./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:12:36,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:12:36,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:12:36,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:12:36,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:12:36,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:12:36,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:12:36,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:12:36,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:12:36,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:12:36,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:12:36,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:12:36,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:12:36,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:12:36,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:12:36,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:12:36,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:12:36,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:12:36,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:12:36,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:12:36,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:12:36,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:12:36,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:12:36,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:12:36,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:12:36,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:12:36,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:12:36,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:12:36,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:12:36,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:12:36,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:12:36,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:12:36,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:12:36,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:12:36,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:12:36,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:12:36,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:12:36,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:12:36,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:12:36,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:12:36,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:12:36,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 18:12:36,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:12:36,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:12:36,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:12:36,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:12:36,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:12:36,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:12:36,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:12:36,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:12:36,608 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:12:36,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:12:36,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:12:36,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:12:36,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:12:36,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:12:36,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:12:36,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:12:36,610 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:12:36,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:12:36,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:12:36,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:12:36,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:12:36,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:12:36,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:12:36,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:12:36,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:12:36,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:12:36,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:12:36,612 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:12:36,612 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:12:36,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:12:36,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:12:36,613 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_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2021-12-06 18:12:36,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:12:36,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:12:36,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:12:36,819 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:12:36,820 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:12:36,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-12-06 18:12:36,869 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/data/8abc93327/394d7a5608b541b596c94dbd12280a82/FLAGfa2c8d089 [2021-12-06 18:12:37,402 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:12:37,402 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-12-06 18:12:37,425 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/data/8abc93327/394d7a5608b541b596c94dbd12280a82/FLAGfa2c8d089 [2021-12-06 18:12:37,900 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/data/8abc93327/394d7a5608b541b596c94dbd12280a82 [2021-12-06 18:12:37,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:12:37,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:12:37,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:12:37,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:12:37,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:12:37,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:12:37" (1/1) ... [2021-12-06 18:12:37,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb204f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:37, skipping insertion in model container [2021-12-06 18:12:37,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:12:37" (1/1) ... [2021-12-06 18:12:37,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:12:37,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:12:38,167 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_09b4b631-b5c1-48a4-b453-a268e46f222d/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-12-06 18:12:38,173 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_09b4b631-b5c1-48a4-b453-a268e46f222d/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-12-06 18:12:38,697 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,697 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,698 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,699 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,700 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,714 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,717 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,717 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,719 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,720 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,721 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,721 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:38,987 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 18:12:38,988 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 18:12:38,989 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 18:12:38,990 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 18:12:38,991 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 18:12:38,992 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 18:12:38,993 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 18:12:38,993 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 18:12:38,994 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 18:12:38,994 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 18:12:39,102 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 18:12:39,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:12:39,138 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:12:39,151 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_09b4b631-b5c1-48a4-b453-a268e46f222d/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-12-06 18:12:39,151 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_09b4b631-b5c1-48a4-b453-a268e46f222d/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-12-06 18:12:39,194 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,194 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,195 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,195 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,196 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,201 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,201 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,202 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,202 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,203 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,204 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,204 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,204 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:12:39,229 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 18:12:39,230 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 18:12:39,230 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 18:12:39,231 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 18:12:39,231 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 18:12:39,232 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 18:12:39,232 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 18:12:39,232 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 18:12:39,233 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 18:12:39,233 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 18:12:39,248 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 18:12:39,258 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:12:39,441 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:12:39,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:39 WrapperNode [2021-12-06 18:12:39,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:12:39,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:12:39,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:12:39,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:12:39,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:39" (1/1) ... [2021-12-06 18:12:39,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:39" (1/1) ... [2021-12-06 18:12:39,538 INFO L137 Inliner]: procedures = 679, calls = 1046, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 225 [2021-12-06 18:12:39,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:12:39,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:12:39,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:12:39,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:12:39,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:39" (1/1) ... [2021-12-06 18:12:39,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:39" (1/1) ... [2021-12-06 18:12:39,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:39" (1/1) ... [2021-12-06 18:12:39,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:39" (1/1) ... [2021-12-06 18:12:39,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:39" (1/1) ... [2021-12-06 18:12:39,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:39" (1/1) ... [2021-12-06 18:12:39,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:39" (1/1) ... [2021-12-06 18:12:39,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:12:39,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:12:39,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:12:39,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:12:39,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:39" (1/1) ... [2021-12-06 18:12:39,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:12:39,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:39,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:12:39,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:12:39,638 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-06 18:12:39,639 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-06 18:12:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-12-06 18:12:39,639 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-12-06 18:12:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:12:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:12:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 18:12:39,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 18:12:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-06 18:12:39,640 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-06 18:12:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:12:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-06 18:12:39,640 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-06 18:12:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:12:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 18:12:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:12:39,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:12:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-12-06 18:12:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-12-06 18:12:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-06 18:12:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-06 18:12:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 18:12:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 18:12:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:12:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 18:12:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 18:12:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-06 18:12:39,642 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-06 18:12:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-12-06 18:12:39,642 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-12-06 18:12:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:12:39,810 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:12:39,812 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:12:40,087 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:12:40,095 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:12:40,095 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-06 18:12:40,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:12:40 BoogieIcfgContainer [2021-12-06 18:12:40,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:12:40,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:12:40,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:12:40,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:12:40,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:12:37" (1/3) ... [2021-12-06 18:12:40,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3a8f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:12:40, skipping insertion in model container [2021-12-06 18:12:40,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:39" (2/3) ... [2021-12-06 18:12:40,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3a8f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:12:40, skipping insertion in model container [2021-12-06 18:12:40,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:12:40" (3/3) ... [2021-12-06 18:12:40,105 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_front_harness.i [2021-12-06 18:12:40,108 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:12:40,109 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:12:40,152 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:12:40,158 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:12:40,158 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:12:40,173 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-06 18:12:40,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 18:12:40,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:40,182 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 18:12:40,183 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:40,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1579343520, now seen corresponding path program 1 times [2021-12-06 18:12:40,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:40,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936607703] [2021-12-06 