15,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:30:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:15,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:30:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:15,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-07 01:30:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-07 01:30:15,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:15,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457058315] [2021-12-07 01:30:15,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457058315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:15,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040475048] [2021-12-07 01:30:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:15,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:15,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:30:15,391 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:30:15,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-07 01:30:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:18,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 2859 conjuncts, 159 conjunts are in the unsatisfiable core [2021-12-07 01:30:18,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:18,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:30:18,938 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:30:18,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:30:18,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:30:20,024 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:30:20,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-07 01:30:32,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-12-07 01:30:44,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:30:44,349 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-12-07 01:30:44,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 58 treesize of output 44 [2021-12-07 01:30:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 58 proven. 85 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-07 01:30:53,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:31:14,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040475048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:31:14,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:31:14,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33] total 56 [2021-12-07 01:31:14,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858613217] [2021-12-07 01:31:14,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:31:14,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-07 01:31:14,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:31:14,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-07 01:31:14,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=4403, Unknown=7, NotChecked=0, Total=4692 [2021-12-07 01:31:14,445 INFO L87 Difference]: Start difference. First operand 681 states and 858 transitions. Second operand has 56 states, 53 states have (on average 3.5849056603773586) internal successors, (190), 50 states have internal predecessors, (190), 19 states have call successors, (36), 10 states have call predecessors, (36), 14 states have return successors, (34), 16 states have call predecessors, (34), 18 states have call successors, (34) [2021-12-07 01:31:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:31:31,704 INFO L93 Difference]: Finished difference Result 1036 states and 1353 transitions. [2021-12-07 01:31:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-07 01:31:31,705 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 3.5849056603773586) internal successors, (190), 50 states have internal predecessors, (190), 19 states have call successors, (36), 10 states have call predecessors, (36), 14 states have return successors, (34), 16 states have call predecessors, (34), 18 states have call successors, (34) Word has length 159 [2021-12-07 01:31:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:31:31,710 INFO L225 Difference]: With dead ends: 1036 [2021-12-07 01:31:31,710 INFO L226 Difference]: Without dead ends: 831 [2021-12-07 01:31:31,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 245 SyntacticMatches, 25 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4921 ImplicationChecksByTransitivity, 65.2s TimeCoverageRelationStatistics Valid=927, Invalid=13584, Unknown=9, NotChecked=0, Total=14520 [2021-12-07 01:31:31,712 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 407 mSDsluCounter, 3387 mSDsCounter, 0 mSdLazyCounter, 6854 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 3663 SdHoareTripleChecker+Invalid, 11994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 6854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4756 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:31:31,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 3663 Invalid, 11994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 6854 Invalid, 0 Unknown, 4756 Unchecked, 6.3s Time] [2021-12-07 01:31:31,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-12-07 01:31:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 742. [2021-12-07 01:31:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 533 states have (on average 1.0825515947467168) internal successors, (577), 543 states have internal predecessors, (577), 153 states have call successors, (153), 48 states have call predecessors, (153), 55 states have return successors, (208), 150 states have call predecessors, (208), 152 states have call successors, (208) [2021-12-07 01:31:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 938 transitions. [2021-12-07 01:31:31,788 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 938 transitions. Word has length 159 [2021-12-07 01:31:31,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:31:31,789 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 938 transitions. [2021-12-07 01:31:31,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 3.5849056603773586) internal successors, (190), 50 states have internal predecessors, (190), 19 states have call successors, (36), 10 states have call predecessors, (36), 14 states have return successors, (34), 16 states have call predecessors, (34), 18 states have call successors, (34) [2021-12-07 01:31:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 938 transitions. [2021-12-07 01:31:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-07 01:31:31,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:31:31,790 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:31:31,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-07 01:31:31,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-07 01:31:31,992 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:31:31,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:31:31,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1575989291, now seen corresponding path program 1 times [2021-12-07 01:31:31,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:31:31,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111917802] [2021-12-07 01:31:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:31,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:31:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:31:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:31:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:31:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:31:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:31:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:31:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:31:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:31:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:31:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:31:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:31:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:31:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:31:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:31:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:31:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:31:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:31:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:31:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-07 01:31:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:31:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-07 01:31:33,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:31:33,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111917802] [2021-12-07 