./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF --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 f26a5d85d152e590b5f8a93f229efbb28bdd5e77c34d7106bb5825fc4b732cf6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:19:16,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:19:16,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:19:16,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:19:16,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:19:16,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:19:16,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:19:16,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:19:16,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:19:16,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:19:16,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:19:16,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:19:16,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:19:16,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:19:16,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:19:16,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:19:16,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:19:16,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:19:16,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:19:16,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:19:16,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:19:16,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:19:16,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:19:16,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:19:16,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:19:16,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:19:16,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:19:16,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:19:16,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:19:16,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:19:16,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:19:16,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:19:16,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:19:16,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:19:16,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:19:16,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:19:16,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:19:16,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:19:16,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:19:16,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:19:16,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:19:16,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 07:19:16,990 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:19:16,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:19:16,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:19:16,993 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:19:16,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:19:16,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:19:17,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:19:17,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:19:17,001 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:19:17,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:19:17,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:19:17,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:19:17,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:19:17,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:19:17,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:19:17,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:19:17,003 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:19:17,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:19:17,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:19:17,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:19:17,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:19:17,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:19:17,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:19:17,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:19:17,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:19:17,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:19:17,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:19:17,008 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:19:17,009 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:19:17,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:19:17,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:19:17,011 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_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f26a5d85d152e590b5f8a93f229efbb28bdd5e77c34d7106bb5825fc4b732cf6 [2021-11-20 07:19:17,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:19:17,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:19:17,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:19:17,409 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:19:17,410 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:19:17,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i [2021-11-20 07:19:17,499 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/data/e725c0f24/d16986734d694e2f8058fbb707be1607/FLAG7642e3f04 [2021-11-20 07:19:18,555 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:19:18,559 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i [2021-11-20 07:19:18,624 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/data/e725c0f24/d16986734d694e2f8058fbb707be1607/FLAG7642e3f04 [2021-11-20 07:19:18,928 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/data/e725c0f24/d16986734d694e2f8058fbb707be1607 [2021-11-20 07:19:18,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:19:18,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:19:18,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:19:18,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:19:18,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:19:18,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:19:18" (1/1) ... [2021-11-20 07:19:18,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab95523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:18, skipping insertion in model container [2021-11-20 07:19:18,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:19:18" (1/1) ... [2021-11-20 07:19:18,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:19:19,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:19:19,625 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_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i[4497,4510] [2021-11-20 07:19:19,636 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_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i[4557,4570] [2021-11-20 07:19:21,000 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:21,006 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:21,008 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:21,009 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:21,013 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:21,055 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:21,056 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:21,058 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:21,063 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:21,655 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 07:19:21,657 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 07:19:21,658 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 07:19:21,660 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 07:19:21,663 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 07:19:21,664 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 07:19:21,664 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 07:19:21,668 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 07:19:21,669 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 07:19:21,670 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 07:19:21,912 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 07:19:22,132 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,133 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:19:22,326 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:19:22,355 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_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i[4497,4510] [2021-11-20 07:19:22,355 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_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i[4557,4570] [2021-11-20 07:19:22,394 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,395 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,396 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,396 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,397 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,404 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,405 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,406 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,407 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,443 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 07:19:22,444 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 07:19:22,445 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 07:19:22,446 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 07:19:22,448 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 07:19:22,448 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 07:19:22,449 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 07:19:22,450 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 07:19:22,450 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 07:19:22,451 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 07:19:22,475 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 07:19:22,535 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,535 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:19:22,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:19:22,913 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:19:22,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:22 WrapperNode [2021-11-20 07:19:22,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:19:22,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:19:22,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:19:22,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:19:22,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:22" (1/1) ... [2021-11-20 07:19:23,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:22" (1/1) ... [2021-11-20 07:19:23,267 INFO L137 Inliner]: procedures = 690, calls = 2642, calls flagged for inlining = 60, calls inlined = 7, statements flattened = 882 [2021-11-20 07:19:23,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:19:23,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:19:23,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:19:23,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:19:23,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:22" (1/1) ... [2021-11-20 07:19:23,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:22" (1/1) ... [2021-11-20 07:19:23,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:22" (1/1) ... [2021-11-20 07:19:23,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:22" (1/1) ... [2021-11-20 07:19:23,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:22" (1/1) ... [2021-11-20 07:19:23,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:22" (1/1) ... [2021-11-20 07:19:23,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:22" (1/1) ... [2021-11-20 07:19:23,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:19:23,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:19:23,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:19:23,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:19:23,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:22" (1/1) ... [2021-11-20 07:19:23,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:19:23,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:23,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:19:23,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:19:23,576 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-20 07:19:23,577 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-20 07:19:23,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:19:23,577 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 07:19:23,578 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 07:19:23,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:19:23,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 07:19:23,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 07:19:23,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:19:23,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:19:23,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:19:23,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:19:23,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:19:23,583 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 07:19:23,583 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 07:19:23,583 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-20 07:19:23,583 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-20 07:19:23,584 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 07:19:23,584 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 07:19:23,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:19:23,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:19:23,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:19:23,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:19:23,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:19:24,021 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:19:24,023 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:19:25,751 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:19:25,764 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:19:25,764 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 07:19:25,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:19:25 BoogieIcfgContainer [2021-11-20 07:19:25,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:19:25,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:19:25,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:19:25,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:19:25,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:19:18" (1/3) ... [2021-11-20 07:19:25,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10dff9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:19:25, skipping insertion in model container [2021-11-20 07:19:25,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:22" (2/3) ... [2021-11-20 07:19:25,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10dff9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:19:25, skipping insertion in model container [2021-11-20 07:19:25,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:19:25" (3/3) ... [2021-11-20 07:19:25,783 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_advance_harness.i [2021-11-20 07:19:25,790 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:19:25,790 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:19:25,867 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:19:25,882 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 [2021-11-20 07:19:25,882 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:19:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 07:19:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:19:25,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:25,935 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-20 07:19:25,937 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:25,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1865164224, now seen corresponding path program 1 times [2021-11-20 07:19:25,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:25,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062787993] [2021-11-20 07:19:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:25,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:26,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:19:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:26,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:19:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:26,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:19:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:26,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:19:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:26,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 07:19:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:26,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 07:19:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 07:19:26,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:26,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062787993] [2021-11-20 07:19:26,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062787993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:26,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:26,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:19:26,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171770194] [2021-11-20 07:19:26,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:26,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:19:26,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:26,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:19:26,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:19:26,908 INFO L87 Difference]: Start difference. First operand has 90 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:19:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:26,984 INFO L93 Difference]: Finished difference Result 170 states and 243 transitions. [2021-11-20 07:19:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:19:26,986 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-11-20 07:19:26,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:27,002 INFO L225 Difference]: With dead ends: 170 [2021-11-20 07:19:27,002 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 07:19:27,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:19:27,019 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:27,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:19:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 07:19:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-20 07:19:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 54 states have internal predecessors, (64), 22 states have call successors, (22), 6 states have call predecessors, (22), 5 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-20 07:19:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2021-11-20 07:19:27,079 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 47 [2021-11-20 07:19:27,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:27,081 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2021-11-20 07:19:27,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:19:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2021-11-20 07:19:27,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:19:27,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:27,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-20 07:19:27,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:19:27,090 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:27,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:27,092 INFO L85 PathProgramCache]: Analyzing trace with hash 866728124, now seen corresponding path program 1 times [2021-11-20 07:19:27,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:27,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603023109] [2021-11-20 07:19:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:27,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:27,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:19:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:27,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:19:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:27,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:19:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:27,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:19:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:27,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 07:19:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:27,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 07:19:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:19:27,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:27,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603023109] [2021-11-20 07:19:27,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603023109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:27,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351807072] [2021-11-20 07:19:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:27,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:27,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:27,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:27,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:19:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:28,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 2434 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:19:28,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:19:28,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:19:28,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351807072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:28,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:19:28,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-11-20 07:19:28,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228828560] [2021-11-20 07:19:28,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:28,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:19:28,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:28,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:19:28,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:28,700 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:19:28,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:28,990 INFO L93 Difference]: Finished difference Result 146 states and 197 transitions. [2021-11-20 07:19:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:19:28,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-11-20 07:19:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:28,998 INFO L225 Difference]: With dead ends: 146 [2021-11-20 07:19:28,999 INFO L226 Difference]: Without dead ends: 83 [2021-11-20 07:19:29,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:19:29,008 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 128 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:29,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 259 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:19:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-20 07:19:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-20 07:19:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 57 states have internal predecessors, (66), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (23), 19 states have call predecessors, (23), 19 states have call successors, (23) [2021-11-20 07:19:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2021-11-20 07:19:29,049 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 47 [2021-11-20 07:19:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:29,050 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2021-11-20 07:19:29,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:19:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2021-11-20 07:19:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:19:29,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:29,061 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:29,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:19:29,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:29,276 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:29,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:29,276 INFO L85 PathProgramCache]: Analyzing trace with hash -912055711, now seen corresponding path program 1 times [2021-11-20 07:19:29,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:29,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331553926] [2021-11-20 07:19:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:29,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:29,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:19:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:29,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:19:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:29,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:19:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:29,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:19:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:29,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:19:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:29,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 07:19:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:19:29,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:29,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331553926] [2021-11-20 07:19:29,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331553926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:29,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663758472] [2021-11-20 07:19:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:29,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:29,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:29,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:29,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:19:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:30,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 2439 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:19:30,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:19:30,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:19:30,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663758472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:30,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:19:30,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-20 07:19:30,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569280334] [2021-11-20 07:19:30,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:30,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:19:30,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:30,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:19:30,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:19:30,395 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:19:30,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:30,641 INFO L93 Difference]: Finished difference Result 141 states and 189 transitions. [2021-11-20 07:19:30,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:19:30,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2021-11-20 07:19:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:30,644 INFO L225 Difference]: With dead ends: 141 [2021-11-20 07:19:30,644 INFO L226 Difference]: Without dead ends: 83 [2021-11-20 07:19:30,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:19:30,646 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 145 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:30,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 257 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:19:30,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-20 07:19:30,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-20 07:19:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 57 states have internal predecessors, (66), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2021-11-20 07:19:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2021-11-20 07:19:30,660 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 49 [2021-11-20 07:19:30,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:30,660 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2021-11-20 07:19:30,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:19:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2021-11-20 07:19:30,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:19:30,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:30,663 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-20 07:19:30,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:19:30,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:30,880 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:30,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:30,880 INFO L85 PathProgramCache]: Analyzing trace with hash -633300053, now seen corresponding path program 1 times [2021-11-20 07:19:30,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:30,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348028438] [2021-11-20 