18:12:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:40,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:12:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:12:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:12:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:12:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:12:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:12:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:12:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:12:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:12:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:12:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:12:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:12:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:12:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-06 18:12:40,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:40,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936607703] [2021-12-06 18:12:40,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936607703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:12:40,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129041374] [2021-12-06 18:12:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:40,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:40,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:40,714 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:40,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:12:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:40,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:12:40,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 18:12:41,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:12:41,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129041374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:41,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:12:41,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-06 18:12:41,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202292931] [2021-12-06 18:12:41,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:41,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:12:41,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:41,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:12:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:12:41,045 INFO L87 Difference]: Start difference. First operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:12:41,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:41,102 INFO L93 Difference]: Finished difference Result 274 states and 414 transitions. [2021-12-06 18:12:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:12:41,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2021-12-06 18:12:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:41,115 INFO L225 Difference]: With dead ends: 274 [2021-12-06 18:12:41,115 INFO L226 Difference]: Without dead ends: 140 [2021-12-06 18:12:41,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:12:41,125 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 12 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:41,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 536 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:12:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-06 18:12:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-12-06 18:12:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 86 states have (on average 1.244186046511628) internal successors, (107), 87 states have internal predecessors, (107), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-06 18:12:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 180 transitions. [2021-12-06 18:12:41,171 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 180 transitions. Word has length 116 [2021-12-06 18:12:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:41,172 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 180 transitions. [2021-12-06 18:12:41,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:12:41,173 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 180 transitions. [2021-12-06 18:12:41,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 18:12:41,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:41,179 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 18:12:41,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:12:41,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:41,381 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:41,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:41,383 INFO L85 PathProgramCache]: Analyzing trace with hash -183799078, now seen corresponding path program 1 times [2021-12-06 18:12:41,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:41,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339244102] [2021-12-06 18:12:41,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:41,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:12:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:12:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:12:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:12:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:12:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:12:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:12:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:12:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:12:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:12:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:12:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:12:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:12:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-12-06 18:12:41,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:41,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339244102] [2021-12-06 18:12:41,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339244102] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:12:41,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632209239] [2021-12-06 18:12:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:41,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:41,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:41,726 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:41,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:12:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:41,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:12:41,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 18:12:41,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:12:41,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632209239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:41,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:12:41,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-06 18:12:41,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248916369] [2021-12-06 18:12:41,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:41,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:12:41,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:41,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:12:41,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:12:41,954 INFO L87 Difference]: Start difference. First operand 134 states and 180 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:12:41,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:41,982 INFO L93 Difference]: Finished difference Result 252 states and 345 transitions. [2021-12-06 18:12:41,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:12:41,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2021-12-06 18:12:41,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:41,985 INFO L225 Difference]: With dead ends: 252 [2021-12-06 18:12:41,985 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 18:12:41,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:12:41,988 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 3 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:41,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 520 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:12:41,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 18:12:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-12-06 18:12:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 90 states have internal predecessors, (110), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-06 18:12:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2021-12-06 18:12:42,002 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 116 [2021-12-06 18:12:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:42,002 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2021-12-06 18:12:42,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:12:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2021-12-06 18:12:42,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 18:12:42,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:42,004 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 18:12:42,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:12:42,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-06 18:12:42,206 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:42,208 INFO L85 PathProgramCache]: Analyzing trace with hash -543175276, now seen corresponding path program 1 times [2021-12-06 18:12:42,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:42,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363675286] [2021-12-06 18:12:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:42,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:12:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:12:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:12:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:12:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:12:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:12:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:12:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:12:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:12:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:12:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:12:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:12:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:12:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-06 18:12:42,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:42,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363675286] [2021-12-06 18:12:42,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363675286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:12:42,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861621099] [2021-12-06 18:12:42,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:42,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:42,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:42,687 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:42,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:12:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 18:12:42,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:42,898 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 14 treesize of output 15 [2021-12-06 18:12:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-06 18:12:43,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:12:43,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861621099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:43,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:12:43,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 18 [2021-12-06 18:12:43,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852191339] [2021-12-06 18:12:43,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:43,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:12:43,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:43,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:12:43,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:12:43,512 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 12 states have internal predecessors, (62), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 18:12:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:43,632 INFO L93 Difference]: Finished difference Result 327 states and 442 transitions. [2021-12-06 18:12:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:12:43,633 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 12 states have internal predecessors, (62), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 116 [2021-12-06 18:12:43,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:43,636 INFO L225 Difference]: With dead ends: 327 [2021-12-06 18:12:43,637 INFO L226 Difference]: Without dead ends: 213 [2021-12-06 18:12:43,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:12:43,639 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 58 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:43,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 777 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2021-12-06 18:12:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-06 18:12:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 179. [2021-12-06 18:12:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 122 states have internal predecessors, (144), 45 states have call successors, (45), 13 states have call predecessors, (45), 14 states have return successors, (47), 43 states have call predecessors, (47), 44 states have call successors, (47) [2021-12-06 18:12:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 236 transitions. [2021-12-06 18:12:43,657 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 236 transitions. Word has length 116 [2021-12-06 18:12:43,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:43,657 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 236 transitions. [2021-12-06 18:12:43,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 12 states have internal predecessors, (62), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 18:12:43,662 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 236 transitions. [2021-12-06 18:12:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 18:12:43,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:43,665 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:43,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:12:43,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:43,867 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:43,869 INFO L85 PathProgramCache]: Analyzing trace with hash -670206630, now seen corresponding path program 1 times [2021-12-06 18:12:43,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:43,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653107364] [2021-12-06 18:12:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:43,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:12:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:12:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:12:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:12:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:12:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:12:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:12:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:12:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:12:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:12:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:12:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:12:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:12:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-06 18:12:44,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:44,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653107364] [2021-12-06 18:12:44,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653107364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:12:44,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796359281] [2021-12-06 18:12:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:44,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:44,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:44,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:44,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:12:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:44,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 18:12:44,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:44,498 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:12:44,498 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 9 treesize of output 15 [2021-12-06 18:12:44,507 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:12:44,508 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 9 treesize of output 15 [2021-12-06 18:12:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 107 proven. 