./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_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_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/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_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/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_b98f5e35-f578-44c2-8764-7e54125ece79/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 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:00:44,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:00:44,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:00:44,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:00:44,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:00:44,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:00:44,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:00:44,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:00:44,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:00:44,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:00:44,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:00:44,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:00:44,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:00:44,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:00:44,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:00:44,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:00:44,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:00:44,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:00:44,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:00:44,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:00:44,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:00:44,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:00:44,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:00:44,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:00:44,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:00:44,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:00:44,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:00:44,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:00:44,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:00:44,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:00:44,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:00:44,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:00:44,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:00:44,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:00:44,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:00:44,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:00:44,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:00:44,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:00:44,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:00:44,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:00:44,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:00:44,664 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-07 01:00:44,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:00:44,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:00:44,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:00:44,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:00:44,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:00:44,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:00:44,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:00:44,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:00:44,689 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:00:44,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:00:44,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:00:44,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:00:44,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:00:44,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:00:44,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:00:44,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:00:44,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:00:44,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:00:44,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:00:44,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:00:44,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:00:44,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:00:44,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:00:44,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:00:44,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:00:44,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:00:44,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:00:44,692 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:00:44,692 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:00:44,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:00:44,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:00:44,693 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_b98f5e35-f578-44c2-8764-7e54125ece79/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 [2021-12-07 01:00:44,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:00:44,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:00:44,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:00:44,911 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:00:44,912 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:00:44,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2021-12-07 01:00:44,956 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/data/b32769511/40831b689d6c4e9bb07436e1b2ea22c6/FLAG02eb52a67 [2021-12-07 01:00:45,516 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:00:45,517 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2021-12-07 01:00:45,539 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/data/b32769511/40831b689d6c4e9bb07436e1b2ea22c6/FLAG02eb52a67 [2021-12-07 01:00:45,988 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/data/b32769511/40831b689d6c4e9bb07436e1b2ea22c6 [2021-12-07 01:00:45,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:00:45,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:00:45,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:00:45,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:00:45,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:00:45,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:00:45" (1/1) ... [2021-12-07 01:00:45,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253be9fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:45, skipping insertion in model container [2021-12-07 01:00:45,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:00:45" (1/1) ... [2021-12-07 01:00:46,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:00:46,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:00:46,278 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_b98f5e35-f578-44c2-8764-7e54125ece79/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4498,4511] [2021-12-07 01:00:46,283 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_b98f5e35-f578-44c2-8764-7e54125ece79/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4558,4571] [2021-12-07 01:00:47,013 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,014 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,014 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,015 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,016 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,026 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,027 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,028 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,029 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,327 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 01:00:47,328 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 01:00:47,329 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 01:00:47,330 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 01:00:47,331 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 01:00:47,331 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 01:00:47,332 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 01:00:47,332 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 01:00:47,333 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 01:00:47,333 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 01:00:47,460 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 01:00:47,538 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,538 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:00:47,628 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:00:47,638 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_b98f5e35-f578-44c2-8764-7e54125ece79/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4498,4511] [2021-12-07 01:00:47,639 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_b98f5e35-f578-44c2-8764-7e54125ece79/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4558,4571] [2021-12-07 01:00:47,664 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,665 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,665 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,666 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,666 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,671 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,671 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,672 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,672 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,696 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 01:00:47,697 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 01:00:47,697 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 01:00:47,698 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 01:00:47,699 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 01:00:47,699 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 01:00:47,699 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 01:00:47,700 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 01:00:47,700 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 01:00:47,700 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 01:00:47,713 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 01:00:47,747 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,748 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:00:47,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:00:47,936 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:00:47,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:47 WrapperNode [2021-12-07 01:00:47,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:00:47,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:00:47,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:00:47,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:00:47,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:47" (1/1) ... [2021-12-07 01:00:48,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:47" (1/1) ... [2021-12-07 01:00:48,091 INFO L137 Inliner]: procedures = 691, calls = 2614, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 796 [2021-12-07 01:00:48,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:00:48,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:00:48,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:00:48,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:00:48,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:47" (1/1) ... [2021-12-07 01:00:48,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:47" (1/1) ... [2021-12-07 01:00:48,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:47" (1/1) ... [2021-12-07 01:00:48,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:47" (1/1) ... [2021-12-07 01:00:48,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:47" (1/1) ... [2021-12-07 01:00:48,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:47" (1/1) ... [2021-12-07 01:00:48,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:47" (1/1) ... [2021-12-07 01:00:48,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:00:48,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:00:48,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:00:48,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:00:48,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:47" (1/1) ... [2021-12-07 01:00:48,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:00:48,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:48,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:00:48,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:00:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-07 01:00:48,211 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-07 01:00:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:00:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-07 01:00:48,211 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-07 01:00:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 01:00:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 01:00:48,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 01:00:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2021-12-07 01:00:48,212 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2021-12-07 01:00:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:00:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:00:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:00:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:00:48,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:00:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-07 01:00:48,212 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-07 01:00:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 01:00:48,212 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 01:00:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:00:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:00:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:00:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-07 01:00:48,213 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-07 01:00:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-07 01:00:48,213 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-07 01:00:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 01:00:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-12-07 01:00:48,213 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-12-07 01:00:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-12-07 01:00:48,213 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-12-07 01:00:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:00:48,356 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:00:48,358 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:00:49,212 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:00:49,217 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:00:49,217 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 01:00:49,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:00:49 BoogieIcfgContainer [2021-12-07 01:00:49,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:00:49,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:00:49,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:00:49,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:00:49,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:00:45" (1/3) ... [2021-12-07 01:00:49,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3a433f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:00:49, skipping insertion in model container [2021-12-07 01:00:49,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:00:47" (2/3) ... [2021-12-07 01:00:49,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3a433f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:00:49, skipping