07:19:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:30,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:31,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:19:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:31,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:19:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:31,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:19:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:31,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:19:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:31,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:19:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:31,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:19:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 07:19:31,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:31,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348028438] [2021-11-20 07:19:31,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348028438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:31,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:31,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:19:31,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181589537] [2021-11-20 07:19:31,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:31,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:19:31,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:31,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:19:31,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:19:31,371 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:19:31,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:31,472 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2021-11-20 07:19:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:19:31,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 53 [2021-11-20 07:19:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:31,478 INFO L225 Difference]: With dead ends: 95 [2021-11-20 07:19:31,478 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 07:19:31,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:19:31,485 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 16 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:31,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 701 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:19:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 07:19:31,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-11-20 07:19:31,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 60 states have (on average 1.2) internal successors, (72), 64 states have internal predecessors, (72), 23 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (27), 20 states have call predecessors, (27), 20 states have call successors, (27) [2021-11-20 07:19:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 122 transitions. [2021-11-20 07:19:31,517 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 122 transitions. Word has length 53 [2021-11-20 07:19:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:31,518 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 122 transitions. [2021-11-20 07:19:31,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:19:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 122 transitions. [2021-11-20 07:19:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:19:31,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:31,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:31,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:19:31,521 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:31,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1847539699, now seen corresponding path program 1 times [2021-11-20 07:19:31,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:31,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120023318] [2021-11-20 07:19:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:31,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:32,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:19:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:32,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:19:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:32,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:19:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:32,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:19:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:32,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:19:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:32,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:19:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:19:32,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:32,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120023318] [2021-11-20 07:19:32,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120023318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:32,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205213695] [2021-11-20 07:19:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:32,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:32,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:32,483 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:32,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:19:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:32,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 2461 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-20 07:19:32,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:33,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:19:33,184 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 19 treesize of output 1 [2021-11-20 07:19:33,928 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 07:19:33,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-11-20 07:19:34,247 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:19:34,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 07:19:36,830 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 07:19:36,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 56 [2021-11-20 07:19:36,930 INFO L354 Elim1Store]: treesize reduction 80, result has 17.5 percent of original size [2021-11-20 07:19:36,930 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 07:19:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:41,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:19:56,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205213695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:56,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:19:56,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2021-11-20 07:19:56,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616959876] [2021-11-20 07:19:56,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:19:56,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 07:19:56,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:56,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 07:19:56,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1117, Unknown=4, NotChecked=0, Total=1260 [2021-11-20 07:19:56,481 INFO L87 Difference]: Start difference. First operand 92 states and 122 transitions. Second operand has 32 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 11 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-20 07:20:08,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:08,756 INFO L93 Difference]: Finished difference Result 301 states and 428 transitions. [2021-11-20 07:20:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 07:20:08,760 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 11 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 10 states have call successors, (12) Word has length 57 [2021-11-20 07:20:08,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:08,764 INFO L225 Difference]: With dead ends: 301 [2021-11-20 07:20:08,765 INFO L226 Difference]: Without dead ends: 231 [2021-11-20 07:20:08,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=249, Invalid=1997, Unknown=10, NotChecked=0, Total=2256 [2021-11-20 07:20:08,771 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 150 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 842 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:08,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 2361 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 982 Invalid, 0 Unknown, 842 Unchecked, 1.3s Time] [2021-11-20 07:20:08,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-20 07:20:08,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2021-11-20 07:20:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 95 states have (on average 1.2) internal successors, (114), 100 states have internal predecessors, (114), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (39), 27 states have call predecessors, (39), 29 states have call successors, (39) [2021-11-20 07:20:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2021-11-20 07:20:08,820 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 57 [2021-11-20 07:20:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:08,825 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2021-11-20 07:20:08,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 11 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-20 07:20:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2021-11-20 07:20:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:20:08,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:08,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:08,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:20:09,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:09,048 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:09,048 INFO L85 PathProgramCache]: Analyzing trace with hash 259191797, now seen corresponding path program 1 times [2021-11-20 07:20:09,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:09,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340136801] [2021-11-20 07:20:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:09,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:09,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:09,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:20:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:09,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:09,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:20:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:09,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:20:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:09,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:20:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:20:09,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:09,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340136801] [2021-11-20 07:20:09,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340136801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:09,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699965836] [2021-11-20 07:20:09,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:09,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:09,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:09,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:09,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:20:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:13,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 2466 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 07:20:13,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:13,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:20:14,462 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 07:20:14,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-11-20 07:20:14,694 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:20:14,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 07:20:16,853 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 07:20:16,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 56 [2021-11-20 07:20:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:20:17,078 INFO L354 Elim1Store]: treesize reduction 241, result has 11.4 percent of original size [2021-11-20 07:20:17,079 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 5 case distinctions, treesize of input 104 treesize of output 73 [2021-11-20 07:20:17,108 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-11-20 07:20:17,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 74 treesize of output 63 [2021-11-20 07:20:18,647 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_aws_byte_cursor_advance_~len#1_74| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:20:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:18,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:20:31,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699965836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:31,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:20:31,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-11-20 07:20:31,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011949604] [2021-11-20 07:20:31,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:20:31,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 07:20:31,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:31,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 07:20:31,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1252, Unknown=5, NotChecked=0, Total=1406 [2021-11-20 07:20:31,437 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 33 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 10 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-20 07:20:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:38,293 INFO L93 Difference]: Finished difference Result 268 states and 380 transitions. [2021-11-20 07:20:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 07:20:38,294 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 10 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 9 states have call successors, (12) Word has length 57 [2021-11-20 07:20:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:38,298 INFO L225 Difference]: With dead ends: 268 [2021-11-20 07:20:38,298 INFO L226 Difference]: Without dead ends: 201 [2021-11-20 07:20:38,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=291, Invalid=2564, Unknown=7, NotChecked=0, Total=2862 [2021-11-20 07:20:38,301 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 100 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 847 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:38,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1680 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 851 Invalid, 0 Unknown, 847 Unchecked, 1.5s Time] [2021-11-20 07:20:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-20 07:20:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 153. [2021-11-20 07:20:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 108 states have internal predecessors, (127), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (44), 31 states have call predecessors, (44), 33 states have call successors, (44) [2021-11-20 07:20:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 207 transitions. [2021-11-20 07:20:38,341 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 207 transitions. Word has length 57 [2021-11-20 07:20:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:38,342 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 207 transitions. [2021-11-20 07:20:38,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 10 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-20 07:20:38,342 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 207 transitions. [2021-11-20 07:20:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 07:20:38,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:38,345 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:20:38,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 07:20:38,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:38,560 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:38,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1565075525, now seen corresponding path program 2 times [2021-11-20 07:20:38,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:38,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036901475] [2021-11-20 07:20:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:38,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:38,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:38,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:20:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:38,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:38,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:20:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:38,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 07:20:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:38,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:20:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 07:20:38,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:38,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036901475] [2021-11-20 07:20:38,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036901475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:38,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553550165] [2021-11-20 07:20:38,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:20:38,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:38,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:38,973 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:38,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:20:40,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:20:40,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:20:40,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 07:20:40,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:40,781 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 19 treesize of output 1 [2021-11-20 07:20:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:41,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:20:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:20:42,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553550165] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:20:42,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:20:42,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 10] total 27 [2021-11-20 07:20:42,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856971311] [2021-11-20 07:20:42,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:20:42,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:20:42,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:42,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:20:42,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:20:42,244 INFO L87 Difference]: Start difference. First operand 153 states and 207 transitions. Second operand has 27 states, 24 states have (on average 3.875) internal successors, (93), 26 states have internal predecessors, (93), 9 states have call successors, (16), 3 states have call predecessors, (16), 8 states have return successors, (16), 6 states have call predecessors, (16), 9 states have call successors, (16) [2021-11-20 07:20:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:45,302 INFO L93 Difference]: Finished difference Result 345 states and 510 transitions. [2021-11-20 07:20:45,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 07:20:45,303 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.875) internal successors, (93), 26 states have internal predecessors, (93), 9 states have call successors, (16), 3 states have call predecessors, (16), 8 states have return successors, (16), 6 states have call predecessors, (16), 9 states have call successors, (16) Word has length 61 [2021-11-20 07:20:45,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:45,307 INFO L225 Difference]: With dead ends: 345 [2021-11-20 07:20:45,307 INFO L226 Difference]: Without dead ends: 265 [2021-11-20 07:20:45,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=347, Invalid=2409, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 07:20:45,310 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 190 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:45,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1641 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1568 Invalid, 0 Unknown, 220 Unchecked, 1.9s Time] [2021-11-20 07:20:45,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-20 07:20:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 167. [2021-11-20 07:20:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 119 states have internal predecessors, (137), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (50), 33 states have call predecessors, (50), 35 states have call successors, (50) [2021-11-20 07:20:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2021-11-20 07:20:45,342 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 225 transitions. Word has length 61 [2021-11-20 07:20:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:45,343 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 225 transitions. [2021-11-20 07:20:45,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.875) internal successors, (93), 26 states have internal predecessors, (93), 9 states have call successors, (16), 3 states have call predecessors, (16), 8 states have return successors, (16), 6 states have call predecessors, (16), 9 states have call successors, (16) [2021-11-20 07:20:45,343 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 225 transitions. [2021-11-20 07:20:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:20:45,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:45,345 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:45,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 07:20:45,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:20:45,556 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1300919918, now seen corresponding path program 1 times [2021-11-20 07:20:45,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:45,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788511046] [2021-11-20 07:20:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:45,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:45,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:45,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:20:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:45,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:45,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:20:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:45,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:20:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:45,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 07:20:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:45,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 07:20:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 07:20:45,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:45,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788511046] [2021-11-20 07:20:45,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788511046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:45,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:45,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:20:45,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883266927] [2021-11-20 07:20:45,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:45,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:20:45,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:45,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:20:45,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:20:45,951 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 07:20:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:46,284 INFO L93 Difference]: Finished difference Result 280 states and 394 transitions. [2021-11-20 07:20:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:20:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-11-20 07:20:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:46,295 INFO L225 Difference]: With dead ends: 280 [2021-11-20 07:20:46,295 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 07:20:46,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:20:46,298 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 38 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:46,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 392 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:20:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 07:20:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 162. [2021-11-20 07:20:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 111 states have (on average 1.1891891891891893) internal successors, (132), 115 states have internal predecessors, (132), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (47), 32 states have call predecessors, (47), 33 states have call successors, (47) [2021-11-20 07:20:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 215 transitions. [2021-11-20 07:20:46,344 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 215 transitions. Word has length 64 [2021-11-20 07:20:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:46,345 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 215 transitions. [2021-11-20 07:20:46,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 07:20:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 215 transitions. [2021-11-20 07:20:46,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 07:20:46,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:46,347 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:46,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:20:46,348 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:46,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:46,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1118956732, now seen corresponding path program 1 times [2021-11-20 07:20:46,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:46,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972602440] [2021-11-20 07:20:46,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:46,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:46,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:46,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:20:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:46,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:46,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:20:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:46,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:20:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:46,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:20:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:46,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:20:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:46,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:20:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:20:46,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:46,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972602440] [2021-11-20 07:20:46,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972602440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:46,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:46,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:20:46,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204349266] [2021-11-20 07:20:46,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:46,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:20:46,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:46,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:20:46,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:20:46,688 INFO L87 Difference]: Start difference. First operand 162 states and 215 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 07:20:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:46,758 INFO L93 Difference]: Finished difference Result 217 states and 283 transitions. [2021-11-20 07:20:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:20:46,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2021-11-20 07:20:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:46,761 INFO L225 Difference]: With dead ends: 217 [2021-11-20 07:20:46,762 INFO L226 Difference]: Without dead ends: 162 [2021-11-20 07:20:46,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:20:46,765 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 17 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:46,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 284 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:20:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-20 07:20:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-11-20 07:20:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 111 states have (on average 1.1891891891891893) internal successors, (132), 115 states have internal predecessors, (132), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (46), 32 states have call predecessors, (46), 33 states have call successors, (46) [2021-11-20 07:20:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 214 transitions. [2021-11-20 07:20:46,797 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 214 transitions. Word has length 65 [2021-11-20 