7 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-06 18:12:45,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:12:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-06 18:12:45,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796359281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:12:45,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:12:45,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 11] total 29 [2021-12-06 18:12:45,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94607818] [2021-12-06 18:12:45,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:12:45,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 18:12:45,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:45,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 18:12:45,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:12:45,706 INFO L87 Difference]: Start difference. First operand 179 states and 236 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 11 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (35), 9 states have call predecessors, (35), 11 states have call successors, (35) [2021-12-06 18:12:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:47,077 INFO L93 Difference]: Finished difference Result 436 states and 617 transitions. [2021-12-06 18:12:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 18:12:47,078 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 11 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (35), 9 states have call predecessors, (35), 11 states have call successors, (35) Word has length 116 [2021-12-06 18:12:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:47,081 INFO L225 Difference]: With dead ends: 436 [2021-12-06 18:12:47,081 INFO L226 Difference]: Without dead ends: 314 [2021-12-06 18:12:47,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 244 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=399, Invalid=2463, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:12:47,084 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 302 mSDsluCounter, 2849 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 3117 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:47,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 3117 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1346 Invalid, 0 Unknown, 370 Unchecked, 0.7s Time] [2021-12-06 18:12:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-06 18:12:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 226. [2021-12-06 18:12:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 149 states have (on average 1.1812080536912752) internal successors, (176), 152 states have internal predecessors, (176), 58 states have call successors, (58), 17 states have call predecessors, (58), 18 states have return successors, (73), 56 states have call predecessors, (73), 57 states have call successors, (73) [2021-12-06 18:12:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 307 transitions. [2021-12-06 18:12:47,107 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 307 transitions. Word has length 116 [2021-12-06 18:12:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:47,108 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 307 transitions. [2021-12-06 18:12:47,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 11 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (35), 9 states have call predecessors, (35), 11 states have call successors, (35) [2021-12-06 18:12:47,108 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 307 transitions. [2021-12-06 18:12:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 18:12:47,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:47,110 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 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, 1] [2021-12-06 18:12:47,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:12:47,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:47,312 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:47,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1395986770, now seen corresponding path program 1 times [2021-12-06 18:12:47,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:47,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309939750] [2021-12-06 18:12:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:47,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:12:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:12:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:12:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:12:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:12:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:12:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:12:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:12:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:12:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:12:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:12:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:12:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:12:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-06 18:12:47,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:47,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309939750] [2021-12-06 18:12:47,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309939750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:12:47,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057420181] [2021-12-06 18:12:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:47,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:47,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:47,621 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:47,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:12:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:47,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:12:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-06 18:12:47,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:12:47,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057420181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:47,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:12:47,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-12-06 18:12:47,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017785663] [2021-12-06 18:12:47,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:47,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:12:47,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:47,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:12:47,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:12:47,878 INFO L87 Difference]: Start difference. First operand 226 states and 307 transitions. Second operand has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-06 18:12:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:48,027 INFO L93 Difference]: Finished difference Result 417 states and 561 transitions. [2021-12-06 18:12:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:12:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 116 [2021-12-06 18:12:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:48,029 INFO L225 Difference]: With dead ends: 417 [2021-12-06 18:12:48,030 INFO L226 Difference]: Without dead ends: 187 [2021-12-06 18:12:48,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:12:48,031 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 244 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:48,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 751 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:12:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-06 18:12:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2021-12-06 18:12:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 119 states have internal predecessors, (138), 50 states have call successors, (50), 15 states have call predecessors, (50), 15 states have return successors, (53), 48 states have call predecessors, (53), 49 states have call successors, (53) [2021-12-06 18:12:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 241 transitions. [2021-12-06 18:12:48,045 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 241 transitions. Word has length 116 [2021-12-06 18:12:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:48,046 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 241 transitions. [2021-12-06 18:12:48,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-06 18:12:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 241 transitions. [2021-12-06 18:12:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 18:12:48,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:48,048 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:48,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:12:48,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:48,249 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:48,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1369878566, now seen corresponding path program 2 times [2021-12-06 18:12:48,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:48,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357684250] [2021-12-06 18:12:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:48,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:12:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:12:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:12:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:12:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:12:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:12:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:12:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:12:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:12:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:12:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:12:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:12:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:12:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-06 18:12:48,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:48,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357684250] [2021-12-06 18:12:48,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357684250] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:12:48,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573939675] [2021-12-06 18:12:48,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:12:48,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:48,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:48,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:48,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:12:48,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:12:48,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:12:48,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 18:12:48,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:48,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:48,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 18:12:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-06 18:12:50,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:12:50,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573939675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:50,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:12:50,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2021-12-06 18:12:50,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011068502] [2021-12-06 18:12:50,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:50,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:12:50,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:50,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:12:50,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:12:50,044 INFO L87 Difference]: Start difference. First operand 183 states and 241 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-06 18:12:50,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:50,218 INFO L93 Difference]: Finished difference Result 403 states and 542 transitions. [2021-12-06 18:12:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:12:50,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 116 [2021-12-06 18:12:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:50,221 INFO L225 Difference]: With dead ends: 403 [2021-12-06 18:12:50,221 INFO L226 Difference]: Without dead ends: 277 [2021-12-06 18:12:50,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 119 SyntacticMatches, 20 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:12:50,222 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 64 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:50,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1526 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 201 Unchecked, 0.1s Time] [2021-12-06 18:12:50,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-06 18:12:50,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 233. [2021-12-06 18:12:50,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 154 states have (on average 1.1948051948051948) internal successors, (184), 156 states have internal predecessors, (184), 58 states have call successors, (58), 20 states have call predecessors, (58), 20 states have return successors, (65), 56 states have call predecessors, (65), 57 states have call successors, (65) [2021-12-06 18:12:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 307 transitions. [2021-12-06 18:12:50,238 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 307 transitions. Word has length 116 [2021-12-06 18:12:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:50,239 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 307 transitions. [2021-12-06 18:12:50,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-06 18:12:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 307 transitions. [2021-12-06 18:12:50,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 18:12:50,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:50,241 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 18:12:50,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:12:50,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 18:12:50,443 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:50,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1492302642, now seen corresponding path program 1 times [2021-12-06 18:12:50,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:50,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002249541] [2021-12-06 18:12:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:50,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:12:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:12:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:12:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:12:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:12:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:12:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:12:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:12:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:12:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 18:12:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:12:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:12:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:12:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:12:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-06 18:12:50,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:50,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002249541] [2021-12-06 18:12:50,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002249541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:12:50,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200712610] [2021-12-06 18:12:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:50,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:50,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:50,749 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:50,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:12:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:50,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 18:12:50,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:50,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:12:50,995 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:12:50,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-06 18:12:51,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 18:12:51,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 16 [2021-12-06 18:12:51,057 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-06 18:12:51,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 68 [2021-12-06 18:12:51,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:51,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2021-12-06 18:12:51,066 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 16 treesize of output 15 [2021-12-06 18:12:51,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-06 18:12:51,077 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 13 treesize of output 9 [2021-12-06 18:13:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 112 proven. 