insertion in model container [2021-12-07 01:00:49,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:00:49" (3/3) ... [2021-12-07 01:00:49,235 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_secure_zero_harness.i [2021-12-07 01:00:49,239 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:00:49,239 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:00:49,273 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:00:49,278 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 01:00:49,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:00:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 71 states have internal predecessors, (86), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-07 01:00:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-07 01:00:49,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:49,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 01:00:49,299 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:49,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:49,303 INFO L85 PathProgramCache]: Analyzing trace with hash -70528239, now seen corresponding path program 1 times [2021-12-07 01:00:49,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:49,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432960431] [2021-12-07 01:00:49,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:49,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:49,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:00:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:49,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:00:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:49,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:00:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:49,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:00:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:49,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:00:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:49,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:00:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:49,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:00:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:49,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-07 01:00:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:49,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:00:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-07 01:00:49,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:49,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432960431] [2021-12-07 01:00:49,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432960431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:00:49,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:00:49,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:00:49,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677911959] [2021-12-07 01:00:49,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:00:49,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:00:49,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:49,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:00:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:00:49,801 INFO L87 Difference]: Start difference. First operand has 103 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 71 states have internal predecessors, (86), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:49,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:49,946 INFO L93 Difference]: Finished difference Result 202 states and 265 transitions. [2021-12-07 01:00:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:00:49,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-12-07 01:00:49,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:49,955 INFO L225 Difference]: With dead ends: 202 [2021-12-07 01:00:49,955 INFO L226 Difference]: Without dead ends: 98 [2021-12-07 01:00:49,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:00:49,960 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:49,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 138 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:00:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-07 01:00:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-07 01:00:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.196969696969697) internal successors, (79), 67 states have internal predecessors, (79), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-07 01:00:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2021-12-07 01:00:49,995 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 65 [2021-12-07 01:00:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:49,996 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2021-12-07 01:00:49,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2021-12-07 01:00:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-07 01:00:49,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:49,999 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 01:00:49,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:00:49,999 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:50,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:50,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1061132297, now seen corresponding path program 1 times [2021-12-07 01:00:50,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:50,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591805895] [2021-12-07 01:00:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:50,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:50,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:00:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:50,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:00:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:50,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:00:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:50,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:00:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:50,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:00:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:50,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:00:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:50,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:00:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:50,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-07 01:00:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:50,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:00:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-07 01:00:50,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591805895] [2021-12-07 01:00:50,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591805895] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150496732] [2021-12-07 01:00:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:50,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:50,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:50,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:50,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:00:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:50,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 2469 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:00:50,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-07 01:00:50,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:00:50,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150496732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:00:50,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:00:50,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-07 01:00:50,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578523995] [2021-12-07 01:00:50,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:00:50,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:00:50,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:00:50,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:00:50,866 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-07 01:00:50,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:50,957 INFO L93 Difference]: Finished difference Result 174 states and 217 transitions. [2021-12-07 01:00:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:00:50,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2021-12-07 01:00:50,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:50,960 INFO L225 Difference]: With dead ends: 174 [2021-12-07 01:00:50,960 INFO L226 Difference]: Without dead ends: 101 [2021-12-07 01:00:50,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:00:50,963 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 140 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:50,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 276 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:00:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-07 01:00:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-07 01:00:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 21 states have call successors, (21), 10 states have call predecessors, (21), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-07 01:00:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2021-12-07 01:00:50,982 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 65 [2021-12-07 01:00:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:50,982 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2021-12-07 01:00:50,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-07 01:00:50,983 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2021-12-07 01:00:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-07 01:00:50,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:50,986 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:00:51,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:00:51,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:51,187 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:51,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:51,188 INFO L85 PathProgramCache]: Analyzing trace with hash -883820620, now seen corresponding path program 1 times [2021-12-07 01:00:51,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:51,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730038333] [2021-12-07 01:00:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:51,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:51,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:00:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:51,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:00:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:51,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:00:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:51,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:00:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:51,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:00:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:51,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:00:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:51,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-07 01:00:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:51,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:00:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:51,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-07 01:00:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-07 01:00:51,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:51,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730038333] [2021-12-07 01:00:51,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730038333] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:51,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388210706] [2021-12-07 01:00:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:51,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:51,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:51,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:51,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:00:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:51,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 01:00:51,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-07 01:00:52,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:00:52,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388210706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:00:52,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:00:52,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-12-07 01:00:52,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579915568] [2021-12-07 01:00:52,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:00:52,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:00:52,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:52,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:00:52,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:00:52,083 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-07 01:00:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:52,191 INFO L93 Difference]: Finished difference Result 172 states and 211 transitions. [2021-12-07 01:00:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:00:52,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 71 [2021-12-07 01:00:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:52,193 INFO L225 Difference]: With dead ends: 172 [2021-12-07 01:00:52,193 INFO L226 Difference]: Without dead ends: 98 [2021-12-07 01:00:52,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:00:52,195 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 150 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:52,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 428 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:00:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-07 01:00:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-07 01:00:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 67 states have internal predecessors, (78), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-07 01:00:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2021-12-07 01:00:52,204 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 71 [2021-12-07 01:00:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:52,204 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2021-12-07 01:00:52,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-07 01:00:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2021-12-07 01:00:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-07 01:00:52,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:52,206 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 01:00:52,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:00:52,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:52,408 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:52,410 INFO L85 PathProgramCache]: Analyzing trace with hash 81192906, now seen corresponding path program 1 times [2021-12-07 01:00:52,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:52,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808799801] [2021-12-07 