07:20:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:46,797 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 214 transitions. [2021-11-20 07:20:46,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 07:20:46,798 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 214 transitions. [2021-11-20 07:20:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:20:46,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:46,800 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:46,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:20:46,801 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1635963807, now seen corresponding path program 1 times [2021-11-20 07:20:46,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:46,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634525093] [2021-11-20 07:20:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:46,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:20:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:20:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:20:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:20:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:20:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:20:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 07:20:47,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:47,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634525093] [2021-11-20 07:20:47,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634525093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:47,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:47,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:20:47,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364076392] [2021-11-20 07:20:47,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:47,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:20:47,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:20:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:20:47,205 INFO L87 Difference]: Start difference. First operand 162 states and 214 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 07:20:47,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:47,308 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2021-11-20 07:20:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:20:47,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 67 [2021-11-20 07:20:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:47,312 INFO L225 Difference]: With dead ends: 170 [2021-11-20 07:20:47,312 INFO L226 Difference]: Without dead ends: 168 [2021-11-20 07:20:47,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:20:47,313 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 16 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:47,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 699 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:20:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-20 07:20:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-11-20 07:20:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 118 states have internal predecessors, (135), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (47), 33 states have call predecessors, (47), 34 states have call successors, (47) [2021-11-20 07:20:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 219 transitions. [2021-11-20 07:20:47,338 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 219 transitions. Word has length 67 [2021-11-20 07:20:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:47,340 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 219 transitions. [2021-11-20 07:20:47,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 07:20:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 219 transitions. [2021-11-20 07:20:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:20:47,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:47,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:47,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:20:47,351 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash -887007749, now seen corresponding path program 1 times [2021-11-20 07:20:47,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:47,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847749572] [2021-11-20 07:20:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:47,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:20:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:20:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:47,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 07:20:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:48,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 07:20:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:48,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:48,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 07:20:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:48,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:20:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:20:48,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:48,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847749572] [2021-11-20 07:20:48,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847749572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:48,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733194825] [2021-11-20 07:20:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:48,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:48,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:48,437 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:48,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:20:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:48,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 2499 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 07:20:48,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:49,210 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 18 treesize of output 14 [2021-11-20 07:20:50,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:20:50,056 INFO L354 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2021-11-20 07:20:50,056 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 3 case distinctions, treesize of input 59 treesize of output 48 [2021-11-20 07:20:50,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:20:50,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:20:50,082 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-11-20 07:20:50,083 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 46 treesize of output 34 [2021-11-20 07:20:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:20:50,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:20:50,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733194825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:50,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:20:50,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 29 [2021-11-20 07:20:50,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215306089] [2021-11-20 07:20:50,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:50,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:20:50,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:50,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:20:50,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:20:50,644 INFO L87 Difference]: Start difference. First operand 167 states and 219 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 07:20:51,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:51,112 INFO L93 Difference]: Finished difference Result 318 states and 432 transitions. [2021-11-20 07:20:51,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:20:51,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 68 [2021-11-20 07:20:51,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:51,117 INFO L225 Difference]: With dead ends: 318 [2021-11-20 07:20:51,118 INFO L226 Difference]: Without dead ends: 252 [2021-11-20 07:20:51,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:20:51,121 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 62 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:51,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1135 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 178 Invalid, 0 Unknown, 233 Unchecked, 0.3s Time] [2021-11-20 07:20:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-20 07:20:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 217. [2021-11-20 07:20:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 154 states have (on average 1.2012987012987013) internal successors, (185), 159 states have internal predecessors, (185), 42 states have call successors, (42), 18 states have call predecessors, (42), 20 states have return successors, (59), 39 states have call predecessors, (59), 39 states have call successors, (59) [2021-11-20 07:20:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 286 transitions. [2021-11-20 07:20:51,155 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 286 transitions. Word has length 68 [2021-11-20 07:20:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:51,156 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 286 transitions. [2021-11-20 07:20:51,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 07:20:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 286 transitions. [2021-11-20 07:20:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:20:51,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:51,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:51,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:20:51,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 07:20:51,388 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:51,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:51,388 INFO L85 PathProgramCache]: Analyzing trace with hash -628842311, now seen corresponding path program 1 times [2021-11-20 07:20:51,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:51,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488865953] [2021-11-20 07:20:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:51,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:51,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:51,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:20:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:51,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:20:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:51,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 07:20:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:51,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 07:20:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:51,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:51,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 07:20:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:51,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:20:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 07:20:51,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:51,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488865953] [2021-11-20 07:20:51,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488865953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:51,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:51,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:20:51,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323748013] [2021-11-20 07:20:51,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:51,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:20:51,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:51,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:20:51,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:20:51,732 INFO L87 Difference]: Start difference. First operand 217 states and 286 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 07:20:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:52,071 INFO L93 Difference]: Finished difference Result 359 states and 497 transitions. [2021-11-20 07:20:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:20:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 68 [2021-11-20 07:20:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:52,075 INFO L225 Difference]: With dead ends: 359 [2021-11-20 07:20:52,075 INFO L226 Difference]: Without dead ends: 210 [2021-11-20 07:20:52,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:52,078 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 39 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:52,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 254 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:20:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-20 07:20:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2021-11-20 07:20:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 148 states have (on average 1.1891891891891893) internal successors, (176), 152 states have internal predecessors, (176), 42 states have call successors, (42), 18 states have call predecessors, (42), 19 states have return successors, (57), 39 states have call predecessors, (57), 39 states have call successors, (57) [2021-11-20 07:20:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 275 transitions. [2021-11-20 07:20:52,108 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 275 transitions. Word has length 68 [2021-11-20 07:20:52,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:52,109 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 275 transitions. [2021-11-20 07:20:52,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 07:20:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 275 transitions. [2021-11-20 07:20:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:20:52,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:52,112 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:52,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:20:52,112 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:52,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:52,113 INFO L85 PathProgramCache]: Analyzing trace with hash 665088200, now seen corresponding path program 1 times [2021-11-20 07:20:52,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:52,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016834223] [2021-11-20 07:20:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:52,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:52,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:52,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:20:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:52,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-20 07:20:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:52,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 07:20:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:52,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:20:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:52,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:20:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:20:52,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016834223] [2021-11-20 07:20:52,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016834223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:52,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094474609] [2021-11-20 07:20:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:52,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:52,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:52,441 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:52,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:20:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:52,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 2490 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:20:52,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:20:53,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:20:53,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094474609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:53,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:20:53,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-11-20 07:20:53,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486821246] [2021-11-20 07:20:53,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:53,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:20:53,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:53,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:20:53,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:20:53,142 INFO L87 Difference]: Start difference. First operand 210 states and 275 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:20:53,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:53,387 INFO L93 Difference]: Finished difference Result 339 states and 456 transitions. [2021-11-20 07:20:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:20:53,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2021-11-20 07:20:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:53,390 INFO L225 Difference]: With dead ends: 339 [2021-11-20 07:20:53,390 INFO L226 Difference]: Without dead ends: 200 [2021-11-20 07:20:53,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:20:53,392 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 15 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:53,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 326 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2021-11-20 07:20:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-20 07:20:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-11-20 07:20:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 143 states have internal predecessors, (163), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (53), 37 states have call predecessors, (53), 38 states have call successors, (53) [2021-11-20 07:20:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 257 transitions. [2021-11-20 07:20:53,416 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 257 transitions. Word has length 67 [2021-11-20 07:20:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:53,417 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 257 transitions. [2021-11-20 07:20:53,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:20:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 257 transitions. [2021-11-20 07:20:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:20:53,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:53,421 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:53,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:20:53,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:53,648 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1366688074, now seen corresponding path program 1 times [2021-11-20 07:20:53,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:53,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530060153] [2021-11-20 07:20:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:53,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:53,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:53,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:20:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:53,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-20 07:20:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:53,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 07:20:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:53,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:20:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:53,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:20:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:20:53,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:53,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530060153] [2021-11-20 07:20:53,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530060153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:53,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486696964] [2021-11-20 07:20:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:53,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:53,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:53,994 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:53,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:20:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:54,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 2495 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 07:20:54,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:20:54,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:20:54,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486696964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:54,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:20:54,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-20 07:20:54,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213730685] [2021-11-20 07:20:54,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:54,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:20:54,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:54,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:20:54,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:20:54,628 INFO L87 Difference]: Start difference. First operand 199 states and 257 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:20:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:54,801 INFO L93 Difference]: Finished difference Result 322 states and 418 transitions. [2021-11-20 07:20:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:20:54,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 67 [2021-11-20 07:20:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:54,804 INFO L225 Difference]: With dead ends: 322 [2021-11-20 07:20:54,805 INFO L226 Difference]: Without dead ends: 189 [2021-11-20 07:20:54,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:20:54,807 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 10 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:54,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 776 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:20:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-20 07:20:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-11-20 07:20:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 132 states have (on average 1.1666666666666667) internal successors, (154), 135 states have internal predecessors, (154), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (48), 35 states have call predecessors, (48), 36 states have call successors, (48) [2021-11-20 07:20:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 241 transitions. [2021-11-20 07:20:54,832 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 241 transitions. Word has length 67 [2021-11-20 07:20:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:54,833 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 241 transitions. [2021-11-20 07:20:54,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:20:54,833 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 241 transitions. [2021-11-20 07:20:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:20:54,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:54,835 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:54,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 07:20:55,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:55,052 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash 425129218, now seen corresponding path program 1 times [2021-11-20 07:20:55,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:55,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188898600] [2021-11-20 07:20:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:55,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:20:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:20:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 07:20:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 07:20:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 07:20:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:20:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:20:55,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:55,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188898600] [2021-11-20 07:20:55,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188898600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:55,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:55,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 07:20:55,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111173244] [2021-11-20 07:20:55,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:55,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:20:55,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:55,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:20:55,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:20:55,568 INFO L87 Difference]: Start difference. First operand 189 states and 241 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 07:20:56,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:56,449 INFO L93 Difference]: Finished difference Result 197 states and 249 transitions. [2021-11-20 07:20:56,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:20:56,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2021-11-20 07:20:56,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:56,452 INFO L225 Difference]: With dead ends: 197 [2021-11-20 07:20:56,453 INFO L226 Difference]: Without dead ends: 195 [2021-11-20 07:20:56,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:20:56,454 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 62 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:56,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 877 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:20:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-20 07:20:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 189. [2021-11-20 07:20:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 132 states have (on average 1.1666666666666667) internal successors, (154), 135 states have internal predecessors, (154), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (48), 35 states have call predecessors, (48), 36 states have call successors, (48) [2021-11-20 07:20:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 241 transitions. [2021-11-20 07:20:56,479 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 241 transitions. Word has length 70 [2021-11-20 07:20:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:56,480 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 241 transitions. [2021-11-20 07:20:56,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 07:20:56,480 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 241 transitions. [2021-11-20 07:20:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 07:20:56,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:56,482 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-20 07:20:56,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:20:56,483 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash -999155823, now seen corresponding path program 2 times [2021-11-20 07:20:56,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:56,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522723937] [2021-11-20 07:20:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:56,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:57,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:20:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:57,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:20:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:57,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:20:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:57,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:20:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:57,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 07:20:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 07:20:57,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:57,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522723937] [2021-11-20 07:20:57,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522723937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:57,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491162688] [2021-11-20 07:20:57,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:20:57,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:57,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:57,808 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:57,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:20:59,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:20:59,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:20:59,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 2505 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 07:20:59,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:59,222 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 [2021-11-20 07:20:59,228 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 [2021-11-20 