01:31:33,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111917802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:31:33,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:31:33,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-12-07 01:31:33,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350151982] [2021-12-07 01:31:33,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:31:33,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-07 01:31:33,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:31:33,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-07 01:31:33,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-12-07 01:31:33,844 INFO L87 Difference]: Start difference. First operand 742 states and 938 transitions. Second operand has 26 states, 23 states have (on average 4.0) internal successors, (92), 22 states have internal predecessors, (92), 13 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2021-12-07 01:31:40,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:31:40,883 INFO L93 Difference]: Finished difference Result 858 states and 1097 transitions. [2021-12-07 01:31:40,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 01:31:40,884 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 4.0) internal successors, (92), 22 states have internal predecessors, (92), 13 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) Word has length 162 [2021-12-07 01:31:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:31:40,887 INFO L225 Difference]: With dead ends: 858 [2021-12-07 01:31:40,887 INFO L226 Difference]: Without dead ends: 856 [2021-12-07 01:31:40,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=280, Invalid=1790, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 01:31:40,888 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 373 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 4506 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 4917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 4506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:31:40,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 1882 Invalid, 4917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 4506 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-07 01:31:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-12-07 01:31:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 809. [2021-12-07 01:31:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 585 states have (on average 1.0854700854700854) internal successors, (635), 597 states have internal predecessors, (635), 163 states have call successors, (163), 51 states have call predecessors, (163), 60 states have return successors, (226), 160 states have call predecessors, (226), 162 states have call successors, (226) [2021-12-07 01:31:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1024 transitions. [2021-12-07 01:31:40,982 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1024 transitions. Word has length 162 [2021-12-07 01:31:40,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:31:40,982 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 1024 transitions. [2021-12-07 01:31:40,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 4.0) internal successors, (92), 22 states have internal predecessors, (92), 13 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2021-12-07 01:31:40,982 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1024 transitions. [2021-12-07 01:31:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-07 01:31:40,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:31:40,983 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:31:40,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-07 01:31:40,984 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:31:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:31:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash 552050607, now seen corresponding path program 1 times [2021-12-07 01:31:40,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:31:40,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276585662] [2021-12-07 01:31:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:40,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:31:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:31:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:31:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:31:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:31:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:31:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:31:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:31:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:31:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:31:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:31:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:31:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:31:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:31:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:31:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:31:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:31:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:31:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:31:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-07 01:31:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:31:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-07 01:31:41,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:31:41,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276585662] [2021-12-07 01:31:41,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276585662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:31:41,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:31:41,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-07 01:31:41,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063537231] [2021-12-07 01:31:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:31:41,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 01:31:41,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:31:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:31:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:31:41,594 INFO L87 Difference]: Start difference. First operand 809 states and 1024 transitions. Second operand has 19 states, 17 states have (on average 4.470588235294118) internal successors, (76), 15 states have internal predecessors, (76), 11 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-07 01:31:43,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:31:43,027 INFO L93 Difference]: Finished difference Result 827 states and 1049 transitions. [2021-12-07 01:31:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:31:43,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.470588235294118) internal successors, (76), 15 states have internal predecessors, (76), 11 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) Word has length 162 [2021-12-07 01:31:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:31:43,031 INFO L225 Difference]: With dead ends: 827 [2021-12-07 01:31:43,031 INFO L226 Difference]: Without dead ends: 825 [2021-12-07 01:31:43,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:31:43,032 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 387 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 2441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:31:43,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 817 Invalid, 2441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 2093 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-07 01:31:43,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-12-07 01:31:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 813. [2021-12-07 01:31:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 588 states have (on average 1.0850340136054422) internal successors, (638), 600 states have internal predecessors, (638), 163 states have call successors, (163), 52 states have call predecessors, (163), 61 states have return successors, (226), 160 states have call predecessors, (226), 162 states have call successors, (226) [2021-12-07 01:31:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1027 transitions. [2021-12-07 01:31:43,123 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1027 transitions. Word has length 162 [2021-12-07 01:31:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:31:43,123 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1027 transitions. [2021-12-07 01:31:43,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.470588235294118) internal successors, (76), 15 states have internal predecessors, (76), 11 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-07 01:31:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1027 