01:00:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:52,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:52,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:00:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:52,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:00:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:52,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:00:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:52,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:00:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:52,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:00:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:52,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:00:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:52,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-07 01:00:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:52,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:00:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:52,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:00:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-07 01:00:52,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:52,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808799801] [2021-12-07 01:00:52,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808799801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:00:52,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:00:52,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-07 01:00:52,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104073065] [2021-12-07 01:00:52,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:00:52,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:00:52,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:52,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:00:52,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:00:52,751 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-07 01:00:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:53,001 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2021-12-07 01:00:53,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:00:53,002 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 83 [2021-12-07 01:00:53,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:53,003 INFO L225 Difference]: With dead ends: 110 [2021-12-07 01:00:53,004 INFO L226 Difference]: Without dead ends: 108 [2021-12-07 01:00:53,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:00:53,005 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 84 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:53,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 445 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:00:53,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-07 01:00:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-12-07 01:00:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2021-12-07 01:00:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2021-12-07 01:00:53,018 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 83 [2021-12-07 01:00:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:53,018 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2021-12-07 01:00:53,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-07 01:00:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2021-12-07 01:00:53,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 01:00:53,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:53,021 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 01:00:53,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 01:00:53,021 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:53,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1920648402, now seen corresponding path program 1 times [2021-12-07 01:00:53,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:53,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128753189] [2021-12-07 01:00:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:53,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:00:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:00:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:00:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:00:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:00:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:00:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-07 01:00:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:00:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:00:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-07 01:00:53,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:53,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128753189] [2021-12-07 01:00:53,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128753189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:00:53,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:00:53,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 01:00:53,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319848652] [2021-12-07 01:00:53,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:00:53,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:00:53,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:53,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:00:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:00:53,314 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:53,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:53,633 INFO L93 Difference]: Finished difference Result 214 states and 275 transitions. [2021-12-07 01:00:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:00:53,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-12-07 01:00:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:53,635 INFO L225 Difference]: With dead ends: 214 [2021-12-07 01:00:53,635 INFO L226 Difference]: Without dead ends: 132 [2021-12-07 01:00:53,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:00:53,637 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 126 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:53,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 302 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:00:53,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-07 01:00:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2021-12-07 01:00:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 79 states have internal predecessors, (91), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2021-12-07 01:00:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-12-07 01:00:53,652 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 87 [2021-12-07 01:00:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:53,652 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-12-07 01:00:53,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-12-07 01:00:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 01:00:53,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:53,655 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 01:00:53,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 01:00:53,655 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:53,655 INFO L85 PathProgramCache]: Analyzing trace with hash -2116153456, now seen corresponding path program 1 times [2021-12-07 01:00:53,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:53,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646049943] [2021-12-07 01:00:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:53,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:00:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:00:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:00:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:00:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:53,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:00:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:54,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:00:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:54,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-07 01:00:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:54,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:00:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:54,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:00:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-07 01:00:54,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:54,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646049943] [2021-12-07 01:00:54,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646049943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:54,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237847098] [2021-12-07 01:00:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:54,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:54,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:54,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:54,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:00:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:54,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 01:00:54,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:54,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:00:54,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:00:54,727 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-07 01:00:54,727 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 24 treesize of output 1 [2021-12-07 01:00:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-07 01:00:54,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:00:54,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237847098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:00:54,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:00:54,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2021-12-07 01:00:54,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216399373] [2021-12-07 01:00:54,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:00:54,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:00:54,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:54,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:00:54,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:00:54,774 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-07 01:00:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:54,816 INFO L93 Difference]: Finished difference Result 222 states and 275 transitions. [2021-12-07 01:00:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:00:54,817 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 87 [2021-12-07 01:00:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:54,819 INFO L225 Difference]: With dead ends: 222 [2021-12-07 01:00:54,819 INFO L226 Difference]: Without dead ends: 131 [2021-12-07 01:00:54,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:00:54,820 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 25 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:54,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 824 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 99 Unchecked, 0.0s Time] [2021-12-07 01:00:54,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-07 01:00:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-07 01:00:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 95 states have (on average 1.2) internal successors, (114), 97 states have internal predecessors, (114), 22 states have call successors, (22), 12 states have call predecessors, (22), 13 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2021-12-07 01:00:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2021-12-07 01:00:54,830 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 87 [2021-12-07 01:00:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:54,830 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2021-12-07 01:00:54,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-07 01:00:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2021-12-07 01:00:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 01:00:54,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:54,832 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 01:00:54,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:00:55,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:55,033 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash -729368046, now seen corresponding path program 1 times [2021-12-07 01:00:55,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:55,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58344404] [2021-12-07 01:00:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:55,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:00:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:00:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:00:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:00:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:00:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:00:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-07 01:00:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:00:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:00:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 01:00:55,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:55,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58344404] [2021-12-07 01:00:55,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58344404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:55,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309724068] [2021-12-07 01:00:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:55,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:55,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:55,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:55,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:00:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:00:55,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-07 01:00:55,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:00:55,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309724068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:00:55,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:00:55,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-07 01:00:55,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590786833] [2021-12-07 01:00:55,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:00:55,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:00:55,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:55,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:00:55,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:00:55,614 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:55,631 INFO L93 Difference]: Finished difference Result 231 states and 291 transitions. [2021-12-07 01:00:55,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:00:55,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-12-07 01:00:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:55,632 INFO L225 Difference]: With dead ends: 231 [2021-12-07 01:00:55,632 INFO L226 Difference]: Without dead ends: 140 [2021-12-07 01:00:55,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:00:55,633 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 20 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:55,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 349 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:00:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-07 01:00:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2021-12-07 01:00:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 22 states have call successors, (22), 12 states have call predecessors, (22), 12 states have return successors, (24), 21 states have call predecessors, (24), 21 states have call successors, (24) [2021-12-07 01:00:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2021-12-07 01:00:55,641 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 87 [2021-12-07 