17 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 18:13:01,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:01,514 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_569 (Array Int Int)) (v_ArrVal_571 Int) (v_ArrVal_570 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_569) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_570) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_571)) |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.offset|) 0))) is different from false [2021-12-06 18:13:01,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:13:01,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-06 18:13:01,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:13:01,543 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 154 treesize of output 156 [2021-12-06 18:13:01,547 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 144 treesize of output 140 [2021-12-06 18:13:01,553 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 140 treesize of output 138 [2021-12-06 18:13:01,599 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 6 treesize of output 4 [2021-12-06 18:13:01,654 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 24 treesize of output 22 [2021-12-06 18:13:01,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:13:01,678 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 63 treesize of output 61 [2021-12-06 18:13:01,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200712610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:01,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:13:01,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2021-12-06 18:13:01,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121849031] [2021-12-06 18:13:01,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:13:01,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 18:13:01,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:01,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 18:13:01,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=524, Unknown=2, NotChecked=46, Total=650 [2021-12-06 18:13:01,834 INFO L87 Difference]: Start difference. First operand 233 states and 307 transitions. Second operand has 17 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2021-12-06 18:13:05,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:05,983 INFO L93 Difference]: Finished difference Result 541 states and 750 transitions. [2021-12-06 18:13:05,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 18:13:05,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 118 [2021-12-06 18:13:05,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:05,986 INFO L225 Difference]: With dead ends: 541 [2021-12-06 18:13:05,986 INFO L226 Difference]: Without dead ends: 342 [2021-12-06 18:13:05,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 227 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=168, Invalid=1239, Unknown=3, NotChecked=72, Total=1482 [2021-12-06 18:13:05,988 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 99 mSDsluCounter, 2201 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2431 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:05,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 2431 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 404 Invalid, 0 Unknown, 480 Unchecked, 0.3s Time] [2021-12-06 18:13:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-06 18:13:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 258. [2021-12-06 18:13:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 170 states have (on average 1.1823529411764706) internal successors, (201), 175 states have internal predecessors, (201), 62 states have call successors, (62), 23 states have call predecessors, (62), 25 states have return successors, (74), 59 states have call predecessors, (74), 61 states have call successors, (74) [2021-12-06 18:13:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 337 transitions. [2021-12-06 18:13:06,007 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 337 transitions. Word has length 118 [2021-12-06 18:13:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:06,007 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 337 transitions. [2021-12-06 18:13:06,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2021-12-06 18:13:06,008 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 337 transitions. [2021-12-06 18:13:06,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 18:13:06,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:06,009 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:06,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:13:06,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:06,211 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:06,212 INFO L85 PathProgramCache]: Analyzing trace with hash -924092300, now seen corresponding path program 1 times [2021-12-06 18:13:06,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:06,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397403627] [2021-12-06 18:13:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:06,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:13:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:13:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:13:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:13:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:13:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:13:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:13:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:13:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 18:13:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:13:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:13:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 18:13:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 18:13:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-06 18:13:06,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:06,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397403627] [2021-12-06 18:13:06,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397403627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:06,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381544723] [2021-12-06 18:13:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:06,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:06,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:06,391 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:06,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:13:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:06,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:13:06,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 18:13:06,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:06,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381544723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:06,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:06,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-06 18:13:06,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435142453] [2021-12-06 18:13:06,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:06,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:13:06,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:06,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:13:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:13:06,654 INFO L87 Difference]: Start difference. First operand 258 states and 337 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:13:06,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:06,824 INFO L93 Difference]: Finished difference Result 459 states and 607 transitions. [2021-12-06 18:13:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:13:06,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 120 [2021-12-06 18:13:06,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:06,826 INFO L225 Difference]: With dead ends: 459 [2021-12-06 18:13:06,826 INFO L226 Difference]: Without dead ends: 264 [2021-12-06 18:13:06,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:13:06,828 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 211 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:06,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 750 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:13:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-06 18:13:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2021-12-06 18:13:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 173 states have (on average 1.1791907514450868) internal successors, (204), 179 states have internal predecessors, (204), 62 states have call successors, (62), 23 states have call predecessors, (62), 26 states have return successors, (76), 59 states have call predecessors, (76), 61 states have call successors, (76) [2021-12-06 18:13:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 342 transitions. [2021-12-06 18:13:06,844 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 342 transitions. Word has length 120 [2021-12-06 18:13:06,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:06,845 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 342 transitions. [2021-12-06 18:13:06,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:13:06,845 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 342 transitions. [2021-12-06 18:13:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-06 18:13:06,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:06,847 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:06,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:13:07,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:07,049 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1411420641, now seen corresponding path program 1 times [2021-12-06 18:13:07,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:07,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470890255] [2021-12-06 18:13:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:07,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:13:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:13:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:13:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:13:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:13:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:13:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:13:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:13:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:13:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:13:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 18:13:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:13:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 18:13:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-06 18:13:07,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:07,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470890255] [2021-12-06 18:13:07,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470890255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:07,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951595915] [2021-12-06 18:13:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:07,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:07,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:07,308 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:07,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:13:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:07,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:13:07,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 18:13:07,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:07,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951595915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:07,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:07,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-12-06 18:13:07,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906367074] [2021-12-06 18:13:07,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:07,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:13:07,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:07,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:13:07,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:13:07,556 INFO L87 Difference]: Start difference. First operand 262 states and 342 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:13:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:07,775 INFO L93 Difference]: Finished difference Result 479 states and 642 transitions. [2021-12-06 18:13:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:13:07,775 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 122 [2021-12-06 18:13:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:07,777 INFO L225 Difference]: With dead ends: 479 [2021-12-06 18:13:07,777 INFO L226 Difference]: Without dead ends: 280 [2021-12-06 18:13:07,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:13:07,779 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 248 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:07,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 874 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:13:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-06 18:13:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2021-12-06 18:13:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 176 states have (on average 1.1818181818181819) internal successors, (208), 182 states have internal predecessors, (208), 62 states have call successors, (62), 23 states have call predecessors, (62), 26 states have return successors, (76), 59 states have call predecessors, (76), 61 states have call successors, (76) [2021-12-06 18:13:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 346 transitions. [2021-12-06 18:13:07,794 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 346 transitions. Word has length 122 [2021-12-06 18:13:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:07,794 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 346 transitions. [2021-12-06 18:13:07,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:13:07,794 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 346 transitions. [2021-12-06 18:13:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 18:13:07,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:07,796 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:07,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:13:07,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:07,997 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1165436143, now seen corresponding path program 1 times [2021-12-06 18:13:07,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:07,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125766140] [2021-12-06 18:13:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:07,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:13:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:13:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:13:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:13:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:13:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:13:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:13:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:13:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:13:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 18:13:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:13:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:13:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 18:13:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-06 18:13:08,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:08,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125766140] [2021-12-06 18:13:08,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125766140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:08,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967052700] [2021-12-06 