transitions. [2021-12-07 01:31:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-07 01:31:43,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:31:43,125 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:31:43,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-07 01:31:43,125 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:31:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:31:43,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1499730589, now seen corresponding path program 1 times [2021-12-07 01:31:43,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:31:43,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400594364] [2021-12-07 01:31:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:43,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:31:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:31:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:31:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:31:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:31:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:31:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:31:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:31:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:31:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:31:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:31:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:31:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:31:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:31:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:31:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:31:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:31:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:31:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-07 01:31:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-07 01:31:43,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:31:43,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400594364] [2021-12-07 01:31:43,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400594364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:31:43,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:31:43,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-07 01:31:43,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224971212] [2021-12-07 01:31:43,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:31:43,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:31:43,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:31:43,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:31:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:31:43,339 INFO L87 Difference]: Start difference. First operand 813 states and 1027 transitions. Second operand has 12 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 8 states have internal predecessors, (69), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-07 01:31:43,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:31:43,890 INFO L93 Difference]: Finished difference Result 823 states and 1038 transitions. [2021-12-07 01:31:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:31:43,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 8 states have internal predecessors, (69), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 161 [2021-12-07 01:31:43,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:31:43,894 INFO L225 Difference]: With dead ends: 823 [2021-12-07 01:31:43,895 INFO L226 Difference]: Without dead ends: 821 [2021-12-07 01:31:43,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:31:43,895 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 92 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:31:43,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1363 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:31:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-12-07 01:31:43,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 819. [2021-12-07 01:31:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 591 states have (on average 1.0846023688663282) internal successors, (641), 603 states have internal predecessors, (641), 165 states have call successors, (165), 53 states have call predecessors, (165), 62 states have return successors, (228), 162 states have call predecessors, (228), 164 states have call successors, (228) [2021-12-07 01:31:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1034 transitions. [2021-12-07 01:31:43,988 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1034 transitions. Word has length 161 [2021-12-07 01:31:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:31:43,988 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1034 transitions. [2021-12-07 01:31:43,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 8 states have internal predecessors, (69), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-07 01:31:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1034 transitions. [2021-12-07 01:31:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-07 01:31:43,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:31:43,990 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:31:43,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-07 01:31:43,990 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:31:43,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:31:43,990 INFO L85 PathProgramCache]: Analyzing trace with hash -798666011, now seen corresponding path program 1 times [2021-12-07 01:31:43,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:31:43,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153453464] [2021-12-07 01:31:43,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:43,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:31:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:31:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:31:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:31:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:31:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:31:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:31:44,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:31:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:31:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:31:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:31:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:31:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:31:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:31:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:31:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:31:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:31:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:31:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-07 01:31:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-07 01:31:44,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:31:44,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153453464] [2021-12-07 01:31:44,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153453464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:31:44,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989661611] [2021-12-07 01:31:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:44,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:31:44,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:31:44,507 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:31:44,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-07 01:31:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 2859 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-07 01:31:44,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:31:44,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:31:45,146 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:31:45,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:31:45,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:31:45,793 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:31:45,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-07 01:32:03,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-12-07 01:32:55,644 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3213 Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (and (<= |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| |c_aws_add_size_checked_#in~r#1.offset|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| v_ArrVal_3213))))) is different from true [2021-12-07 01:32:55,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:32:55,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2021-12-07 01:33:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-07 