01:00:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:55,642 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2021-12-07 01:00:55,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2021-12-07 01:00:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:00:55,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:55,643 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:00:55,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-07 01:00:55,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:55,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:55,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:55,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2043691690, now seen corresponding path program 2 times [2021-12-07 01:00:55,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:55,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634259007] [2021-12-07 01:00:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:55,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:00:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:00:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:00:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:00:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:55,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:00:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:56,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-07 01:00:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:56,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-07 01:00:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:56,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:00:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:56,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:00:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-07 01:00:56,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:56,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634259007] [2021-12-07 01:00:56,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634259007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:56,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869858645] [2021-12-07 01:00:56,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:00:56,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:56,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:56,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:56,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:00:56,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 01:00:56,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:00:56,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 2334 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-07 01:00:56,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:56,389 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-07 01:00:56,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-07 01:00:56,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:00:56,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-07 01:00:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-07 01:00:56,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:00:56,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869858645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:00:56,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:00:56,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2021-12-07 01:00:56,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520025832] [2021-12-07 01:00:56,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:00:56,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:00:56,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:56,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:00:56,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:00:56,715 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:56,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:56,893 INFO L93 Difference]: Finished difference Result 226 states and 276 transitions. [2021-12-07 01:00:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:00:56,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-12-07 01:00:56,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:56,895 INFO L225 Difference]: With dead ends: 226 [2021-12-07 01:00:56,895 INFO L226 Difference]: Without dead ends: 160 [2021-12-07 01:00:56,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:00:56,896 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 64 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:56,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 505 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 101 Unchecked, 0.0s Time] [2021-12-07 01:00:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-07 01:00:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-12-07 01:00:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 125 states have internal predecessors, (148), 23 states have call successors, (23), 13 states have call predecessors, (23), 14 states have return successors, (26), 21 states have call predecessors, (26), 22 states have call successors, (26) [2021-12-07 01:00:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 197 transitions. [2021-12-07 01:00:56,904 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 197 transitions. Word has length 91 [2021-12-07 01:00:56,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:56,904 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 197 transitions. [2021-12-07 01:00:56,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:56,905 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 197 transitions. [2021-12-07 01:00:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:00:56,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:56,906 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 01:00:56,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:00:57,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-07 01:00:57,107 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:57,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:57,108 INFO L85 PathProgramCache]: Analyzing trace with hash 971411928, now seen corresponding path program 2 times [2021-12-07 01:00:57,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:57,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410194822] [2021-12-07 01:00:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:57,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:00:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:00:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:00:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:00:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:00:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-07 01:00:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-07 01:00:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:00:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:00:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-07 01:00:57,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410194822] [2021-12-07 01:00:57,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410194822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:00:57,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:00:57,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-07 01:00:57,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233996247] [2021-12-07 01:00:57,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:00:57,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:00:57,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:57,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:00:57,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:00:57,333 INFO L87 Difference]: Start difference. First operand 160 states and 197 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:57,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:57,664 INFO L93 Difference]: Finished difference Result 259 states and 316 transitions. [2021-12-07 01:00:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:00:57,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-12-07 01:00:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:57,667 INFO L225 Difference]: With dead ends: 259 [2021-12-07 01:00:57,667 INFO L226 Difference]: Without dead ends: 187 [2021-12-07 01:00:57,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:00:57,668 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 136 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:57,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 335 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:00:57,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-07 01:00:57,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 169. [2021-12-07 01:00:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 134 states have internal predecessors, (157), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2021-12-07 01:00:57,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 209 transitions. [2021-12-07 01:00:57,682 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 209 transitions. Word has length 91 [2021-12-07 01:00:57,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:57,682 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 209 transitions. [2021-12-07 01:00:57,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 209 transitions. [2021-12-07 01:00:57,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:00:57,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:57,684 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 01:00:57,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-07 01:00:57,685 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:57,685 INFO L85 PathProgramCache]: Analyzing trace with hash -875101412, now seen corresponding path program 1 times [2021-12-07 01:00:57,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:57,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076115757] [2021-12-07 01:00:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:57,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:00:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:00:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:00:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:00:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:00:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-07 01:00:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-07 01:00:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:00:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:00:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-07 01:00:57,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:57,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076115757] [2021-12-07 01:00:57,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076115757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:57,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612385769] [2021-12-07 01:00:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:57,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:57,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:57,930 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:57,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:00:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:58,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 2531 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:00:58,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-07 01:00:58,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:00:58,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612385769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:00:58,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:00:58,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-07 01:00:58,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181908640] [2021-12-07 01:00:58,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:00:58,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:00:58,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:58,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:00:58,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:00:58,310 INFO L87 Difference]: Start difference. First operand 169 states and 209 transitions. Second operand has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-07 01:00:58,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:58,380 INFO L93 Difference]: Finished difference Result 319 states and 396 transitions. [2021-12-07 01:00:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:00:58,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 91 [2021-12-07 01:00:58,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:58,382 INFO L225 Difference]: With dead ends: 319 [2021-12-07 01:00:58,382 INFO L226 Difference]: Without dead ends: 184 [2021-12-07 01:00:58,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:00:58,384 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 12 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:58,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 862 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:00:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-07 01:00:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2021-12-07 01:00:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 138 states have (on average 1.1956521739130435) internal successors, (165), 144 states have internal predecessors, (165), 23 states have call successors, (23), 13 states have call predecessors, (23), 17 states have return successors, (34), 21 states have call predecessors, (34), 22 states have call successors, (34) [2021-12-07 01:00:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 222 transitions. [2021-12-07 01:00:58,395 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 222 transitions. Word has length 91 [2021-12-07 01:00:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:58,396 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 222 transitions. [2021-12-07 01:00:58,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-07 01:00:58,396 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 222 transitions. [2021-12-07 01:00:58,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-07 01:00:58,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:58,398 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:00:58,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:00:58,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 01:00:58,598 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2037504897, now seen corresponding path program 1 times [2021-12-07 01:00:58,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:58,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145804351] [2021-12-07 01:00:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:58,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:58,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:00:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:58,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:00:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:58,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:00:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:58,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:00:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:58,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:00:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:58,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:00:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:58,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:00:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:58,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:00:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:58,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:00:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-07 