07:21:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:21:00,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:21:00,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491162688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:21:00,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:21:00,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 23 [2021-11-20 07:21:00,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582200281] [2021-11-20 07:21:00,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:21:00,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:21:00,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:21:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:21:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:21:00,058 INFO L87 Difference]: Start difference. First operand 189 states and 241 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:21:00,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:00,206 INFO L93 Difference]: Finished difference Result 305 states and 397 transitions. [2021-11-20 07:21:00,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:21:00,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 69 [2021-11-20 07:21:00,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:00,209 INFO L225 Difference]: With dead ends: 305 [2021-11-20 07:21:00,209 INFO L226 Difference]: Without dead ends: 205 [2021-11-20 07:21:00,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:21:00,212 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 46 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:00,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 640 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2021-11-20 07:21:00,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-20 07:21:00,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 180. [2021-11-20 07:21:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 126 states have (on average 1.1507936507936507) internal successors, (145), 130 states have internal predecessors, (145), 36 states have call successors, (36), 18 states have call predecessors, (36), 17 states have return successors, (43), 31 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-20 07:21:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 224 transitions. [2021-11-20 07:21:00,235 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 224 transitions. Word has length 69 [2021-11-20 07:21:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:21:00,235 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 224 transitions. [2021-11-20 07:21:00,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:21:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 224 transitions. [2021-11-20 07:21:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 07:21:00,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:00,238 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:21:00,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:21:00,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:21:00,460 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:21:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1153679959, now seen corresponding path program 1 times [2021-11-20 07:21:00,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:21:00,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371545313] [2021-11-20 07:21:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:00,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:21:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:00,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:21:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:00,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:21:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:00,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:21:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:00,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:21:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:00,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:21:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:00,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:21:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:00,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:21:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:00,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:21:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:21:00,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:21:00,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371545313] [2021-11-20 07:21:00,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371545313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:21:00,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:21:00,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:21:00,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070064646] [2021-11-20 07:21:00,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:21:00,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:21:00,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:21:00,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:21:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:21:00,795 INFO L87 Difference]: Start difference. First operand 180 states and 224 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 07:21:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:01,061 INFO L93 Difference]: Finished difference Result 243 states and 308 transitions. [2021-11-20 07:21:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:21:01,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2021-11-20 07:21:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:01,064 INFO L225 Difference]: With dead ends: 243 [2021-11-20 07:21:01,065 INFO L226 Difference]: Without dead ends: 188 [2021-11-20 07:21:01,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:21:01,066 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 40 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:01,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 365 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:21:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-20 07:21:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2021-11-20 07:21:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 127 states have (on average 1.1496062992125984) internal successors, (146), 133 states have internal predecessors, (146), 41 states have call successors, (41), 18 states have call predecessors, (41), 17 states have return successors, (50), 34 states have call predecessors, (50), 38 states have call successors, (50) [2021-11-20 07:21:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 237 transitions. [2021-11-20 07:21:01,088 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 237 transitions. Word has length 71 [2021-11-20 07:21:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:21:01,088 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 237 transitions. [2021-11-20 07:21:01,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 07:21:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 237 transitions. [2021-11-20 07:21:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 07:21:01,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:01,091 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:21:01,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:21:01,091 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:21:01,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:01,092 INFO L85 PathProgramCache]: Analyzing trace with hash -452080085, now seen corresponding path program 1 times [2021-11-20 07:21:01,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:21:01,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683651319] [2021-11-20 07:21:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:01,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:21:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:21:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:21:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:21:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:21:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:21:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:21:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:21:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:21:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 07:21:02,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:21:02,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683651319] [2021-11-20 07:21:02,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683651319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:21:02,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757486981] [2021-11-20 07:21:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:02,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:21:02,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:21:02,063 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:21:02,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:21:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:02,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 2498 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-20 07:21:02,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:21:03,740 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 44 treesize of output 28 [2021-11-20 07:21:03,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:21:03,886 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 103 treesize of output 66 [2021-11-20 07:21:03,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:21:03,925 INFO L354 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2021-11-20 07:21:03,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 67 [2021-11-20 07:21:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:21:39,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:21:40,488 INFO L354 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2021-11-20 07:21:40,488 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 1 case distinctions, treesize of input 100 treesize of output 84 [2021-11-20 07:21:40,497 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-20 07:21:40,497 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 91 treesize of output 67 [2021-11-20 07:21:41,176 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 35 treesize of output 27 [2021-11-20 07:21:41,462 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-20 07:21:41,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 27 [2021-11-20 07:21:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:21:41,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757486981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:21:41,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:21:41,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 18] total 42 [2021-11-20 07:21:41,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878566338] [2021-11-20 07:21:41,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:21:41,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 07:21:41,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:21:41,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 07:21:41,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1539, Unknown=8, NotChecked=0, Total=1722 [2021-11-20 07:21:41,552 INFO L87 Difference]: Start difference. First operand 186 states and 237 transitions. Second operand has 42 states, 38 states have (on average 2.710526315789474) internal successors, (103), 42 states have internal predecessors, (103), 13 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2021-11-20 07:22:01,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:01,737 INFO L93 Difference]: Finished difference Result 420 states and 582 transitions. [2021-11-20 07:22:01,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 07:22:01,737 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 2.710526315789474) internal successors, (103), 42 states have internal predecessors, (103), 13 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) Word has length 71 [2021-11-20 07:22:01,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:01,740 INFO L225 Difference]: With dead ends: 420 [2021-11-20 07:22:01,741 INFO L226 Difference]: Without dead ends: 314 [2021-11-20 07:22:01,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 124 SyntacticMatches, 17 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=473, Invalid=3933, Unknown=16, NotChecked=0, Total=4422 [2021-11-20 07:22:01,745 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 206 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 2220 SdHoareTripleChecker+Invalid, 2384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:01,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 2220 Invalid, 2384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1814 Invalid, 0 Unknown, 353 Unchecked, 2.7s Time] [2021-11-20 07:22:01,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-20 07:22:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 208. [2021-11-20 07:22:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 145 states have (on average 1.1448275862068966) internal successors, (166), 150 states have internal predecessors, (166), 41 states have call successors, (41), 21 states have call predecessors, (41), 21 states have return successors, (49), 36 states have call predecessors, (49), 38 states have call successors, (49) [2021-11-20 07:22:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 256 transitions. [2021-11-20 07:22:01,774 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 256 transitions. Word has length 71 [2021-11-20 07:22:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:01,775 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 256 transitions. [2021-11-20 07:22:01,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 2.710526315789474) internal successors, (103), 42 states have internal predecessors, (103), 13 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2021-11-20 07:22:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 256 transitions. [2021-11-20 07:22:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 07:22:01,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:01,777 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 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] [2021-11-20 07:22:01,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:22:02,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:22:02,004 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:02,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1701555945, now seen corresponding path program 1 times [2021-11-20 07:22:02,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:02,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751176986] [2021-11-20 07:22:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:02,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:22:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:22:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:22:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:22:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:22:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:22:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:22:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:22:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:22:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:22:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-20 07:22:02,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:02,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751176986] [2021-11-20 07:22:02,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751176986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:02,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:02,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:22:02,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138212029] [2021-11-20 07:22:02,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:02,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:22:02,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:02,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:22:02,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:22:02,242 INFO L87 Difference]: Start difference. First operand 208 states and 256 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 07:22:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:02,296 INFO L93 Difference]: Finished difference Result 234 states and 289 transitions. [2021-11-20 07:22:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:22:02,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 80 [2021-11-20 07:22:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:02,299 INFO L225 Difference]: With dead ends: 234 [2021-11-20 07:22:02,300 INFO L226 Difference]: Without dead ends: 205 [2021-11-20 07:22:02,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:22:02,302 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 26 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:02,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 336 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:22:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-20 07:22:02,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-11-20 07:22:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 147 states have internal predecessors, (163), 41 states have call successors, (41), 21 states have call predecessors, (41), 20 states have return successors, (48), 36 states have call predecessors, (48), 38 states have call successors, (48) [2021-11-20 07:22:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 252 transitions. [2021-11-20 07:22:02,326 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 252 transitions. Word has length 80 [2021-11-20 07:22:02,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:02,327 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 252 transitions. [2021-11-20 07:22:02,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 07:22:02,327 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 252 transitions. [2021-11-20 07:22:02,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 07:22:02,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:02,329 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2021-11-20 07:22:02,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 07:22:02,329 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1390033412, now seen corresponding path program 1 times [2021-11-20 07:22:02,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:02,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107891481] [2021-11-20 07:22:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:02,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:22:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:22:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:22:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:22:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:22:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:22:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:22:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:22:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:22:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:22:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 07:22:02,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:02,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107891481] [2021-11-20 07:22:02,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107891481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:02,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:02,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:22:02,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510495399] [2021-11-20 07:22:02,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:02,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:22:02,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:02,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:22:02,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:22:02,596 INFO L87 Difference]: Start difference. First operand 205 states and 252 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 07:22:02,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:02,688 INFO L93 Difference]: Finished difference Result 213 states and 260 transitions. [2021-11-20 07:22:02,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:22:02,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 82 [2021-11-20 07:22:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:02,691 INFO L225 Difference]: With dead ends: 213 [2021-11-20 07:22:02,691 INFO L226 Difference]: Without dead ends: 211 [2021-11-20 07:22:02,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:22:02,693 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 14 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:02,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 674 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:22:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-20 07:22:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2021-11-20 07:22:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 146 states have (on average 1.1369863013698631) internal successors, (166), 150 states have internal predecessors, (166), 42 states have call successors, (42), 22 states have call predecessors, (42), 21 states have return successors, (49), 37 states have call predecessors, (49), 39 states have call successors, (49) [2021-11-20 07:22:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 257 transitions. [2021-11-20 07:22:02,746 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 257 transitions. Word has length 82 [2021-11-20 07:22:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:02,746 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 257 transitions. [2021-11-20 07:22:02,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 07:22:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 257 transitions. [2021-11-20 07:22:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 07:22:02,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:02,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 07:22:02,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 07:22:02,749 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:02,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:02,749 INFO L85 PathProgramCache]: Analyzing trace with hash 716152983, now seen corresponding path program 1 times [2021-11-20 07:22:02,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:02,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583051290] [2021-11-20 07:22:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:02,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:03,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:22:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:03,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:22:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:03,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:22:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:03,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 07:22:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:03,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 07:22:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:03,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 07:22:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:03,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 07:22:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:03,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 07:22:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:22:03,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:03,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583051290] [2021-11-20 07:22:03,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583051290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:22:03,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160771793] [2021-11-20 07:22:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:03,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:22:03,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:22:03,379 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:22:03,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:22:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:03,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 2538 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 07:22:03,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:22:04,077 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 18 treesize of output 14 [2021-11-20 07:22:04,851 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 33 treesize of output 25 [2021-11-20 07:22:04,858 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 22 treesize of output 14 [2021-11-20 07:22:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:22:04,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:22:04,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160771793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:04,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:22:04,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15] total 28 [2021-11-20 07:22:04,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526091180] [2021-11-20 07:22:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:04,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:22:04,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:22:04,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:22:04,995 INFO L87 Difference]: Start difference. First operand 210 states and 257 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 11 states have internal predecessors, (54), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-20 07:22:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:05,673 INFO L93 Difference]: Finished difference Result 367 states and 459 transitions. [2021-11-20 07:22:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:22:05,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 11 states have internal predecessors, (54), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 80 [2021-11-20 07:22:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:05,676 INFO L225 Difference]: With dead ends: 367 [2021-11-20 07:22:05,676 INFO L226 Difference]: Without dead ends: 251 [2021-11-20 07:22:05,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:22:05,678 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 76 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:05,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 809 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 388 Invalid, 0 Unknown, 250 Unchecked, 0.5s Time] [2021-11-20 07:22:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-20 07:22:05,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 222. [2021-11-20 07:22:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 161 states have internal predecessors, (173), 42 states have call successors, (42), 23 states have call predecessors, (42), 24 states have return successors, (49), 37 states have call predecessors, (49), 39 states have call successors, (49) [2021-11-20 07:22:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2021-11-20 07:22:05,705 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 80 [2021-11-20 07:22:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:05,705 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2021-11-20 07:22:05,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 11 states have internal predecessors, (54), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-20 07:22:05,706 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2021-11-20 07:22:05,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 07:22:05,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:05,707 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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] [2021-11-20 07:22:05,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:22:05,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 07:22:05,936 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:05,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:05,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1172549180, now seen corresponding path program 1 times [2021-11-20 07:22:05,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:05,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802470849] [2021-11-20 07:22:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:05,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:22:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:22:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:22:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:22:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:22:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:22:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:22:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:22:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:22:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:22:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-20 