01:33:05,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:29,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989661611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:33:29,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:33:29,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 35] total 52 [2021-12-07 01:33:29,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002397399] [2021-12-07 01:33:29,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:33:29,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-07 01:33:29,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:33:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-07 01:33:29,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3682, Unknown=9, NotChecked=122, Total=4032 [2021-12-07 01:33:29,410 INFO L87 Difference]: Start difference. First operand 819 states and 1034 transitions. Second operand has 52 states, 49 states have (on average 3.836734693877551) internal successors, (188), 45 states have internal predecessors, (188), 16 states have call successors, (38), 10 states have call predecessors, (38), 11 states have return successors, (36), 16 states have call predecessors, (36), 14 states have call successors, (36) [2021-12-07 01:33:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:56,110 INFO L93 Difference]: Finished difference Result 1161 states and 1460 transitions. [2021-12-07 01:33:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-07 01:33:56,111 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 3.836734693877551) internal successors, (188), 45 states have internal predecessors, (188), 16 states have call successors, (38), 10 states have call predecessors, (38), 11 states have return successors, (36), 16 states have call predecessors, (36), 14 states have call successors, (36) Word has length 161 [2021-12-07 01:33:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:56,115 INFO L225 Difference]: With dead ends: 1161 [2021-12-07 01:33:56,115 INFO L226 Difference]: Without dead ends: 1041 [2021-12-07 01:33:56,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 172 SyntacticMatches, 24 SemanticMatches, 111 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3825 ImplicationChecksByTransitivity, 127.8s TimeCoverageRelationStatistics Valid=725, Invalid=11698, Unknown=13, NotChecked=220, Total=12656 [2021-12-07 01:33:56,116 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 226 mSDsluCounter, 3387 mSDsCounter, 0 mSdLazyCounter, 3918 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 3613 SdHoareTripleChecker+Invalid, 6636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2618 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:56,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 3613 Invalid, 6636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3918 Invalid, 0 Unknown, 2618 Unchecked, 2.3s Time] [2021-12-07 01:33:56,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-12-07 01:33:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 978. [2021-12-07 01:33:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 719 states have (on average 1.0778859527121) internal successors, (775), 735 states have internal predecessors, (775), 181 states have call successors, (181), 65 states have call predecessors, (181), 77 states have return successors, (245), 177 states have call predecessors, (245), 180 states have call successors, (245) [2021-12-07 01:33:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1201 transitions. [2021-12-07 01:33:56,220 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1201 transitions. Word has length 161 [2021-12-07 01:33:56,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:56,220 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1201 transitions. [2021-12-07 01:33:56,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 3.836734693877551) internal successors, (188), 45 states have internal predecessors, (188), 16 states have call successors, (38), 10 states have call predecessors, (38), 11 states have return successors, (36), 16 states have call predecessors, (36), 14 states have call successors, (36) [2021-12-07 01:33:56,221 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1201 transitions. [2021-12-07 01:33:56,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-07 01:33:56,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:56,223 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:56,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-07 01:33:56,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-07 01:33:56,424 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:56,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:56,425 INFO L85 PathProgramCache]: Analyzing trace with hash -904183063, now seen corresponding path program 1 times [2021-12-07 01:33:56,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:33:56,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955359752] [2021-12-07 01:33:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:56,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:33:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:56,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:33:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:56,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:33:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:56,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:33:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:56,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:33:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:56,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:33:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:56,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:33:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:56,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:33:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:56,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:33:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:56,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:33:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:56,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:33:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:56,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:33:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:57,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:33:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:57,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:33:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:57,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 01:33:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:57,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 01:33:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:57,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-07 01:33:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:57,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:33:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:57,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-07 01:33:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-07 01:33:57,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:33:57,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955359752] [2021-12-07 01:33:57,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955359752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:33:57,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119644354] [2021-12-07 01:33:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:57,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:33:57,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:33:57,373 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:33:57,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46916219-3733-4f91-b8ba-f9a3038ee62c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-07 01:33:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:57,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 2869 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-07 01:33:57,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:57,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:33:58,030 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:33:58,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:33:58,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:33:58,416 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-07 01:33:58,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-07 01:34:16,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27