01:00:58,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:58,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145804351] [2021-12-07 01:00:58,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145804351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:58,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272918451] [2021-12-07 01:00:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:58,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:58,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:58,750 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:58,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:00:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:59,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 2536 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:00:59,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:00:59,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:00:59,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272918451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:00:59,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:00:59,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-07 01:00:59,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73320660] [2021-12-07 01:00:59,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:00:59,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:00:59,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:59,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:00:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:00:59,081 INFO L87 Difference]: Start difference. First operand 179 states and 222 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:59,096 INFO L93 Difference]: Finished difference Result 332 states and 418 transitions. [2021-12-07 01:00:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:00:59,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-12-07 01:00:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:59,098 INFO L225 Difference]: With dead ends: 332 [2021-12-07 01:00:59,098 INFO L226 Difference]: Without dead ends: 180 [2021-12-07 01:00:59,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:00:59,099 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 9 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:59,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 342 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:00:59,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-07 01:00:59,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 171. [2021-12-07 01:00:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 131 states have (on average 1.1603053435114503) internal successors, (152), 136 states have internal predecessors, (152), 23 states have call successors, (23), 13 states have call predecessors, (23), 16 states have return successors, (31), 21 states have call predecessors, (31), 22 states have call successors, (31) [2021-12-07 01:00:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 206 transitions. [2021-12-07 01:00:59,107 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 206 transitions. Word has length 93 [2021-12-07 01:00:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:59,107 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 206 transitions. [2021-12-07 01:00:59,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:59,108 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 206 transitions. [2021-12-07 01:00:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-07 01:00:59,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:59,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 01:00:59,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:00:59,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 01:00:59,309 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:59,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:59,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1186379205, now seen corresponding path program 1 times [2021-12-07 01:00:59,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:59,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686039322] [2021-12-07 01:00:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:59,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:59,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:00:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:59,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:00:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:59,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:00:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:59,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:00:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:59,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:00:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:59,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:00:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:59,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:00:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:59,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:00:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:59,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:00:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-07 01:00:59,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686039322] [2021-12-07 01:00:59,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686039322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292113797] [2021-12-07 01:00:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:59,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:59,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:59,428 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:59,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:00:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:59,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2538 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:00:59,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-07 01:00:59,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:00:59,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292113797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:00:59,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:00:59,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-07 01:00:59,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166269379] [2021-12-07 01:00:59,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:00:59,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:00:59,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:59,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:00:59,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:00:59,746 INFO L87 Difference]: Start difference. First operand 171 states and 206 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:59,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:59,761 INFO L93 Difference]: Finished difference Result 309 states and 385 transitions. [2021-12-07 01:00:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:00:59,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-12-07 01:00:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:59,762 INFO L225 Difference]: With dead ends: 309 [2021-12-07 01:00:59,762 INFO L226 Difference]: Without dead ends: 168 [2021-12-07 01:00:59,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:00:59,763 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 34 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:59,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 340 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:00:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-07 01:00:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2021-12-07 01:00:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 126 states have internal predecessors, (137), 23 states have call successors, (23), 13 states have call predecessors, (23), 16 states have return successors, (31), 21 states have call predecessors, (31), 22 states have call successors, (31) [2021-12-07 01:00:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2021-12-07 01:00:59,771 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 93 [2021-12-07 01:00:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:59,771 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2021-12-07 01:00:59,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:00:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2021-12-07 01:00:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-07 01:00:59,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:59,772 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 01:00:59,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:00:59,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 01:00:59,974 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:59,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:59,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1147013433, now seen corresponding path program 2 times [2021-12-07 01:00:59,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:59,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834520745] [2021-12-07 01:00:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:59,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:01:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:01:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:01:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:01:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:01:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:01:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:01:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:01:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-07 01:01:00,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:00,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834520745] [2021-12-07 01:01:00,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834520745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:01:00,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:01:00,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 01:01:00,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612059717] [2021-12-07 01:01:00,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:01:00,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:01:00,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:01:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:01:00,181 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:01:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:00,423 INFO L93 Difference]: Finished difference Result 247 states and 288 transitions. [2021-12-07 01:01:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:01:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-12-07 01:01:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:00,426 INFO L225 Difference]: With dead ends: 247 [2021-12-07 01:01:00,426 INFO L226 Difference]: Without dead ends: 169 [2021-12-07 01:01:00,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:01:00,427 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 106 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:00,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 286 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:01:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-07 01:01:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 161. [2021-12-07 01:01:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 121 states have (on average 1.1239669421487604) internal successors, (136), 126 states have internal predecessors, (136), 23 states have call successors, (23), 13 states have call predecessors, (23), 16 states have return successors, (31), 21 states have call predecessors, (31), 22 states have call successors, (31) [2021-12-07 01:01:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 190 transitions. [2021-12-07 01:01:00,438 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 190 transitions. Word has length 93 [2021-12-07 01:01:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:00,438 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 190 transitions. [2021-12-07 01:01:00,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:01:00,438 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 190 transitions. [2021-12-07 01:01:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-07 01:01:00,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:00,439 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:00,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-07 01:01:00,440 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:00,440 INFO L85 PathProgramCache]: Analyzing trace with hash -888847995, now seen corresponding path program 2 times [2021-12-07 01:01:00,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:00,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265690824] [2021-12-07 01:01:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:00,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:01:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:01:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:01:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:01:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:01:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:01:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:01:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:01:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-07 01:01:00,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:00,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265690824] [2021-12-07 01:01:00,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265690824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:01:00,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:01:00,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:01:00,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333172281] [2021-12-07 01:01:00,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:01:00,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:01:00,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:00,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:01:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:01:00,619 INFO L87 Difference]: Start difference. First operand 161 states and 190 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-07 01:01:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:00,867 INFO L93 Difference]: Finished difference Result 292 states and 346 transitions. [2021-12-07 01:01:00,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:01:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 93 [2021-12-07 01:01:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:00,869 INFO L225 Difference]: With dead ends: 292 [2021-12-07 01:01:00,869 INFO L226 Difference]: Without dead ends: 164 [2021-12-07 01:01:00,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:01:00,870 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 80 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:00,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 271 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:01:00,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-07 01:01:00,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 