18:13:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:08,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:08,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:08,127 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:08,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:13:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 18:13:08,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-06 18:13:08,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:08,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967052700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:08,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:08,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-06 18:13:08,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373080390] [2021-12-06 18:13:08,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:08,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:13:08,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:08,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:13:08,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:13:08,326 INFO L87 Difference]: Start difference. First operand 265 states and 346 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:13:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:08,345 INFO L93 Difference]: Finished difference Result 478 states and 642 transitions. [2021-12-06 18:13:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:13:08,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 123 [2021-12-06 18:13:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:08,348 INFO L225 Difference]: With dead ends: 478 [2021-12-06 18:13:08,348 INFO L226 Difference]: Without dead ends: 276 [2021-12-06 18:13:08,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:13:08,350 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 6 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:08,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 353 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:13:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-06 18:13:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 270. [2021-12-06 18:13:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 179 states have (on average 1.1787709497206704) internal successors, (211), 186 states have internal predecessors, (211), 63 states have call successors, (63), 23 states have call predecessors, (63), 27 states have return successors, (83), 60 states have call predecessors, (83), 62 states have call successors, (83) [2021-12-06 18:13:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 357 transitions. [2021-12-06 18:13:08,373 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 357 transitions. Word has length 123 [2021-12-06 18:13:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:08,374 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 357 transitions. [2021-12-06 18:13:08,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:13:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 357 transitions. [2021-12-06 18:13:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 18:13:08,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:08,376 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:08,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 18:13:08,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:08,577 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1662855644, now seen corresponding path program 1 times [2021-12-06 18:13:08,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:08,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127277668] [2021-12-06 18:13:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:08,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:13:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:13:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:13:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:13:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:13:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:13:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:13:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:13:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:13:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:13:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:13:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 18:13:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-06 18:13:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 18:13:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-06 18:13:08,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127277668] [2021-12-06 18:13:08,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127277668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114717656] [2021-12-06 18:13:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:08,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:08,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:08,753 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:08,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:13:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:08,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 18:13:08,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:08,923 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:13:08,923 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 9 treesize of output 15 [2021-12-06 18:13:08,930 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:13:08,930 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 9 treesize of output 15 [2021-12-06 18:13:10,042 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_1|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_1|) 0)))) is different from true [2021-12-06 18:13:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 105 proven. 17 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-06 18:13:10,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-06 18:13:11,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114717656] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:13:11,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:13:11,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 12] total 32 [2021-12-06 18:13:11,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341479536] [2021-12-06 18:13:11,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:13:11,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 18:13:11,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 18:13:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=834, Unknown=1, NotChecked=58, Total=992 [2021-12-06 18:13:11,277 INFO L87 Difference]: Start difference. First operand 270 states and 357 transitions. Second operand has 32 states, 32 states have (on average 4.125) internal successors, (132), 30 states have internal predecessors, (132), 12 states have call successors, (38), 4 states have call predecessors, (38), 7 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) [2021-12-06 18:13:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:12,397 INFO L93 Difference]: Finished difference Result 520 states and 708 transitions. [2021-12-06 18:13:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 18:13:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.125) internal successors, (132), 30 states have internal predecessors, (132), 12 states have call successors, (38), 4 states have call predecessors, (38), 7 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) Word has length 131 [2021-12-06 18:13:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:12,399 INFO L225 Difference]: With dead ends: 520 [2021-12-06 18:13:12,399 INFO L226 Difference]: Without dead ends: 302 [2021-12-06 18:13:12,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 269 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=281, Invalid=1978, Unknown=1, NotChecked=92, Total=2352 [2021-12-06 18:13:12,401 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 216 mSDsluCounter, 2407 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:12,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 2587 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1303 Invalid, 0 Unknown, 503 Unchecked, 0.6s Time] [2021-12-06 18:13:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-06 18:13:12,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 274. [2021-12-06 18:13:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 185 states have (on average 1.172972972972973) internal successors, (217), 192 states have internal predecessors, (217), 59 states have call successors, (59), 25 states have call predecessors, (59), 29 states have return successors, (81), 56 states have call predecessors, (81), 58 states have call successors, (81) [2021-12-06 18:13:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 357 transitions. [2021-12-06 18:13:12,417 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 357 transitions. Word has length 131 [2021-12-06 18:13:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:12,418 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 357 transitions. [2021-12-06 18:13:12,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.125) internal successors, (132), 30 states have internal predecessors, (132), 12 states have call successors, (38), 4 states have call predecessors, (38), 7 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) [2021-12-06 18:13:12,418 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 357 transitions. [2021-12-06 18:13:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 18:13:12,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:12,419 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:12,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:13:12,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 18:13:12,620 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:12,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1363735611, now seen corresponding path program 1 times [2021-12-06 18:13:12,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:12,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267455425] [2021-12-06 18:13:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:12,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:13:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:13:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:13:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:13:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:13:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:13:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:13:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:13:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:13:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:13:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:13:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 18:13:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 18:13:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 18:13:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-06 18:13:12,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:12,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267455425] [2021-12-06 18:13:12,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267455425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:12,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970615293] [2021-12-06 18:13:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:12,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:12,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:12,774 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:12,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:13:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:12,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 18:13:12,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 18:13:13,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:13,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970615293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:13,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:13,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 14 [2021-12-06 18:13:13,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942951878] [2021-12-06 18:13:13,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:13,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:13:13,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:13,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:13:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:13:13,098 INFO L87 Difference]: Start difference. First operand 274 states and 357 transitions. Second operand has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 10 states have internal predecessors, (63), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-06 18:13:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:13,373 INFO L93 Difference]: Finished difference Result 459 states and 604 transitions. [2021-12-06 18:13:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:13:13,374 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 10 states have internal predecessors, (63), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 129 [2021-12-06 18:13:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:13,376 INFO L225 Difference]: With dead ends: 459 [2021-12-06 18:13:13,376 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 18:13:13,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:13:13,378 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 179 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:13,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1204 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:13:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 18:13:13,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 241. [2021-12-06 18:13:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 165 states have (on average 1.1636363636363636) internal successors, (192), 169 states have internal predecessors, (192), 52 states have call successors, (52), 22 states have call predecessors, (52), 23 states have return successors, (63), 49 states have call predecessors, (63), 51 states have call successors, (63) [2021-12-06 18:13:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 307 transitions. [2021-12-06 18:13:13,398 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 307 transitions. Word has length 129 [2021-12-06 18:13:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:13,398 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 307 transitions. [2021-12-06 18:13:13,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 10 states have internal predecessors, (63), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-06 18:13:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 307 transitions. [2021-12-06 18:13:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 18:13:13,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:13,400 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:13,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 18:13:13,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 18:13:13,601 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:13,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1187163488, now seen corresponding path program 1 times [2021-12-06 18:13:13,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:13,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482584652] [2021-12-06 18:13:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:13,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:13:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:13:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:13:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:13:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:13:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:13:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:13:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:13:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:13:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:13:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:13:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:13:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 18:13:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 18:13:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-06 18:13:13,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:13,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482584652] [2021-12-06 18:13:13,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482584652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:13,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373575720] [2021-12-06 18:13:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:13,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:13,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:13,774 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:13,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:13:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:13,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-06 18:13:13,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:13,962 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:13:13,962 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 9 treesize of output 15 [2021-12-06 18:13:13,970 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:13:13,971 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 9 treesize of output 15 [2021-12-06 18:13:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 109 proven. 