07:22:06,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:06,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802470849] [2021-11-20 07:22:06,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802470849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:06,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:06,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:22:06,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768416149] [2021-11-20 07:22:06,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:06,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:22:06,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:22:06,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:22:06,267 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 07:22:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:06,734 INFO L93 Difference]: Finished difference Result 279 states and 350 transitions. [2021-11-20 07:22:06,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:22:06,736 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 86 [2021-11-20 07:22:06,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:06,739 INFO L225 Difference]: With dead ends: 279 [2021-11-20 07:22:06,739 INFO L226 Difference]: Without dead ends: 253 [2021-11-20 07:22:06,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:22:06,740 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 61 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:06,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 535 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:22:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-20 07:22:06,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 236. [2021-11-20 07:22:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 159 states have (on average 1.1132075471698113) internal successors, (177), 168 states have internal predecessors, (177), 52 states have call successors, (52), 23 states have call predecessors, (52), 24 states have return successors, (61), 44 states have call predecessors, (61), 49 states have call successors, (61) [2021-11-20 07:22:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 290 transitions. [2021-11-20 07:22:06,771 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 290 transitions. Word has length 86 [2021-11-20 07:22:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:06,772 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 290 transitions. [2021-11-20 07:22:06,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 07:22:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 290 transitions. [2021-11-20 07:22:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 07:22:06,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:06,774 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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] [2021-11-20 07:22:06,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 07:22:06,774 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash 755723522, now seen corresponding path program 1 times [2021-11-20 07:22:06,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:06,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171540994] [2021-11-20 07:22:06,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:06,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:22:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:22:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:22:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:22:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:22:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:22:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:22:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:06,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:22:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:07,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:22:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:07,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:22:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 07:22:07,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:07,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171540994] [2021-11-20 07:22:07,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171540994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:22:07,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695407427] [2021-11-20 07:22:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:07,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:22:07,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:22:07,184 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:22:07,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:22:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:07,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 2542 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 07:22:07,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:22:07,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:22:08,174 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 07:22:08,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-11-20 07:22:08,345 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:22:08,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 07:22:09,978 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-20 07:22:09,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 52 [2021-11-20 07:22:10,041 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-20 07:22:10,041 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 1 case distinctions, treesize of input 63 treesize of output 35 [2021-11-20 07:22:10,070 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 07:22:10,070 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 2 case distinctions, treesize of input 32 treesize of output 27 [2021-11-20 07:22:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:22:11,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:22:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 07:22:12,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695407427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:22:12,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:22:12,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20, 11] total 32 [2021-11-20 07:22:12,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197434908] [2021-11-20 07:22:12,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:22:12,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 07:22:12,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:12,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 07:22:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:22:12,436 INFO L87 Difference]: Start difference. First operand 236 states and 290 transitions. Second operand has 32 states, 30 states have (on average 3.4) internal successors, (102), 28 states have internal predecessors, (102), 10 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-20 07:22:15,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:15,012 INFO L93 Difference]: Finished difference Result 295 states and 370 transitions. [2021-11-20 07:22:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 07:22:15,013 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.4) internal successors, (102), 28 states have internal predecessors, (102), 10 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) Word has length 86 [2021-11-20 07:22:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:15,015 INFO L225 Difference]: With dead ends: 295 [2021-11-20 07:22:15,016 INFO L226 Difference]: Without dead ends: 261 [2021-11-20 07:22:15,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 161 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=249, Invalid=1642, Unknown=1, NotChecked=0, Total=1892 [2021-11-20 07:22:15,018 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 72 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:15,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1726 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 235 Unchecked, 0.3s Time] [2021-11-20 07:22:15,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-20 07:22:15,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 240. [2021-11-20 07:22:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 166 states have (on average 1.108433734939759) internal successors, (184), 172 states have internal predecessors, (184), 48 states have call successors, (48), 25 states have call predecessors, (48), 25 states have return successors, (55), 42 states have call predecessors, (55), 45 states have call successors, (55) [2021-11-20 07:22:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 287 transitions. [2021-11-20 07:22:15,049 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 287 transitions. Word has length 86 [2021-11-20 07:22:15,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:15,050 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 287 transitions. [2021-11-20 07:22:15,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.4) internal successors, (102), 28 states have internal predecessors, (102), 10 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-20 07:22:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 287 transitions. [2021-11-20 07:22:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 07:22:15,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:15,052 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 07:22:15,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:22:15,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:22:15,276 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:15,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1314150920, now seen corresponding path program 1 times [2021-11-20 07:22:15,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:15,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664363498] [2021-11-20 07:22:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:15,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:15,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:22:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:15,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:22:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:15,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:22:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:15,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 07:22:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:15,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 07:22:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:15,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 07:22:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:15,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:22:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:16,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:22:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:16,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:22:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 07:22:16,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:16,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664363498] [2021-11-20 07:22:16,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664363498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:22:16,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811517061] [2021-11-20 07:22:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:16,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:22:16,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:22:16,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:22:16,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:22:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:16,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 2559 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-20 07:22:16,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:22:16,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:22:17,006 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:22:17,007 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 [2021-11-20 07:22:17,120 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 27 treesize of output 23 [2021-11-20 07:22:17,127 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 [2021-11-20 07:22:17,728 INFO L354 Elim1Store]: treesize reduction 124, result has 22.5 percent of original size [2021-11-20 07:22:17,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 case distinctions, treesize of input 31 treesize of output 50 [2021-11-20 07:22:17,916 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 07:22:17,916 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 25 treesize of output 23 [2021-11-20 07:22:17,939 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 07:22:17,940 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 66 treesize of output 46 [2021-11-20 07:22:19,006 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-20 07:22:19,006 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 108 treesize of output 100 [2021-11-20 07:22:19,029 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-20 07:22:19,029 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 100 treesize of output 92 [2021-11-20 07:22:19,311 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:22:19,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 61 [2021-11-20 07:22:23,546 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 07:22:23,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 60 [2021-11-20 07:22:23,630 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-20 07:22:23,630 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 2 case distinctions, treesize of input 66 treesize of output 58 [2021-11-20 07:22:23,650 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-20 07:22:23,651 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 2 case distinctions, treesize of input 55 treesize of output 47 [2021-11-20 07:22:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 13 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:22:25,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:22:30,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811517061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:22:30,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:22:30,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 35] total 52 [2021-11-20 07:22:30,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930646837] [2021-11-20 07:22:30,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:22:30,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-20 07:22:30,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:30,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-20 07:22:30,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=3747, Unknown=2, NotChecked=0, Total=4032 [2021-11-20 07:22:30,810 INFO L87 Difference]: Start difference. First operand 240 states and 287 transitions. Second operand has 52 states, 48 states have (on average 2.5) internal successors, (120), 45 states have internal predecessors, (120), 13 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (18), 10 states have call predecessors, (18), 12 states have call successors, (18) [2021-11-20 07:23:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:09,887 INFO L93 Difference]: Finished difference Result 392 states and 487 transitions. [2021-11-20 07:23:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-20 07:23:09,891 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 48 states have (on average 2.5) internal successors, (120), 45 states have internal predecessors, (120), 13 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (18), 10 states have call predecessors, (18), 12 states have call successors, (18) Word has length 87 [2021-11-20 07:23:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:09,897 INFO L225 Difference]: With dead ends: 392 [2021-11-20 07:23:09,897 INFO L226 Difference]: Without dead ends: 324 [2021-11-20 07:23:09,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3466 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=661, Invalid=9406, Unknown=33, NotChecked=0, Total=10100 [2021-11-20 07:23:09,903 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 116 mSDsluCounter, 2018 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 2171 SdHoareTripleChecker+Invalid, 2964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1735 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:09,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 2171 Invalid, 2964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1152 Invalid, 0 Unknown, 1735 Unchecked, 1.1s Time] [2021-11-20 07:23:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-20 07:23:09,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 264. [2021-11-20 07:23:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 187 states have (on average 1.1122994652406417) internal successors, (208), 193 states have internal predecessors, (208), 49 states have call successors, (49), 28 states have call predecessors, (49), 27 states have return successors, (57), 42 states have call predecessors, (57), 46 states have call successors, (57) [2021-11-20 07:23:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 314 transitions. [2021-11-20 07:23:09,949 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 314 transitions. Word has length 87 [2021-11-20 07:23:09,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:09,950 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 314 transitions. [2021-11-20 07:23:09,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 48 states have (on average 2.5) internal successors, (120), 45 states have internal predecessors, (120), 13 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (18), 10 states have call predecessors, (18), 12 states have call successors, (18) [2021-11-20 07:23:09,950 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 314 transitions. [2021-11-20 07:23:09,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 07:23:09,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:09,953 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 07:23:09,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:23:10,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 07:23:10,176 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash -274196982, now seen corresponding path program 1 times [2021-11-20 07:23:10,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:10,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309269869] [2021-11-20 07:23:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:10,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:11,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:11,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:23:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:11,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:23:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:11,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 07:23:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:11,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 07:23:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:11,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 07:23:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:11,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:23:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:11,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:23:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:11,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:23:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 07:23:11,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:11,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309269869] [2021-11-20 07:23:11,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309269869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:11,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825628445] [2021-11-20 07:23:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:11,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:23:11,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:23:11,778 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:23:11,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:23:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:12,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 2564 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-20 07:23:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:23:12,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:23:12,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-20 07:23:12,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:23:12,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 07:23:12,575 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 28 treesize of output 24 [2021-11-20 07:23:13,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:23:13,168 INFO L354 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2021-11-20 07:23:13,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2021-11-20 07:23:13,252 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 47 treesize of output 23 [2021-11-20 07:23:21,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:23:21,721 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-20 07:23:21,723 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 51 treesize of output 27 [2021-11-20 07:23:49,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:23:49,819 INFO L354 Elim1Store]: treesize reduction 41, result has 24.1 percent of original size [2021-11-20 07:23:49,819 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 3 case distinctions, treesize of input 68 treesize of output 55 [2021-11-20 07:23:49,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:23:49,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:23:49,830 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:23:49,830 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 2 case distinctions, treesize of input 57 treesize of output 29 [2021-11-20 07:23:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:23:56,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:23:58,765 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| Int) (v_DerPreprocessor_9 Int) (v_DerPreprocessor_8 Int)) (not (= (let ((.cse1 (+ 8 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|))) (select (store (let ((.cse0 (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base|) (+ |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset| 8) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) .cse1)) |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset| v_DerPreprocessor_8)) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|))) (store .cse0 .cse1 (select .cse0 .cse1))) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset| v_DerPreprocessor_9) .cse1)) 0))) is different from false [2021-11-20 07:24:00,574 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| Int) (v_DerPreprocessor_9 Int) (v_DerPreprocessor_8 Int)) (not (= (let ((.cse1 (+ 8 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|))) (select (store (let ((.cse0 (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base|) 8 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) .cse1)) 0 v_DerPreprocessor_8)) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|))) (store .cse0 .cse1 (select .cse0 .cse1))) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset| v_DerPreprocessor_9) .cse1)) 0))) is different from false [2021-11-20 07:24:00,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825628445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:24:00,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:24:00,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 39 [2021-11-20 07:24:00,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907652020] [2021-11-20 07:24:00,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:24:00,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 07:24:00,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:00,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 07:24:00,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1740, Unknown=6, NotChecked=170, Total=2070 [2021-11-20 07:24:00,587 INFO L87 Difference]: Start difference. First operand 264 states and 314 transitions. Second operand has 39 states, 37 states have (on average 3.081081081081081) internal successors, (114), 35 states have internal predecessors, (114), 12 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-20 07:24:07,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:07,157 INFO L93 Difference]: Finished difference Result 363 states and 428 transitions. [2021-11-20 07:24:07,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 07:24:07,158 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 3.081081081081081) internal successors, (114), 35 states have internal predecessors, (114), 12 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) Word has length 87 [2021-11-20 07:24:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:07,160 INFO L225 Difference]: With dead ends: 363 [2021-11-20 07:24:07,160 INFO L226 Difference]: Without dead ends: 287 [2021-11-20 07:24:07,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 104 SyntacticMatches, 11 SemanticMatches, 83 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 52.5s TimeCoverageRelationStatistics Valid=528, Invalid=6279, Unknown=7, NotChecked=326, Total=7140 [2021-11-20 07:24:07,164 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 87 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 2622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:07,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1063 Invalid, 2622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1893 Invalid, 0 Unknown, 654 Unchecked, 1.6s Time] [2021-11-20 07:24:07,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-20 07:24:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 275. [2021-11-20 07:24:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 198 states have (on average 1.106060606060606) internal successors, (219), 205 states have internal predecessors, (219), 47 states have call successors, (47), 29 states have call predecessors, (47), 29 states have return successors, (50), 40 states have call predecessors, (50), 44 states have call successors, (50) [2021-11-20 07:24:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 316 transitions. [2021-11-20 07:24:07,198 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 316 transitions. Word has length 87 [2021-11-20 07:24:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:07,199 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 316 transitions. [2021-11-20 07:24:07,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 3.081081081081081) internal successors, (114), 35 states have internal predecessors, (114), 12 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-20 07:24:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 316 transitions. [2021-11-20 07:24:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 07:24:07,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:07,201 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2021-11-20 07:24:07,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:24:07,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 07:24:07,428 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:07,428 INFO L85 PathProgramCache]: Analyzing trace with hash -253022058, now seen corresponding path program 1 times [2021-11-20 07:24:07,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:07,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285212263] [2021-11-20 07:24:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:07,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:24:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:24:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:24:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:24:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:24:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:24:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:24:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:24:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:24:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 07:24:07,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:07,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285212263] [2021-11-20 07:24:07,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285212263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:07,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:24:07,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:24:07,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593778232] [2021-11-20 07:24:07,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:07,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:24:07,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:07,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:24:07,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:24:07,628 INFO L87 Difference]: Start difference. First operand 275 states and 316 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 