159. [2021-12-07 01:01:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 119 states have (on average 1.1092436974789917) internal successors, (132), 124 states have internal predecessors, (132), 23 states have call successors, (23), 13 states have call predecessors, (23), 16 states have return successors, (31), 21 states have call predecessors, (31), 22 states have call successors, (31) [2021-12-07 01:01:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 186 transitions. [2021-12-07 01:01:00,877 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 186 transitions. Word has length 93 [2021-12-07 01:01:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:00,877 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 186 transitions. [2021-12-07 01:01:00,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-07 01:01:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 186 transitions. [2021-12-07 01:01:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-07 01:01:00,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:00,878 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:00,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 01:01:00,878 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:00,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:00,879 INFO L85 PathProgramCache]: Analyzing trace with hash 734209388, now seen corresponding path program 1 times [2021-12-07 01:01:00,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:00,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187840223] [2021-12-07 01:01:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:00,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:01:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:01:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:01:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:01:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:01:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:00,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:01:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:01:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:01:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-07 01:01:01,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:01,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187840223] [2021-12-07 01:01:01,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187840223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:01:01,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:01:01,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-07 01:01:01,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575570568] [2021-12-07 01:01:01,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:01:01,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 01:01:01,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 01:01:01,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:01:01,048 INFO L87 Difference]: Start difference. First operand 159 states and 186 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-07 01:01:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:01,374 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2021-12-07 01:01:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:01:01,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 95 [2021-12-07 01:01:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:01,375 INFO L225 Difference]: With dead ends: 179 [2021-12-07 01:01:01,375 INFO L226 Difference]: Without dead ends: 177 [2021-12-07 01:01:01,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:01:01,376 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 87 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:01,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 555 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:01:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-07 01:01:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 167. [2021-12-07 01:01:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 126 states have (on average 1.1031746031746033) internal successors, (139), 132 states have internal predecessors, (139), 23 states have call successors, (23), 13 states have call predecessors, (23), 17 states have return successors, (35), 21 states have call predecessors, (35), 22 states have call successors, (35) [2021-12-07 01:01:01,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 197 transitions. [2021-12-07 01:01:01,383 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 197 transitions. Word has length 95 [2021-12-07 01:01:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:01,383 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 197 transitions. [2021-12-07 01:01:01,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-07 01:01:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 197 transitions. [2021-12-07 01:01:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-07 01:01:01,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:01,384 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 01:01:01,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-07 01:01:01,384 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:01,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1435273966, now seen corresponding path program 1 times [2021-12-07 01:01:01,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:01,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875589662] [2021-12-07 01:01:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:01,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:01:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:01:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:01:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:01:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:01:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:01:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:01:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:01:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-07 01:01:01,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:01,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875589662] [2021-12-07 01:01:01,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875589662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:01:01,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:01:01,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 01:01:01,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866005058] [2021-12-07 01:01:01,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:01:01,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:01:01,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:01,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:01:01,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:01:01,562 INFO L87 Difference]: Start difference. First operand 167 states and 197 transitions. Second operand has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:01:01,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:01,804 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2021-12-07 01:01:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:01:01,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 95 [2021-12-07 01:01:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:01,805 INFO L225 Difference]: With dead ends: 248 [2021-12-07 01:01:01,805 INFO L226 Difference]: Without dead ends: 163 [2021-12-07 01:01:01,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:01:01,806 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 84 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:01,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 333 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:01:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-07 01:01:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2021-12-07 01:01:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 121 states have (on average 1.0991735537190082) internal successors, (133), 126 states have internal predecessors, (133), 23 states have call successors, (23), 13 states have call predecessors, (23), 16 states have return successors, (33), 21 states have call predecessors, (33), 22 states have call successors, (33) [2021-12-07 01:01:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 189 transitions. [2021-12-07 01:01:01,814 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 189 transitions. Word has length 95 [2021-12-07 01:01:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:01,815 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 189 transitions. [2021-12-07 01:01:01,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 01:01:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 189 transitions. [2021-12-07 01:01:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-07 01:01:01,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:01,816 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-07 01:01:01,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-07 01:01:01,816 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:01,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:01,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1313835716, now seen corresponding path program 1 times [2021-12-07 01:01:01,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:01,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549169489] [2021-12-07 01:01:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:01,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:01:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:01:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:01:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:01:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:01:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-07 01:01:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:01:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-07 01:01:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:01:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-07 01:01:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-07 01:01:01,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:01,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549169489] [2021-12-07 01:01:01,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549169489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:01:01,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:01:01,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-07 01:01:01,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407568208] [2021-12-07 01:01:01,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:01:01,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:01:01,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:01:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:01:01,992 INFO L87 Difference]: Start difference. First operand 161 states and 189 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-07 01:01:02,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:02,286 INFO L93 Difference]: Finished difference Result 183 states and 212 transitions. [2021-12-07 01:01:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:01:02,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2021-12-07 01:01:02,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:02,288 INFO L225 Difference]: With dead ends: 183 [2021-12-07 01:01:02,288 INFO L226 Difference]: Without dead ends: 181 [2021-12-07 01:01:02,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:01:02,289 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 139 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:02,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 438 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:01:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-07 01:01:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 166. [2021-12-07 01:01:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 124 states have (on average 1.096774193548387) internal successors, (136), 129 states have internal predecessors, (136), 24 states have call successors, (24), 14 states have call predecessors, (24), 17 states have return successors, (34), 22 states have call predecessors, (34), 23 states have call successors, (34) [2021-12-07 01:01:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 194 transitions. [2021-12-07 01:01:02,299 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 194 transitions. Word has length 109 [2021-12-07 01:01:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:02,300 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 194 transitions. [2021-12-07 01:01:02,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-07 01:01:02,300 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 194 transitions. [2021-12-07 01:01:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-07 01:01:02,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:02,301 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:02,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-07 01:01:02,302 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:02,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash 920679761, now seen corresponding path program 1 times [2021-12-07 01:01:02,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:02,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839436291] [2021-12-07 01:01:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:02,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:01:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:01:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:01:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:01:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:01:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:01:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:01:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-07 01:01:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:01:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-07 01:01:02,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:02,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839436291] [2021-12-07 01:01:02,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839436291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:02,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053523254] [2021-12-07 01:01:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:02,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:02,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:02,692 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:02,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:01:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:02,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 2629 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-07 01:01:02,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:02,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:01:02,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:01:03,224 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 19 treesize of output 7 [2021-12-07 01:01:03,226 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 19 treesize of output 7 [2021-12-07 01:01:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-07 01:01:03,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:01:03,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053523254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:01:03,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:01:03,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2021-12-07 