15 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 18:13:15,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-06 18:13:15,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373575720] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:13:15,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:13:15,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 19, 13] total 34 [2021-12-06 18:13:15,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687996980] [2021-12-06 18:13:15,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:13:15,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:13:15,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:15,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:13:15,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:13:15,944 INFO L87 Difference]: Start difference. First operand 241 states and 307 transitions. Second operand has 34 states, 33 states have (on average 4.363636363636363) internal successors, (144), 31 states have internal predecessors, (144), 13 states have call successors, (38), 4 states have call predecessors, (38), 9 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-06 18:13:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:17,621 INFO L93 Difference]: Finished difference Result 514 states and 726 transitions. [2021-12-06 18:13:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 18:13:17,621 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.363636363636363) internal successors, (144), 31 states have internal predecessors, (144), 13 states have call successors, (38), 4 states have call predecessors, (38), 9 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) Word has length 132 [2021-12-06 18:13:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:17,624 INFO L225 Difference]: With dead ends: 514 [2021-12-06 18:13:17,624 INFO L226 Difference]: Without dead ends: 365 [2021-12-06 18:13:17,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 267 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=324, Invalid=2538, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:13:17,626 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 151 mSDsluCounter, 4164 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 4401 SdHoareTripleChecker+Invalid, 3072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 711 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:17,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 4401 Invalid, 3072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2181 Invalid, 0 Unknown, 711 Unchecked, 1.2s Time] [2021-12-06 18:13:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-06 18:13:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 291. [2021-12-06 18:13:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 201 states have (on average 1.1592039800995024) internal successors, (233), 207 states have internal predecessors, (233), 59 states have call successors, (59), 27 states have call predecessors, (59), 30 states have return successors, (85), 56 states have call predecessors, (85), 58 states have call successors, (85) [2021-12-06 18:13:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 377 transitions. [2021-12-06 18:13:17,651 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 377 transitions. Word has length 132 [2021-12-06 18:13:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:17,651 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 377 transitions. [2021-12-06 18:13:17,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.363636363636363) internal successors, (144), 31 states have internal predecessors, (144), 13 states have call successors, (38), 4 states have call predecessors, (38), 9 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-06 18:13:17,652 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 377 transitions. [2021-12-06 18:13:17,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 18:13:17,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:17,653 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:17,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 18:13:17,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:17,854 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash 800652698, now seen corresponding path program 1 times [2021-12-06 18:13:17,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:17,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713678254] [2021-12-06 18:13:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:17,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:13:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:13:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:13:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:13:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:13:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:13:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:13:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:13:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:13:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:13:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:13:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:13:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 18:13:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 18:13:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-06 18:13:18,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:18,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713678254] [2021-12-06 18:13:18,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713678254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:18,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478791679] [2021-12-06 18:13:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:18,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:18,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:18,034 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:18,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:13:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:13:18,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-06 18:13:18,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:18,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478791679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:18,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:18,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2021-12-06 18:13:18,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122218286] [2021-12-06 18:13:18,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:18,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:13:18,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:18,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:13:18,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:13:18,314 INFO L87 Difference]: Start difference. First operand 291 states and 377 transitions. Second operand has 9 states, 8 states have (on average 9.25) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-06 18:13:18,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:18,491 INFO L93 Difference]: Finished difference Result 479 states and 621 transitions. [2021-12-06 18:13:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:13:18,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 134 [2021-12-06 18:13:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:18,493 INFO L225 Difference]: With dead ends: 479 [2021-12-06 18:13:18,493 INFO L226 Difference]: Without dead ends: 288 [2021-12-06 18:13:18,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:13:18,494 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 227 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:18,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 872 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:13:18,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-06 18:13:18,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-12-06 18:13:18,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 199 states have (on average 1.1557788944723617) internal successors, (230), 204 states have internal predecessors, (230), 59 states have call successors, (59), 27 states have call predecessors, (59), 29 states have return successors, (81), 56 states have call predecessors, (81), 58 states have call successors, (81) [2021-12-06 18:13:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 370 transitions. [2021-12-06 18:13:18,510 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 370 transitions. Word has length 134 [2021-12-06 18:13:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:18,511 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 370 transitions. [2021-12-06 18:13:18,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-06 18:13:18,511 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 370 transitions. [2021-12-06 18:13:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 18:13:18,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:18,512 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:18,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 18:13:18,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 18:13:18,713 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:18,713 INFO L85 PathProgramCache]: Analyzing trace with hash 315027163, now seen corresponding path program 1 times [2021-12-06 18:13:18,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:18,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310002317] [2021-12-06 18:13:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:18,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:13:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:13:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:13:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:13:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:13:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:13:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:13:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:13:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:13:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:13:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:13:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 18:13:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 18:13:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-06 18:13:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-06 18:13:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-06 18:13:18,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:18,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310002317] [2021-12-06 18:13:18,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310002317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:18,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291895824] [2021-12-06 18:13:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:18,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:18,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:18,870 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:18,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:13:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:19,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:13:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 121 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-06 18:13:19,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-06 18:13:19,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291895824] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:13:19,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:13:19,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 7] total 18 [2021-12-06 18:13:19,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681277648] [2021-12-06 18:13:19,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:13:19,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:13:19,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:19,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:13:19,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:13:19,357 INFO L87 Difference]: Start difference. First operand 288 states and 370 transitions. Second operand has 18 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-12-06 18:13:19,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:19,526 INFO L93 Difference]: Finished difference Result 481 states and 626 transitions. [2021-12-06 18:13:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:13:19,526 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 145 [2021-12-06 18:13:19,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:19,528 INFO L225 Difference]: With dead ends: 481 [2021-12-06 18:13:19,528 INFO L226 Difference]: Without dead ends: 296 [2021-12-06 18:13:19,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:13:19,529 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 12 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:19,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2473 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:13:19,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-06 18:13:19,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 288. [2021-12-06 18:13:19,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 199 states have (on average 1.1557788944723617) internal successors, (230), 204 states have internal predecessors, (230), 59 states have call successors, (59), 27 states have call predecessors, (59), 29 states have return successors, (79), 56 states have call predecessors, (79), 58 states have call successors, (79) [2021-12-06 18:13:19,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 368 transitions. [2021-12-06 18:13:19,555 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 368 transitions. Word has length 145 [2021-12-06 18:13:19,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:19,555 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 368 transitions. [2021-12-06 18:13:19,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-12-06 18:13:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 368 transitions. [2021-12-06 18:13:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 18:13:19,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:19,557 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:19,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 18:13:19,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:19,759 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:19,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash 900691480, now seen corresponding path program 1 times [2021-12-06 18:13:19,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:19,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322695194] [2021-12-06 18:13:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:19,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:19,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:13:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:19,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:13:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:19,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:13:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:19,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:19,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:13:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:19,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:13:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:19,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:19,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:13:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:19,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:13:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:20,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:13:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:20,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:13:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:20,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:13:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:20,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:13:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:20,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 18:13:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:20,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 18:13:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:20,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:20,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 18:13:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:20,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 18:13:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 32 proven. 