07:24:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:07,661 INFO L93 Difference]: Finished difference Result 289 states and 333 transitions. [2021-11-20 07:24:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:24:07,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 90 [2021-11-20 07:24:07,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:07,663 INFO L225 Difference]: With dead ends: 289 [2021-11-20 07:24:07,664 INFO L226 Difference]: Without dead ends: 276 [2021-11-20 07:24:07,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:24:07,665 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:07,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:24:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-20 07:24:07,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2021-11-20 07:24:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 199 states have (on average 1.1055276381909547) internal successors, (220), 206 states have internal predecessors, (220), 47 states have call successors, (47), 29 states have call predecessors, (47), 29 states have return successors, (50), 40 states have call predecessors, (50), 44 states have call successors, (50) [2021-11-20 07:24:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 317 transitions. [2021-11-20 07:24:07,702 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 317 transitions. Word has length 90 [2021-11-20 07:24:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:07,702 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 317 transitions. [2021-11-20 07:24:07,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 07:24:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 317 transitions. [2021-11-20 07:24:07,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 07:24:07,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:07,705 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2021-11-20 07:24:07,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 07:24:07,706 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:07,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:07,706 INFO L85 PathProgramCache]: Analyzing trace with hash -266130098, now seen corresponding path program 1 times [2021-11-20 07:24:07,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:07,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996600140] [2021-11-20 07:24:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:07,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:24:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:24:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:24:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:24:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:24:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:24:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:24:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:24:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:07,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:24:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 07:24:08,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:08,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996600140] [2021-11-20 07:24:08,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996600140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:08,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:24:08,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:24:08,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345835161] [2021-11-20 07:24:08,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:08,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:24:08,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:08,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:24:08,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:24:08,005 INFO L87 Difference]: Start difference. First operand 276 states and 317 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 07:24:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:08,337 INFO L93 Difference]: Finished difference Result 319 states and 380 transitions. [2021-11-20 07:24:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:24:08,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 90 [2021-11-20 07:24:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:08,340 INFO L225 Difference]: With dead ends: 319 [2021-11-20 07:24:08,340 INFO L226 Difference]: Without dead ends: 317 [2021-11-20 07:24:08,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:24:08,341 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 24 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:08,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 715 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:24:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-20 07:24:08,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 305. [2021-11-20 07:24:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 213 states have (on average 1.107981220657277) internal successors, (236), 222 states have internal predecessors, (236), 61 states have call successors, (61), 30 states have call predecessors, (61), 30 states have return successors, (65), 52 states have call predecessors, (65), 58 states have call successors, (65) [2021-11-20 07:24:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 362 transitions. [2021-11-20 07:24:08,382 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 362 transitions. Word has length 90 [2021-11-20 07:24:08,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:08,383 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 362 transitions. [2021-11-20 07:24:08,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 07:24:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 362 transitions. [2021-11-20 07:24:08,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 07:24:08,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:08,385 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2021-11-20 07:24:08,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 07:24:08,385 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:08,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:08,386 INFO L85 PathProgramCache]: Analyzing trace with hash -195763756, now seen corresponding path program 1 times [2021-11-20 07:24:08,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:08,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732368474] [2021-11-20 07:24:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:08,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:24:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:24:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:24:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:24:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:24:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:24:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:24:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:24:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:24:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 07:24:08,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:08,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732368474] [2021-11-20 07:24:08,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732368474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:08,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:24:08,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 07:24:08,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239405393] [2021-11-20 07:24:08,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:08,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:24:08,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:08,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:24:08,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:24:08,908 INFO L87 Difference]: Start difference. First operand 305 states and 362 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 07:24:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:09,739 INFO L93 Difference]: Finished difference Result 329 states and 393 transitions. [2021-11-20 07:24:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:24:09,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 90 [2021-11-20 07:24:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:09,741 INFO L225 Difference]: With dead ends: 329 [2021-11-20 07:24:09,741 INFO L226 Difference]: Without dead ends: 327 [2021-11-20 07:24:09,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:24:09,742 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 51 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:09,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 961 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:24:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-20 07:24:09,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 314. [2021-11-20 07:24:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 219 states have (on average 1.1141552511415524) internal successors, (244), 228 states have internal predecessors, (244), 63 states have call successors, (63), 31 states have call predecessors, (63), 31 states have return successors, (67), 54 states have call predecessors, (67), 60 states have call successors, (67) [2021-11-20 07:24:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 374 transitions. [2021-11-20 07:24:09,787 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 374 transitions. Word has length 90 [2021-11-20 07:24:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:09,788 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 374 transitions. [2021-11-20 07:24:09,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 07:24:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 374 transitions. [2021-11-20 07:24:09,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 07:24:09,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:09,790 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2021-11-20 07:24:09,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 07:24:09,791 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:09,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:09,791 INFO L85 PathProgramCache]: Analyzing trace with hash -747210356, now seen corresponding path program 1 times [2021-11-20 07:24:09,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:09,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187045251] [2021-11-20 07:24:09,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:09,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:10,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:10,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:24:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:10,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:10,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:24:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:10,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:24:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:10,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:24:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:10,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:24:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:10,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:24:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:10,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:24:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:10,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:24:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:10,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:24:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 07:24:10,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:10,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187045251] [2021-11-20 07:24:10,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187045251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:10,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:24:10,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 07:24:10,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312970989] [2021-11-20 07:24:10,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:10,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:24:10,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:24:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:24:10,410 INFO L87 Difference]: Start difference. First operand 314 states and 374 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 07:24:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:11,337 INFO L93 Difference]: Finished difference Result 378 states and 465 transitions. [2021-11-20 07:24:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:24:11,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 90 [2021-11-20 07:24:11,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:11,340 INFO L225 Difference]: With dead ends: 378 [2021-11-20 07:24:11,340 INFO L226 Difference]: Without dead ends: 356 [2021-11-20 07:24:11,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:24:11,342 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 19 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:11,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 744 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:24:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-20 07:24:11,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 339. [2021-11-20 07:24:11,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 231 states have (on average 1.1168831168831168) internal successors, (258), 241 states have internal predecessors, (258), 76 states have call successors, (76), 31 states have call predecessors, (76), 31 states have return successors, (80), 66 states have call predecessors, (80), 73 states have call successors, (80) [2021-11-20 07:24:11,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 414 transitions. [2021-11-20 07:24:11,395 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 414 transitions. Word has length 90 [2021-11-20 07:24:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:11,395 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 414 transitions. [2021-11-20 07:24:11,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 07:24:11,395 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 414 transitions. [2021-11-20 07:24:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 07:24:11,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:11,397 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2021-11-20 07:24:11,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 07:24:11,398 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:11,398 INFO L85 PathProgramCache]: Analyzing trace with hash -676844014, now seen corresponding path program 1 times [2021-11-20 07:24:11,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:11,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422608290] [2021-11-20 07:24:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:11,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:12,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:12,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:24:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:12,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:12,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:24:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:12,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:24:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:12,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:24:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:12,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:24:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:12,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:24:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:12,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:24:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:12,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:24:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:12,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:24:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 07:24:12,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422608290] [2021-11-20 07:24:12,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422608290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:12,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:24:12,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 07:24:12,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157716412] [2021-11-20 07:24:12,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:12,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:24:12,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:12,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:24:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:24:12,981 INFO L87 Difference]: Start difference. First operand 339 states and 414 transitions. Second operand has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 07:24:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:13,916 INFO L93 Difference]: Finished difference Result 362 states and 443 transitions. [2021-11-20 07:24:13,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:24:13,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 90 [2021-11-20 07:24:13,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:13,918 INFO L225 Difference]: With dead ends: 362 [2021-11-20 07:24:13,918 INFO L226 Difference]: Without dead ends: 360 [2021-11-20 07:24:13,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:24:13,919 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 33 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:13,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1000 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:24:13,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-20 07:24:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 343. [2021-11-20 07:24:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 234 states have (on average 1.1196581196581197) internal successors, (262), 243 states have internal predecessors, (262), 77 states have call successors, (77), 31 states have call predecessors, (77), 31 states have return successors, (81), 68 states have call predecessors, (81), 74 states have call successors, (81) [2021-11-20 07:24:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 420 transitions. [2021-11-20 07:24:13,976 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 420 transitions. Word has length 90 [2021-11-20 07:24:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:13,977 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 420 transitions. [2021-11-20 07:24:13,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 07:24:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 420 transitions. [2021-11-20 07:24:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 07:24:13,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:13,979 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2021-11-20 07:24:13,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 07:24:13,980 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:13,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:13,980 INFO L85 PathProgramCache]: Analyzing trace with hash -689952054, now seen corresponding path program 1 times [2021-11-20 07:24:13,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:13,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943736175] [2021-11-20 07:24:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:13,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:24:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:24:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:24:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:24:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:24:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:24:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:24:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:24:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:24:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 07:24:14,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:14,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943736175] [2021-11-20 07:24:14,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943736175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:24:14,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560082784] [2021-11-20 07:24:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:14,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:24:14,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:24:14,443 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:24:14,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:24:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 2551 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 07:24:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:24:15,310 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 48 treesize of output 32 [2021-11-20 07:24:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:24:15,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:24:15,877 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 24 treesize of output 16 [2021-11-20 07:24:15,923 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-20 07:24:15,923 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 30 treesize of output 25 [2021-11-20 07:24:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 07:24:15,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560082784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:24:15,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:24:15,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 22 [2021-11-20 07:24:15,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049584006] [2021-11-20 07:24:15,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:24:15,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 07:24:15,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:15,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 07:24:15,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:24:15,944 INFO L87 Difference]: Start difference. First operand 343 states and 420 transitions. Second operand has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 10 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:24:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:18,255 INFO L93 Difference]: Finished difference Result 510 states and 662 transitions. [2021-11-20 07:24:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:24:18,256 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 10 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 90 [2021-11-20 07:24:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:18,259 INFO L225 Difference]: With dead ends: 510 [2021-11-20 07:24:18,260 INFO L226 Difference]: Without dead ends: 495 [2021-11-20 07:24:18,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 186 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 07:24:18,262 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 224 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:18,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1858 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1486 Invalid, 0 Unknown, 260 Unchecked, 1.6s Time] [2021-11-20 07:24:18,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-20 07:24:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 358. [2021-11-20 07:24:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 245 states have (on average 1.1142857142857143) internal successors, (273), 253 states have internal predecessors, (273), 80 states have call successors, (80), 32 states have call predecessors, (80), 32 states have return successors, (84), 72 states have call predecessors, (84), 77 states have call successors, (84) [2021-11-20 07:24:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 437 transitions. [2021-11-20 07:24:18,326 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 437 transitions. Word has length 90 [2021-11-20 07:24:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:18,327 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 437 transitions. [2021-11-20 07:24:18,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 10 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:24:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 437 transitions. [2021-11-20 07:24:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 07:24:18,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:18,330 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:24:18,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:24:18,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:24:18,551 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:18,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:18,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1792661847, now seen corresponding path program 1 times [2021-11-20 07:24:18,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:18,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753377731] [2021-11-20 07:24:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:18,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:24:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:24:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:24:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:24:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:24:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:24:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:24:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:24:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:24:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 07:24:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-20 07:24:19,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:19,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753377731] [2021-11-20 07:24:19,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753377731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:19,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:24:19,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 07:24:19,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723915994] [2021-11-20 07:24:19,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:19,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:24:19,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:19,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:24:19,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:24:19,118 INFO L87 Difference]: Start difference. First operand 358 states and 437 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 07:24:19,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:19,899 INFO L93 Difference]: Finished difference Result 396 states and 488 transitions. [2021-11-20 07:24:19,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:24:19,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 96 [2021-11-20 07:24:19,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:19,902 INFO L225 Difference]: With dead ends: 396 [2021-11-20 07:24:19,902 INFO L226 Difference]: Without dead ends: 378 [2021-11-20 07:24:19,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:24:19,903 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 16 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:19,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 627 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:24:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-20 07:24:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 369. [2021-11-20 07:24:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 250 states have (on average 1.116) internal successors, (279), 258 states have internal predecessors, (279), 86 states have call successors, (86), 32 states have call predecessors, (86), 32 states have return successors, (90), 78 states have call predecessors, (90), 83 states have call successors, (90) [2021-11-20 07:24:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 455 transitions. [2021-11-20 07:24:19,977 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 455 transitions. Word has length 96 [2021-11-20 07:24:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:19,978 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 455 transitions. [2021-11-20 07:24:19,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 07:24:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 455 transitions. [2021-11-20 07:24:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 07:24:19,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:19,981 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:24:19,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-20 07:24:19,981 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:19,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:19,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1410948513, now seen corresponding path program 1 times [2021-11-20 07:24:19,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:19,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382754760] [2021-11-20 