01:01:03,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158304964] [2021-12-07 01:01:03,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:01:03,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:01:03,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:03,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:01:03,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:01:03,270 INFO L87 Difference]: Start difference. First operand 166 states and 194 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-07 01:01:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:03,471 INFO L93 Difference]: Finished difference Result 284 states and 327 transitions. [2021-12-07 01:01:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:01:03,471 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 111 [2021-12-07 01:01:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:03,472 INFO L225 Difference]: With dead ends: 284 [2021-12-07 01:01:03,473 INFO L226 Difference]: Without dead ends: 177 [2021-12-07 01:01:03,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:01:03,474 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 52 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:03,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 682 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2021-12-07 01:01:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-07 01:01:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 173. [2021-12-07 01:01:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 129 states have (on average 1.0930232558139534) internal successors, (141), 133 states have internal predecessors, (141), 25 states have call successors, (25), 15 states have call predecessors, (25), 18 states have return successors, (35), 24 states have call predecessors, (35), 24 states have call successors, (35) [2021-12-07 01:01:03,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 201 transitions. [2021-12-07 01:01:03,480 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 201 transitions. Word has length 111 [2021-12-07 01:01:03,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:03,481 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 201 transitions. [2021-12-07 01:01:03,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-07 01:01:03,481 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 201 transitions. [2021-12-07 01:01:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-07 01:01:03,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:03,482 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:03,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 01:01:03,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 01:01:03,682 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:03,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:03,683 INFO L85 PathProgramCache]: Analyzing trace with hash 701527042, now seen corresponding path program 1 times [2021-12-07 01:01:03,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:03,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802655676] [2021-12-07 01:01:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:03,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:03,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:01:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:03,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:01:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:03,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:01:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:03,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:03,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:01:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:03,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:01:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:03,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-07 01:01:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:04,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:01:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:04,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-07 01:01:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:04,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:01:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:04,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-07 01:01:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-07 01:01:04,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:04,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802655676] [2021-12-07 01:01:04,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802655676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:04,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42943414] [2021-12-07 01:01:04,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:04,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:04,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:04,143 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:04,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 01:01:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:04,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 2582 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-07 01:01:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:04,438 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 11 treesize of output 7 [2021-12-07 01:01:04,557 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 8 treesize of output 4 [2021-12-07 01:01:04,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:01:04,661 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-07 01:01:04,662 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 16 treesize of output 1 [2021-12-07 01:01:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 47 proven. 26 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-07 01:01:04,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:01:04,833 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 40 treesize of output 34 [2021-12-07 01:01:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-07 01:01:04,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42943414] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:04,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:01:04,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17, 12] total 28 [2021-12-07 01:01:04,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014542988] [2021-12-07 01:01:04,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:01:04,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:01:04,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:04,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:01:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:01:04,895 INFO L87 Difference]: Start difference. First operand 173 states and 201 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-07 01:01:05,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:05,156 INFO L93 Difference]: Finished difference Result 261 states and 298 transitions. [2021-12-07 01:01:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:01:05,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 113 [2021-12-07 01:01:05,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:05,157 INFO L225 Difference]: With dead ends: 261 [2021-12-07 01:01:05,157 INFO L226 Difference]: Without dead ends: 147 [2021-12-07 01:01:05,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 230 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:01:05,158 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 70 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:05,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 351 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:01:05,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-07 01:01:05,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-12-07 01:01:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 107 states have internal predecessors, (113), 23 states have call successors, (23), 13 states have call predecessors, (23), 16 states have return successors, (32), 22 states have call predecessors, (32), 22 states have call successors, (32) [2021-12-07 01:01:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2021-12-07 01:01:05,164 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 113 [2021-12-07 01:01:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:05,165 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2021-12-07 01:01:05,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-07 01:01:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2021-12-07 01:01:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-07 01:01:05,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:05,166 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-07 01:01:05,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 01:01:05,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:05,366 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:05,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:05,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1216300311, now seen corresponding path program 1 times [2021-12-07 01:01:05,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:05,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455762877] [2021-12-07 01:01:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:05,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:01:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:01:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:01:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:01:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:01:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:01:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-07 01:01:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 01:01:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 01:01:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-07 01:01:05,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:05,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455762877] [2021-12-07 01:01:05,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455762877] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:05,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684310941] [2021-12-07 01:01:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:05,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:05,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:05,551 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:05,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 01:01:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:05,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:01:05,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:01:05,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:01:05,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684310941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:01:05,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:01:05,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-12-07 01:01:05,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202093517] [2021-12-07 01:01:05,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:01:05,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:01:05,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:05,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:01:05,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:01:05,895 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 01:01:05,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:05,951 INFO L93 Difference]: Finished difference Result 253 states and 293 transitions. [2021-12-07 01:01:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:01:05,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 115 [2021-12-07 01:01:05,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:05,953 INFO L225 Difference]: With dead ends: 253 [2021-12-07 01:01:05,953 INFO L226 Difference]: Without dead ends: 143 [2021-12-07 01:01:05,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:01:05,954 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 12 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:05,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 847 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:01:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-07 01:01:05,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-12-07 01:01:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 107 states have internal predecessors, (113), 23 states have call successors, (23), 13 states have call predecessors, (23), 16 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2021-12-07 01:01:05,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 166 transitions. [2021-12-07 01:01:05,959 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 166 transitions. Word has length 115 [2021-12-07 01:01:05,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:05,960 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 166 transitions. [2021-12-07 01:01:05,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 01:01:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 166 transitions. [2021-12-07 01:01:05,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-07 01:01:05,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:05,961 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:05,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 01:01:06,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:06,162 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1524122562, now seen corresponding path program 2 times [2021-12-07 01:01:06,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:06,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165319889] [2021-12-07 01:01:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:06,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:01:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:01:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:01:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:01:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:01:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:01:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:01:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:01:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:01:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-07 01:01:06,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:06,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165319889] [2021-12-07 01:01:06,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165319889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:06,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952342090] [2021-12-07 01:01:06,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:01:06,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:06,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:06,996 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:06,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 01:01:08,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:01:08,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:01:08,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 01:01:08,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:08,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:01:08,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:01:08,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:01:08,537 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 27 treesize of output 18 [2021-12-07 01:01:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 