35 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-06 18:13:20,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:20,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322695194] [2021-12-06 18:13:20,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322695194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:20,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955949430] [2021-12-06 18:13:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:20,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:20,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:20,264 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:20,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 18:13:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:20,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 18:13:20,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:20,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:13:20,525 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-06 18:13:20,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:13:21,587 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 9 treesize of output 5 [2021-12-06 18:13:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 127 proven. 33 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-06 18:13:22,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:23,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:13:23,851 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 493 treesize of output 477 [2021-12-06 18:13:23,859 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:13:23,860 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 589 treesize of output 565 [2021-12-06 18:13:23,868 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:13:23,869 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 565 treesize of output 553 [2021-12-06 18:13:23,954 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:13:23,955 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 93 treesize of output 85 [2021-12-06 18:13:23,970 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 49 treesize of output 47 [2021-12-06 18:13:23,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:13:23,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 50 treesize of output 44 [2021-12-06 18:13:23,985 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 138 treesize of output 130 [2021-12-06 18:13:23,990 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 8 treesize of output 6 [2021-12-06 18:13:23,994 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 8 treesize of output 6 [2021-12-06 18:13:24,000 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 8 treesize of output 6 [2021-12-06 18:13:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-06 18:13:24,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955949430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:13:24,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:13:24,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 18] total 51 [2021-12-06 18:13:24,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554424254] [2021-12-06 18:13:24,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:13:24,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 18:13:24,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:24,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 18:13:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2368, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 18:13:24,129 INFO L87 Difference]: Start difference. First operand 288 states and 368 transitions. Second operand has 51 states, 50 states have (on average 3.86) internal successors, (193), 47 states have internal predecessors, (193), 23 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 23 states have call predecessors, (48), 23 states have call successors, (48) [2021-12-06 18:13:29,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:29,026 INFO L93 Difference]: Finished difference Result 792 states and 1014 transitions. [2021-12-06 18:13:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-06 18:13:29,026 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.86) internal successors, (193), 47 states have internal predecessors, (193), 23 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 23 states have call predecessors, (48), 23 states have call successors, (48) Word has length 148 [2021-12-06 18:13:29,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:29,029 INFO L225 Difference]: With dead ends: 792 [2021-12-06 18:13:29,029 INFO L226 Difference]: Without dead ends: 475 [2021-12-06 18:13:29,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 299 SyntacticMatches, 19 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4413 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=957, Invalid=14049, Unknown=0, NotChecked=0, Total=15006 [2021-12-06 18:13:29,034 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 678 mSDsluCounter, 8429 mSDsCounter, 0 mSdLazyCounter, 4399 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 8731 SdHoareTripleChecker+Invalid, 5738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 4399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 893 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:29,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 8731 Invalid, 5738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 4399 Invalid, 0 Unknown, 893 Unchecked, 2.2s Time] [2021-12-06 18:13:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-06 18:13:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 418. [2021-12-06 18:13:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 292 states have (on average 1.1849315068493151) internal successors, (346), 298 states have internal predecessors, (346), 84 states have call successors, (84), 38 states have call predecessors, (84), 41 states have return successors, (99), 81 states have call predecessors, (99), 82 states have call successors, (99) [2021-12-06 18:13:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 529 transitions. [2021-12-06 18:13:29,059 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 529 transitions. Word has length 148 [2021-12-06 18:13:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:29,059 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 529 transitions. [2021-12-06 18:13:29,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.86) internal successors, (193), 47 states have internal predecessors, (193), 23 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 23 states have call predecessors, (48), 23 states have call successors, (48) [2021-12-06 18:13:29,060 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 529 transitions. [2021-12-06 18:13:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-06 18:13:29,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:29,061 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:29,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 18:13:29,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 18:13:29,262 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:29,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:29,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1268885027, now seen corresponding path program 1 times [2021-12-06 18:13:29,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:29,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258776713] [2021-12-06 18:13:29,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:29,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:13:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:13:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 18:13:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:13:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:13:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:13:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 18:13:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:13:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:13:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 18:13:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:13:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:13:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 18:13:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 18:13:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 18:13:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-06 18:13:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-06 18:13:29,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:29,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258776713] [2021-12-06 18:13:29,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258776713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:29,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914011119] [2021-12-06 18:13:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:29,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:29,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:29,501 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:29,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 18:13:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:29,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 18:13:29,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-06 18:13:29,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:29,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914011119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:29,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:29,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 13 [2021-12-06 18:13:29,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173109716] [2021-12-06 18:13:29,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:29,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:13:29,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:29,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:13:29,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:13:29,934 INFO L87 Difference]: Start difference. First operand 418 states and 529 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-06 18:13:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:30,106 INFO L93 Difference]: Finished difference Result 779 states and 1007 transitions. [2021-12-06 18:13:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:13:30,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 162 [2021-12-06 18:13:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:30,109 INFO L225 Difference]: With dead ends: 779 [2021-12-06 18:13:30,109 INFO L226 Difference]: Without dead ends: 460 [2021-12-06 18:13:30,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:13:30,110 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 17 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:30,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1192 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2021-12-06 18:13:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-06 18:13:30,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-12-06 18:13:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 304 states have (on average 1.1875) internal successors, (361), 310 states have internal predecessors, (361), 84 states have call successors, (84), 38 states have call predecessors, (84), 43 states have return successors, (103), 83 states have call predecessors, (103), 82 states have call successors, (103) [2021-12-06 18:13:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 548 transitions. [2021-12-06 18:13:30,135 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 548 transitions. Word has length 162 [2021-12-06 18:13:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:30,135 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 548 transitions. [2021-12-06 18:13:30,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-06 18:13:30,136 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 548 transitions. [2021-12-06 18:13:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 18:13:30,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:30,137 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:30,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 18:13:30,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 18:13:30,339 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:30,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:30,340 INFO L85 PathProgramCache]: Analyzing trace with hash 526975427, now seen corresponding path program 1 times [2021-12-06 18:13:30,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:30,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803692045] [2021-12-06 18:13:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:30,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:13:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:13:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:13:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:13:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:13:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:13:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:13:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:13:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:13:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:13:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:13:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:13:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 18:13:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-06 18:13:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-06 18:13:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-06 18:13:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-06 18:13:30,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:30,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803692045] [2021-12-06 18:13:30,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803692045] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:30,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525199618] [2021-12-06 18:13:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:30,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:30,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:30,543 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:30,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 18:13:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:30,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 18:13:30,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:30,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:13:30,823 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 18:13:30,830 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:13:30,830 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 14 treesize of output 20 [2021-12-06 18:13:30,833 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 5 treesize of output 3 [2021-12-06 18:13:30,841 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:13:30,841 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 [2021-12-06 18:13:30,886 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-06 18:13:30,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 62 [2021-12-06 18:13:30,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:13:30,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-12-06 18:13:30,892 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 16 treesize of output 15 [2021-12-06 18:13:30,897 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 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-06 18:13:30,899 