07:24:19,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:19,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:24:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:24:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:24:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:24:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:24:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:24:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:24:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:24:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:24:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 07:24:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-20 07:24:20,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:20,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382754760] [2021-11-20 07:24:20,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382754760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:20,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:24:20,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:24:20,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208123016] [2021-11-20 07:24:20,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:20,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:24:20,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:24:20,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:24:20,244 INFO L87 Difference]: Start difference. First operand 369 states and 455 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 07:24:20,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:20,579 INFO L93 Difference]: Finished difference Result 388 states and 478 transitions. [2021-11-20 07:24:20,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:24:20,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 96 [2021-11-20 07:24:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:20,582 INFO L225 Difference]: With dead ends: 388 [2021-11-20 07:24:20,583 INFO L226 Difference]: Without dead ends: 386 [2021-11-20 07:24:20,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:24:20,584 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 23 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:20,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 713 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:24:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-20 07:24:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 375. [2021-11-20 07:24:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 254 states have (on average 1.1141732283464567) internal successors, (283), 262 states have internal predecessors, (283), 87 states have call successors, (87), 33 states have call predecessors, (87), 33 states have return successors, (91), 79 states have call predecessors, (91), 84 states have call successors, (91) [2021-11-20 07:24:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 461 transitions. [2021-11-20 07:24:20,649 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 461 transitions. Word has length 96 [2021-11-20 07:24:20,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:20,650 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 461 transitions. [2021-11-20 07:24:20,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 07:24:20,651 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 461 transitions. [2021-11-20 07:24:20,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 07:24:20,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:20,653 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:24:20,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 07:24:20,654 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:20,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:20,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1751987097, now seen corresponding path program 1 times [2021-11-20 07:24:20,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:20,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234371793] [2021-11-20 07:24:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:20,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:24:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:24:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:24:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:24:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:24:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:24:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:24:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:24:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:24:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 07:24:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-20 07:24:21,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:21,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234371793] [2021-11-20 07:24:21,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234371793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:21,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:24:21,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-20 07:24:21,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093045195] [2021-11-20 07:24:21,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:21,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:24:21,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:21,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:24:21,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:24:21,377 INFO L87 Difference]: Start difference. First operand 375 states and 461 transitions. Second operand has 15 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 07:24:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:22,265 INFO L93 Difference]: Finished difference Result 395 states and 485 transitions. [2021-11-20 07:24:22,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:24:22,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 96 [2021-11-20 07:24:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:22,268 INFO L225 Difference]: With dead ends: 395 [2021-11-20 07:24:22,268 INFO L226 Difference]: Without dead ends: 393 [2021-11-20 07:24:22,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:24:22,269 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 50 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:22,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1271 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:24:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-20 07:24:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 382. [2021-11-20 07:24:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 258 states have (on average 1.1124031007751938) internal successors, (287), 267 states have internal predecessors, (287), 89 states have call successors, (89), 34 states have call predecessors, (89), 34 states have return successors, (93), 80 states have call predecessors, (93), 86 states have call successors, (93) [2021-11-20 07:24:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 469 transitions. [2021-11-20 07:24:22,338 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 469 transitions. Word has length 96 [2021-11-20 07:24:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:22,339 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 469 transitions. [2021-11-20 07:24:22,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 07:24:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 469 transitions. [2021-11-20 07:24:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 07:24:22,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:22,342 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:24:22,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-20 07:24:22,342 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:22,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1241388199, now seen corresponding path program 1 times [2021-11-20 07:24:22,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:22,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736441509] [2021-11-20 07:24:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:22,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:24:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:24:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:24:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:24:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:24:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:24:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:24:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:24:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:24:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 07:24:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-20 07:24:22,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:22,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736441509] [2021-11-20 07:24:22,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736441509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:24:22,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662829581] [2021-11-20 07:24:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:22,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:24:22,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:24:22,780 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:24:22,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:24:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:23,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 2558 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 07:24:23,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:24:23,231 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 19 treesize of output 1 [2021-11-20 07:24:23,662 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 51 treesize of output 35 [2021-11-20 07:24:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 19 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 07:24:23,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:24:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-20 07:24:24,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662829581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:24:24,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:24:24,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 23 [2021-11-20 07:24:24,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537554619] [2021-11-20 07:24:24,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:24:24,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 07:24:24,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:24,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 07:24:24,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:24:24,263 INFO L87 Difference]: Start difference. First operand 382 states and 469 transitions. Second operand has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 11 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 9 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-20 07:24:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:26,573 INFO L93 Difference]: Finished difference Result 606 states and 741 transitions. [2021-11-20 07:24:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 07:24:26,573 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 11 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 9 states have call predecessors, (22), 11 states have call successors, (22) Word has length 96 [2021-11-20 07:24:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:26,575 INFO L225 Difference]: With dead ends: 606 [2021-11-20 07:24:26,576 INFO L226 Difference]: Without dead ends: 467 [2021-11-20 07:24:26,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 198 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=330, Invalid=2120, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 07:24:26,577 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 148 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:26,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1401 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1611 Invalid, 0 Unknown, 165 Unchecked, 1.5s Time] [2021-11-20 07:24:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-11-20 07:24:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 381. [2021-11-20 07:24:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 258 states have (on average 1.0930232558139534) internal successors, (282), 264 states have internal predecessors, (282), 88 states have call successors, (88), 34 states have call predecessors, (88), 34 states have return successors, (92), 82 states have call predecessors, (92), 85 states have call successors, (92) [2021-11-20 07:24:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 462 transitions. [2021-11-20 07:24:26,658 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 462 transitions. Word has length 96 [2021-11-20 07:24:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:26,659 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 462 transitions. [2021-11-20 07:24:26,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 11 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 9 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-20 07:24:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 462 transitions. [2021-11-20 07:24:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 07:24:26,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:26,662 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:24:26,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:24:26,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:24:26,888 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:26,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1566240838, now seen corresponding path program 1 times [2021-11-20 07:24:26,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:26,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59238782] [2021-11-20 07:24:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:26,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:24:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:24:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 07:24:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 07:24:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:24:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 07:24:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:24:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 07:24:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 07:24:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 07:24:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 07:24:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 07:24:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-20 07:24:27,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:27,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59238782] [2021-11-20 07:24:27,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59238782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:24:27,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829018261] [2021-11-20 07:24:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:27,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:24:27,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:24:27,760 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:24:27,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:24:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:28,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 2581 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-20 07:24:28,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:24:28,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:24:28,399 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:24:28,399 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 [2021-11-20 07:24:28,885 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:24:28,885 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 11 treesize of output 11 [2021-11-20 07:24:29,688 INFO L354 Elim1Store]: treesize reduction 48, result has 41.5 percent of original size [2021-11-20 07:24:29,688 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 4 case distinctions, treesize of input 81 treesize of output 72 [2021-11-20 07:24:29,735 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-20 07:24:29,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 68 treesize of output 77 [2021-11-20 07:27:15,284 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-20 07:27:15,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 93 treesize of output 85 [2021-11-20 07:27:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 53 refuted. 7 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 07:27:15,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:19,756 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| Int) (v_DerPreprocessor_11 Int) (v_DerPreprocessor_12 Int)) (<= (mod (select (select (let ((.cse0 (store |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| (store (store (select |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base|) (+ |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset| 8) v_DerPreprocessor_11) |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset| |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1|)))) (store .cse0 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base| (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) (+ 8 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|) v_DerPreprocessor_12))) (store .cse1 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset| (+ (* |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1| (- 1)) (select .cse1 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|)))))) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.offset|) 18446744073709551616) 9223372036854775807)) (<= (mod |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~len~2#1| 18446744073709551616) 9223372036854775807)) is different from false [2021-11-20 07:27:31,289 WARN L227 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:27:31,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829018261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:31,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:31,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 34 [2021-11-20 07:27:31,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018546836] [2021-11-20 07:27:31,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:31,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 07:27:31,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:31,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 07:27:31,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1197, Unknown=19, NotChecked=70, Total=1406 [2021-11-20 07:27:31,329 INFO L87 Difference]: Start difference. First operand 381 states and 462 transitions. Second operand has 34 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 31 states have internal predecessors, (97), 11 states have call successors, (26), 9 states have call predecessors, (26), 10 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2021-11-20 07:28:51,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:51,972 INFO L93 Difference]: Finished difference Result 461 states and 548 transitions. [2021-11-20 07:28:51,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 07:28:51,973 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 31 states have internal predecessors, (97), 11 states have call successors, (26), 9 states have call predecessors, (26), 10 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) Word has length 101 [2021-11-20 07:28:51,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:51,975 INFO L225 Difference]: With dead ends: 461 [2021-11-20 07:28:51,975 INFO L226 Difference]: Without dead ends: 433 [2021-11-20 07:28:51,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 151 SyntacticMatches, 18 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 209.9s TimeCoverageRelationStatistics Valid=334, Invalid=3400, Unknown=52, NotChecked=120, Total=3906 [2021-11-20 07:28:51,977 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 85 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1021 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:51,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1074 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1282 Invalid, 0 Unknown, 1021 Unchecked, 1.2s Time] [2021-11-20 07:28:51,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-20 07:28:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 419. [2021-11-20 07:28:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 286 states have (on average 1.083916083916084) internal successors, (310), 292 states have internal predecessors, (310), 92 states have call successors, (92), 41 states have call predecessors, (92), 40 states have return successors, (96), 85 states have call predecessors, (96), 89 states have call successors, (96) [2021-11-20 07:28:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 498 transitions. [2021-11-20 07:28:52,053 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 498 transitions. Word has length 101 [2021-11-20 07:28:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:52,054 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 498 transitions. [2021-11-20 07:28:52,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 31 states have internal predecessors, (97), 11 states have call successors, (26), 9 states have call predecessors, (26), 10 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2021-11-20 07:28:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 498 transitions. [2021-11-20 07:28:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 07:28:52,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:52,057 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:52,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:52,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-20 07:28:52,276 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:28:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:52,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1636607180, now seen corresponding path program 1 times [2021-11-20 07:28:52,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:52,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403565341] [2021-11-20 07:28:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:52,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:28:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:28:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:28:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 07:28:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 07:28:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:28:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 07:28:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:28:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 07:28:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 07:28:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 07:28:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 07:28:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 07:28:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-20 07:28:53,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:53,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403565341] [2021-11-20 07:28:53,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403565341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:53,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:53,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-20 07:28:53,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003184068] [2021-11-20 07:28:53,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:53,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:28:53,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:53,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:28:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:28:53,261 INFO L87 Difference]: Start difference. First operand 419 states and 498 transitions. Second operand has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:28:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:54,667 INFO L93 Difference]: Finished difference Result 436 states and 517 transitions. [2021-11-20 07:28:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:28:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) Word has length 101 [2021-11-20 07:28:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:54,671 INFO L225 Difference]: With dead ends: 436 [2021-11-20 07:28:54,671 INFO L226 Difference]: Without dead ends: 434 [2021-11-20 07:28:54,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-11-20 07:28:54,673 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 97 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:54,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 490 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 07:28:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-11-20 07:28:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 427. [2021-11-20 07:28:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 292 states have (on average 1.082191780821918) internal successors, (316), 298 states have internal predecessors, (316), 93 states have call successors, (93), 42 states have call predecessors, (93), 41 states have return successors, (97), 86 states have call predecessors, (97), 90 states have call successors, (97) [2021-11-20 07:28:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 506 transitions. [2021-11-20 07:28:54,751 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 506 transitions. Word has length 101 [2021-11-20 07:28:54,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:54,751 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 506 transitions. [2021-11-20 07:28:54,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:28:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 506 transitions. [2021-11-20 07:28:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:28:54,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:54,754 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-20 07:28:54,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-20 07:28:54,755 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:28:54,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:54,755 INFO L85 PathProgramCache]: Analyzing trace with hash -326672390, now seen corresponding path program 1 times [2021-11-20 07:28:54,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:54,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700688551] [2021-11-20 07:28:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:54,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:28:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:28:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:28:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:28:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:28:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:28:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:28:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:28:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:28:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:28:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:28:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 07:28:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-20 07:28:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-20 07:28:57,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:57,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700688551] [2021-11-20 07:28:57,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700688551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:57,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797881825] [2021-11-20 07:28:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:57,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:57,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:57,528 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:57,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:28:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:57,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-20 07:28:57,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:59,147 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-20 07:28:59,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:28:59,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:59,265 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-20 07:28:59,265 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 1 case distinctions, treesize of input 53 treesize of output 45 [2021-11-20 07:28:59,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:28:59,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:59,284 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:28:59,285 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 2 case distinctions, treesize of input 42 treesize of output 22 [2021-11-20 07:28:59,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:59,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:28:59,301 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-20 07:28:59,301 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 1 case distinctions, treesize of input 57 treesize of output 49 [2021-11-20 07:28:59,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:59,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:28:59,317 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-20 07:28:59,317 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 2 case distinctions, treesize of input 46 treesize of output 26 [2021-11-20 07:29:00,942 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-11-20 07:29:00,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 75 [2021-11-20 07:29:00,952 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-11-20 07:29:00,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 23 [2021-11-20 07:29:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 19 proven. 