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 13 treesize of output 9 [2021-12-06 18:13:32,915 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base_BEFORE_CALL_51| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base_BEFORE_CALL_51|) 0) |v_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base_BEFORE_CALL_51|))) is different from true [2021-12-06 18:13:34,952 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base_BEFORE_CALL_52| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base_BEFORE_CALL_52|) 0) |v_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base_BEFORE_CALL_52|))) is different from true [2021-12-06 18:13:36,993 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_47| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_47| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_47|) 0)))) is different from true [2021-12-06 18:13:39,028 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_48| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_48| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_48|) 0)))) is different from true [2021-12-06 18:13:41,061 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_49| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_49|) 0) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_49|))) is different from true [2021-12-06 18:13:43,133 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_50| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_50|) 0) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_50|))) is different from true [2021-12-06 18:13:45,179 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_front_~list#1.base_BEFORE_CALL_48| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_front_~list#1.base_BEFORE_CALL_48| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_~list#1.base_BEFORE_CALL_48|) 0)))) is different from true [2021-12-06 18:13:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 104 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 107 not checked. [2021-12-06 18:13:57,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:59,802 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1647 (Array Int Int)) (v_ArrVal_1650 (Array Int Int)) (v_ArrVal_1648 Int)) (not (= |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1647) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1650) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1648)) |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.offset|)))) is different from false [2021-12-06 18:13:59,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:13:59,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-06 18:13:59,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:13:59,825 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 147 treesize of output 151 [2021-12-06 18:13:59,828 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 144 treesize of output 140 [2021-12-06 18:13:59,834 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 140 treesize of output 138 [2021-12-06 18:13:59,867 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 6 treesize of output 4 [2021-12-06 18:13:59,921 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 24 treesize of output 22 [2021-12-06 18:13:59,935 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-12-06 18:13:59,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:13:59,965 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 58 treesize of output 58 [2021-12-06 18:14:00,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525199618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:00,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:14:00,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 22] total 28 [2021-12-06 18:14:00,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076464898] [2021-12-06 18:14:00,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:14:00,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 18:14:00,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:14:00,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 18:14:00,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=854, Unknown=9, NotChecked=520, Total=1482 [2021-12-06 18:14:00,104 INFO L87 Difference]: Start difference. First operand 432 states and 548 transitions. Second operand has 28 states, 26 states have (on average 6.269230769230769) internal successors, (163), 27 states have internal predecessors, (163), 12 states have call successors, (35), 10 states have call predecessors, (35), 13 states have return successors, (34), 11 states have call predecessors, (34), 12 states have call successors, (34) [2021-12-06 18:14:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:16,756 INFO L93 Difference]: Finished difference Result 815 states and 1077 transitions. [2021-12-06 18:14:16,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:14:16,756 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 6.269230769230769) internal successors, (163), 27 states have internal predecessors, (163), 12 states have call successors, (35), 10 states have call predecessors, (35), 13 states have return successors, (34), 11 states have call predecessors, (34), 12 states have call successors, (34) Word has length 160 [2021-12-06 18:14:16,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:16,758 INFO L225 Difference]: With dead ends: 815 [2021-12-06 18:14:16,759 INFO L226 Difference]: Without dead ends: 491 [2021-12-06 18:14:16,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 308 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=154, Invalid=1505, Unknown=13, NotChecked=680, Total=2352 [2021-12-06 18:14:16,760 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 60 mSDsluCounter, 3569 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 3797 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2284 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:16,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 3797 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 643 Invalid, 0 Unknown, 2284 Unchecked, 0.4s Time] [2021-12-06 18:14:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-06 18:14:16,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 443. [2021-12-06 18:14:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 311 states have (on average 1.180064308681672) internal successors, (367), 318 states have internal predecessors, (367), 85 states have call successors, (85), 41 states have call predecessors, (85), 46 states have return successors, (104), 83 states have call predecessors, (104), 83 states have call successors, (104) [2021-12-06 18:14:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 556 transitions. [2021-12-06 18:14:16,787 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 556 transitions. Word has length 160 [2021-12-06 18:14:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:16,787 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 556 transitions. [2021-12-06 18:14:16,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 6.269230769230769) internal successors, (163), 27 states have internal predecessors, (163), 12 states have call successors, (35), 10 states have call predecessors, (35), 13 states have return successors, (34), 11 states have call predecessors, (34), 12 states have call successors, (34) [2021-12-06 18:14:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 556 transitions. [2021-12-06 18:14:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-06 18:14:16,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:16,788 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:14:16,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-06 18:14:16,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:14:16,989 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:14:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:16,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1711612917, now seen corresponding path program 1 times [2021-12-06 18:14:16,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:14:16,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609385732] [2021-12-06 18:14:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:16,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:14:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:14:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:14:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 18:14:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:14:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:14:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:14:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 18:14:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:14:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:14:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:14:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 18:14:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:14:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 18:14:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:14:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 18:14:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-06 18:14:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 61 proven. 12 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-06 18:14:17,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:17,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609385732] [2021-12-06 18:14:17,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609385732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:17,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490679583] [2021-12-06 18:14:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:17,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:17,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:14:17,413 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:14:17,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b4b631-b5c1-48a4-b453-a268e46f222d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 18:14:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:17,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-06 18:14:17,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:17,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:14:17,843 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 18:14:17,850 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:14:17,850 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 14 treesize of output 20 [2021-12-06 18:14:17,856 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 5 treesize of output 3 [2021-12-06 18:14:17,867 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:14:17,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 18:14:17,874 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 18:14:17,877 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 14 treesize of output 16 [2021-12-06 18:14:17,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:14:17,948 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 18:14:17,948 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 46 [2021-12-06 18:14:17,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:17,957 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:14:17,957 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-12-06 18:14:17,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:17,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:17,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-12-06 18:14:17,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:17,970 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 18:14:17,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 18:14:18,064 INFO L354 Elim1Store]: treesize reduction 140, result has 13.0 percent of original size [2021-12-06 18:14:18,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 231 treesize of output 175 [2021-12-06 18:14:18,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:18,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 195 [2021-12-06 18:14:18,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:18,084 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-12-06 18:14:18,085 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 240 treesize of output 159 [2021-12-06 18:14:18,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 17 [2021-12-06 18:14:18,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:18,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:18,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 38 [2021-12-06 18:14:18,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:14:19,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:14:19,985 INFO L354 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2021-12-06 18:14:19,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 24 case distinctions, treesize of input 151 treesize of output 1 [2021-12-06 18:14:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 148 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 18:14:20,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:14:20,726 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int) (v_ArrVal_1834 (Array Int Int)) (v_ArrVal_1831 Int) (v_ArrVal_1836 (Array Int Int))) (let ((.cse4 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (let ((.cse0 (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))))) (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse4 v_ArrVal_1831)))) (.cse3 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1836) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1834) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.offset|)) (.cse2 (select (select .cse0 |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.offset|))) (or (not (= (+ 16 |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.offset|) (select (select .cse0 .cse1) .cse2))) (not (= |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base| (select (select .cse3 .cse1) .cse2)))))))) is different from false [2021-12-06 18:14:20,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:14:20,763 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 227 treesize of output 205 [2021-12-06 18:14:21,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:14:21,063 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 241 [2021-12-06 18:14:21,548 INFO L354 Elim1Store]: treesize reduction 130, result has 73.0 percent of original size [2021-12-06 18:14:21,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 41700 treesize of output 38119 [2021-12-06 18:14:21,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:14:21,849 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37733 treesize of output 34573 [2021-12-06 18:14:24,254 INFO L354 Elim1Store]: treesize reduction 139, result has 74.9 percent of original size [2021-12-06 18:14:24,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 7157165 treesize of output 6877928 [2021-12-06 18:14:38,430 WARN L227 SmtUtils]: Spent 14.17s on a formula simplification that was a NOOP. DAG size: 5338 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:14:39,667 INFO L354 Elim1Store]: treesize reduction 154, result has 53.5 percent of original size [2021-12-06 18:14:39,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 7783993 treesize of output 7606541 [2021-12-06 18:20:15,114 WARN L227 SmtUtils]: Spent 5.59m on a formula simplification. DAG size of input: 5456 DAG size of output: 5454 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:20:16,998 INFO L354 Elim1Store]: treesize reduction 74, result has 73.3 percent of original size [2021-12-06 18:20:17,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 8970903 treesize of output 8556283 [2021-12-06 18:21:05,607 WARN L227 SmtUtils]: Spent 48.60s on a formula simplification. DAG size of input: 5580 DAG size of output: 5579 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:21:29,789 WARN L227 SmtUtils]: Spent 24.16s on a formula simplification that was a NOOP. DAG size: 5571 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:21:31,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:21:31,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 10199988 treesize of output 9657022 [2021-12-06 18:22:32,337 WARN L227 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 5633 DAG size of output: 5631 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:23:02,950 WARN L227 SmtUtils]: Spent 30.59s on a formula simplification that was a NOOP. DAG size: 5620 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:23:04,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:23:04,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 11871004 treesize of output 11674713