52 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-20 07:29:01,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:02,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797881825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:02,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:02,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 48 [2021-11-20 07:29:02,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015439842] [2021-11-20 07:29:02,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:02,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 07:29:02,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:02,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 07:29:02,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2889, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 07:29:02,951 INFO L87 Difference]: Start difference. First operand 427 states and 506 transitions. Second operand has 48 states, 40 states have (on average 2.1) internal successors, (84), 45 states have internal predecessors, (84), 19 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (26), 13 states have call predecessors, (26), 17 states have call successors, (26) [2021-11-20 07:29:08,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:08,122 INFO L93 Difference]: Finished difference Result 466 states and 555 transitions. [2021-11-20 07:29:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-20 07:29:08,122 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 40 states have (on average 2.1) internal successors, (84), 45 states have internal predecessors, (84), 19 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (26), 13 states have call predecessors, (26), 17 states have call successors, (26) Word has length 102 [2021-11-20 07:29:08,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:08,124 INFO L225 Difference]: With dead ends: 466 [2021-11-20 07:29:08,124 INFO L226 Difference]: Without dead ends: 464 [2021-11-20 07:29:08,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 107 SyntacticMatches, 17 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=516, Invalid=6966, Unknown=0, NotChecked=0, Total=7482 [2021-11-20 07:29:08,126 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 131 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 3269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 930 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:08,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1634 Invalid, 3269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2212 Invalid, 0 Unknown, 930 Unchecked, 2.4s Time] [2021-11-20 07:29:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-20 07:29:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 435. [2021-11-20 07:29:08,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 297 states have (on average 1.0808080808080809) internal successors, (321), 303 states have internal predecessors, (321), 95 states have call successors, (95), 43 states have call predecessors, (95), 42 states have return successors, (99), 88 states have call predecessors, (99), 92 states have call successors, (99) [2021-11-20 07:29:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 515 transitions. [2021-11-20 07:29:08,205 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 515 transitions. Word has length 102 [2021-11-20 07:29:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:08,205 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 515 transitions. [2021-11-20 07:29:08,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 40 states have (on average 2.1) internal successors, (84), 45 states have internal predecessors, (84), 19 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (26), 13 states have call predecessors, (26), 17 states have call successors, (26) [2021-11-20 07:29:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 515 transitions. [2021-11-20 07:29:08,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 07:29:08,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:08,208 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:08,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:08,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-20 07:29:08,424 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:08,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1201612672, now seen corresponding path program 1 times [2021-11-20 07:29:08,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:08,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458449059] [2021-11-20 07:29:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:08,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:08,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:29:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:08,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:29:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:08,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:29:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:08,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 07:29:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:08,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 07:29:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:09,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 07:29:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:09,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:29:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:09,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:29:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:09,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:29:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:09,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-20 07:29:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:09,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 07:29:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-20 07:29:09,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:09,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458449059] [2021-11-20 07:29:09,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458449059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:09,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:09,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-20 07:29:09,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012916680] [2021-11-20 07:29:09,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:09,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:29:09,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:09,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:29:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:29:09,160 INFO L87 Difference]: Start difference. First operand 435 states and 515 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-20 07:29:10,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:10,733 INFO L93 Difference]: Finished difference Result 514 states and 613 transitions. [2021-11-20 07:29:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:29:10,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 101 [2021-11-20 07:29:10,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:10,736 INFO L225 Difference]: With dead ends: 514 [2021-11-20 07:29:10,736 INFO L226 Difference]: Without dead ends: 461 [2021-11-20 07:29:10,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:29:10,738 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 91 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:10,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 557 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 07:29:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-20 07:29:10,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 440. [2021-11-20 07:29:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 301 states have (on average 1.079734219269103) internal successors, (325), 308 states have internal predecessors, (325), 95 states have call successors, (95), 43 states have call predecessors, (95), 43 states have return successors, (100), 88 states have call predecessors, (100), 92 states have call successors, (100) [2021-11-20 07:29:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 520 transitions. [2021-11-20 07:29:10,821 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 520 transitions. Word has length 101 [2021-11-20 07:29:10,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:10,822 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 520 transitions. [2021-11-20 07:29:10,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-20 07:29:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 520 transitions. [2021-11-20 07:29:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 07:29:10,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:10,825 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-20 07:29:10,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-20 07:29:10,825 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:10,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:10,826 INFO L85 PathProgramCache]: Analyzing trace with hash -808905162, now seen corresponding path program 1 times [2021-11-20 07:29:10,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:10,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093568489] [2021-11-20 07:29:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:10,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:29:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:29:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:29:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:29:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:29:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:29:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:29:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:29:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:29:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:29:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:29:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 07:29:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-20 07:29:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-20 07:29:11,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:11,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093568489] [2021-11-20 07:29:11,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093568489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:11,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:11,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 07:29:11,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657356155] [2021-11-20 07:29:11,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:11,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:29:11,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:11,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:29:11,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:29:11,384 INFO L87 Difference]: Start difference. First operand 440 states and 520 transitions. Second operand has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 07:29:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:11,813 INFO L93 Difference]: Finished difference Result 462 states and 545 transitions. [2021-11-20 07:29:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:29:11,814 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 106 [2021-11-20 07:29:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:11,816 INFO L225 Difference]: With dead ends: 462 [2021-11-20 07:29:11,817 INFO L226 Difference]: Without dead ends: 416 [2021-11-20 07:29:11,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:29:11,818 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 24 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:11,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 842 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:29:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-20 07:29:11,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2021-11-20 07:29:11,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 288 states have (on average 1.0763888888888888) internal successors, (310), 294 states have internal predecessors, (310), 85 states have call successors, (85), 41 states have call predecessors, (85), 42 states have return successors, (90), 80 states have call predecessors, (90), 82 states have call successors, (90) [2021-11-20 07:29:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 485 transitions. [2021-11-20 07:29:11,893 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 485 transitions. Word has length 106 [2021-11-20 07:29:11,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:11,893 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 485 transitions. [2021-11-20 07:29:11,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 07:29:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 485 transitions. [2021-11-20 07:29:11,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 07:29:11,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:11,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:11,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-20 07:29:11,896 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:11,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1821091513, now seen corresponding path program 1 times [2021-11-20 07:29:11,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:11,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559931398] [2021-11-20 07:29:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:11,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:12,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:29:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:12,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:29:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:12,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:29:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:12,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 07:29:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:12,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 07:29:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:12,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 07:29:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:12,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:29:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:12,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:29:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:12,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:29:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:12,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-20 07:29:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:12,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 07:29:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 07:29:12,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:12,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559931398] [2021-11-20 07:29:12,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559931398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:12,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:12,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 07:29:12,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068689353] [2021-11-20 07:29:12,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:12,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:29:12,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:12,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:29:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:29:12,322 INFO L87 Difference]: Start difference. First operand 416 states and 485 transitions. Second operand has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 07:29:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:13,023 INFO L93 Difference]: Finished difference Result 422 states and 490 transitions. [2021-11-20 07:29:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:29:13,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 103 [2021-11-20 07:29:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:13,026 INFO L225 Difference]: With dead ends: 422 [2021-11-20 07:29:13,027 INFO L226 Difference]: Without dead ends: 420 [2021-11-20 07:29:13,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:29:13,027 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 60 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:13,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 854 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:29:13,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-20 07:29:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2021-11-20 07:29:13,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 291 states have (on average 1.0756013745704467) internal successors, (313), 297 states have internal predecessors, (313), 85 states have call successors, (85), 42 states have call predecessors, (85), 43 states have return successors, (90), 80 states have call predecessors, (90), 82 states have call successors, (90) [2021-11-20 07:29:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 488 transitions. [2021-11-20 07:29:13,124 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 488 transitions. Word has length 103 [2021-11-20 07:29:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:13,124 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 488 transitions. [2021-11-20 07:29:13,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 07:29:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 488 transitions. [2021-11-20 07:29:13,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-20 07:29:13,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:13,127 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:13,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-20 07:29:13,127 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:13,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:13,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1257386079, now seen corresponding path program 1 times [2021-11-20 07:29:13,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:13,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571765788] [2021-11-20 07:29:13,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:13,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:13,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:29:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:13,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:29:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:13,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:29:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:13,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 07:29:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:13,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 07:29:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:13,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:29:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:13,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 07:29:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:13,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:29:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:13,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 07:29:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:13,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 07:29:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:13,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 07:29:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:13,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 07:29:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:14,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 07:29:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:14,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-20 07:29:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-20 07:29:14,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:14,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571765788] [2021-11-20 07:29:14,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571765788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:14,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57514933] [2021-11-20 07:29:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:14,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:14,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:14,017 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:14,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:29:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:14,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-20 07:29:14,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:15,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:29:15,214 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 29 [2021-11-20 07:29:15,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:29:15,285 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 55 treesize of output 27 [2021-11-20 07:29:15,305 INFO L354 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2021-11-20 07:29:15,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-11-20 07:31:04,700 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-11-20 07:31:04,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 51 treesize of output 47 [2021-11-20 07:31:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 07:31:04,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:05,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57514933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:05,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:31:05,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 42 [2021-11-20 07:31:05,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416040543] [2021-11-20 07:31:05,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:05,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 07:31:05,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:05,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 07:31:05,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1991, Unknown=7, NotChecked=0, Total=2162 [2021-11-20 07:31:05,434 INFO L87 Difference]: Start difference. First operand 420 states and 488 transitions. Second operand has 42 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 37 states have internal predecessors, (98), 14 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2021-11-20 07:31:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:54,294 INFO L93 Difference]: Finished difference Result 508 states and 596 transitions. [2021-11-20 07:31:54,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-20 07:31:54,294 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 37 states have internal predecessors, (98), 14 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) Word has length 107 [2021-11-20 07:31:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:54,297 INFO L225 Difference]: With dead ends: 508 [2021-11-20 07:31:54,297 INFO L226 Difference]: Without dead ends: 491 [2021-11-20 07:31:54,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 124 SyntacticMatches, 21 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 150.6s TimeCoverageRelationStatistics Valid=544, Invalid=6406, Unknown=22, NotChecked=0, Total=6972 [2021-11-20 07:31:54,299 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 252 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:54,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 1298 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1967 Invalid, 0 Unknown, 441 Unchecked, 2.0s Time] [2021-11-20 07:31:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-20 07:31:54,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 432. [2021-11-20 07:31:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 299 states have (on average 1.0702341137123745) internal successors, (320), 307 states have internal predecessors, (320), 87 states have call successors, (87), 43 states have call predecessors, (87), 45 states have return successors, (92), 81 states have call predecessors, (92), 84 states have call successors, (92) [2021-11-20 07:31:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 499 transitions. [2021-11-20 07:31:54,404 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 499 transitions. Word has length 107 [2021-11-20 07:31:54,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:54,405 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 499 transitions. [2021-11-20 07:31:54,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 37 states have internal predecessors, (98), 14 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2021-11-20 07:31:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 499 transitions. [2021-11-20 07:31:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-20 07:31:54,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:54,408 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:54,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:54,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:54,616 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:31:54,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:54,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1379697227, now seen corresponding path program 1 times [2021-11-20 07:31:54,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:54,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067809914] [2021-11-20 07:31:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:54,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:31:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 07:31:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:31:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:31:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:31:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:31:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:31:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:31:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:31:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:31:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:31:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 07:31:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-20 07:31:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:31:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-20 07:31:56,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:56,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067809914] [2021-11-20 07:31:56,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067809914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:56,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449635193] [2021-11-20 07:31:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:56,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:56,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:56,732 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:56,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9573c4-0a7f-42e5-96f5-5d12b7dfc340/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 07:31:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:57,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 2596 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 07:31:57,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:57,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:31:58,058 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 07:31:58,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-11-20 07:31:58,249 INFO L354 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2021-11-20 07:31:58,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 53 [2021-11-20 07:32:00,643 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-20 07:32:00,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 52 [2021-11-20 07:32:00,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:32:00,818 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 07:32:00,818 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 4 case distinctions, treesize of input 84 treesize of output 61 [2021-11-20 07:32:00,834 INFO L354 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2021-11-20 07:32:00,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 40