47 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 01:01:08,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:01:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-07 01:01:09,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952342090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:01:09,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:01:09,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 13] total 30 [2021-12-07 01:01:09,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491460059] [2021-12-07 01:01:09,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:01:09,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 01:01:09,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:09,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 01:01:09,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-12-07 01:01:09,073 INFO L87 Difference]: Start difference. First operand 143 states and 166 transitions. Second operand has 30 states, 26 states have (on average 5.5) internal successors, (143), 26 states have internal predecessors, (143), 14 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (29), 11 states have call predecessors, (29), 14 states have call successors, (29) [2021-12-07 01:01:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:10,658 INFO L93 Difference]: Finished difference Result 304 states and 350 transitions. [2021-12-07 01:01:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-07 01:01:10,658 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 5.5) internal successors, (143), 26 states have internal predecessors, (143), 14 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (29), 11 states have call predecessors, (29), 14 states have call successors, (29) Word has length 117 [2021-12-07 01:01:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:10,659 INFO L225 Difference]: With dead ends: 304 [2021-12-07 01:01:10,659 INFO L226 Difference]: Without dead ends: 200 [2021-12-07 01:01:10,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 233 SyntacticMatches, 14 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=302, Invalid=2350, Unknown=0, NotChecked=0, Total=2652 [2021-12-07 01:01:10,661 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 334 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:10,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 793 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1656 Invalid, 0 Unknown, 292 Unchecked, 0.9s Time] [2021-12-07 01:01:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-07 01:01:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 164. [2021-12-07 01:01:10,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 126 states have internal predecessors, (133), 23 states have call successors, (23), 15 states have call predecessors, (23), 18 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2021-12-07 01:01:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2021-12-07 01:01:10,671 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 117 [2021-12-07 01:01:10,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:10,671 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2021-12-07 01:01:10,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 5.5) internal successors, (143), 26 states have internal predecessors, (143), 14 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (29), 11 states have call predecessors, (29), 14 states have call successors, (29) [2021-12-07 01:01:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2021-12-07 01:01:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-07 01:01:10,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:10,673 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:10,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 01:01:10,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:10,874 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:10,875 INFO L85 PathProgramCache]: Analyzing trace with hash -140184041, now seen corresponding path program 1 times [2021-12-07 01:01:10,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:10,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946122850] [2021-12-07 01:01:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:10,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:10,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:01:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:10,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:01:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:01:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:01:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:01:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:01:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:01:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:01:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-07 01:01:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-07 01:01:11,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:11,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946122850] [2021-12-07 01:01:11,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946122850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:01:11,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:01:11,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:01:11,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550809068] [2021-12-07 01:01:11,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:01:11,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:01:11,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:11,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:01:11,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:01:11,076 INFO L87 Difference]: Start difference. First operand 164 states and 186 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-07 01:01:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:11,245 INFO L93 Difference]: Finished difference Result 265 states and 299 transitions. [2021-12-07 01:01:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:01:11,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2021-12-07 01:01:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:11,247 INFO L225 Difference]: With dead ends: 265 [2021-12-07 01:01:11,247 INFO L226 Difference]: Without dead ends: 166 [2021-12-07 01:01:11,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:01:11,248 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 99 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:11,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 180 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:01:11,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-07 01:01:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-12-07 01:01:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.089430894308943) internal successors, (134), 127 states have internal predecessors, (134), 23 states have call successors, (23), 15 states have call predecessors, (23), 18 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2021-12-07 01:01:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 187 transitions. [2021-12-07 01:01:11,255 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 187 transitions. Word has length 118 [2021-12-07 01:01:11,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:11,255 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 187 transitions. [2021-12-07 01:01:11,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-07 01:01:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 187 transitions. [2021-12-07 01:01:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-07 01:01:11,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:11,256 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:11,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-07 01:01:11,256 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:11,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:11,257 INFO L85 PathProgramCache]: Analyzing trace with hash 693312025, now seen corresponding path program 1 times [2021-12-07 01:01:11,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:11,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467601686] [2021-12-07 01:01:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:11,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:01:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:01:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:01:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:01:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:01:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:01:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:01:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:11,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:01:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:12,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:12,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:12,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-07 01:01:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-07 01:01:12,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:12,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467601686] [2021-12-07 01:01:12,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467601686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:12,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853481684] [2021-12-07 01:01:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:12,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:12,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:12,399 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:12,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 01:01:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:12,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-07 01:01:12,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:12,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:01:14,856 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_36| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_36|) 8) 1) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_36|)) is different from true [2021-12-07 01:01:16,943 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_37| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_37|) 8) 1) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_37|)) is different from true [2021-12-07 01:01:19,058 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_12| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_12|) 8) 1) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_12|)) is different from true [2021-12-07 01:01:40,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:01:40,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-12-07 01:01:44,982 WARN L860 $PredicateComparison]: unable to prove that (exists ((memset_impl_~sp~0.base Int)) (and (<= memset_impl_~sp~0.base |c_memset_impl_#in~s.base|) (exists ((v_ArrVal_1116 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_1116))))) is different from true [2021-12-07 01:01:45,012 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1116 (Array Int Int)) (memset_impl_~sp~0.base Int)) (and (<= memset_impl_~sp~0.base |c_my_memset_#in~s.base|) (= |c_#memory_int| (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_1116)))) is different from true [2021-12-07 01:01:45,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:01:45,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-07 01:01:45,055 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 31 treesize of output 26 [2021-12-07 01:01:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 16 refuted. 6 times theorem prover too weak. 12 trivial. 38 not checked. [2021-12-07 01:01:51,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:01:54,631 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_memset_impl_~sp~0.base_8 Int) (v_ArrVal_1124 (Array Int Int))) (or (not (= (mod (select (select (store |c_#memory_int| v_memset_impl_~sp~0.base_8 v_ArrVal_1124) |c_aws_byte_buf_secure_zero_~buf#1.base|) (+ 16 |c_aws_byte_buf_secure_zero_~buf#1.offset|)) 18446744073709551616) 0)) (< |c_aws_byte_buf_secure_zero_aws_secure_zero_~pBuf#1.base| v_memset_impl_~sp~0.base_8))) is different from false [2021-12-07 01:01:54,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853481684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:54,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:01:54,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 54 [2021-12-07 01:01:54,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083362754] [2021-12-07 01:01:54,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:01:54,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-07 01:01:54,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:54,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-07 01:01:54,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2594, Unknown=18, NotChecked=642, Total=3422 [2021-12-07 01:01:54,635 INFO L87 Difference]: Start difference. First operand 165 states and 187 transitions. Second operand has 54 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 44 states have internal predecessors, (145), 19 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (24), 18 states have call predecessors, (24), 18 states have call successors, (24) [2021-12-07 01:03:42,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:03:42,499 INFO L93 Difference]: Finished difference Result 337 states and 384 transitions. [2021-12-07 01:03:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-07 01:03:42,500 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 44 states have internal predecessors, (145), 19 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (24), 18 states have call predecessors, (24), 18 states have call successors, (24) Word has length 120 [2021-12-07 01:03:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:03:42,501 INFO L225 Difference]: With dead ends: 337 [2021-12-07 01:03:42,501 INFO L226 Difference]: Without dead ends: 235 [2021-12-07 01:03:42,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 148.4s TimeCoverageRelationStatistics Valid=477, Invalid=7141, Unknown=62, NotChecked=1062, Total=8742 [2021-12-07 01:03:42,504 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 203 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 2656 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 5039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2240 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:03:42,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1266 Invalid, 5039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2656 Invalid, 0 Unknown, 2240 Unchecked, 1.3s Time] [2021-12-07 01:03:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-07 01:03:42,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 199. [2021-12-07 01:03:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 151 states have (on average 1.086092715231788) internal successors, (164), 156 states have internal predecessors, (164), 25 states have call successors, (25), 17 states have call predecessors, (25), 22 states have return successors, (34), 25 states have call predecessors, (34), 24 states have call successors, (34) [2021-12-07 01:03:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 223 transitions. [2021-12-07 01:03:42,513 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 223 transitions. Word has length 120 [2021-12-07 01:03:42,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:03:42,513 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 223 transitions. [2021-12-07 01:03:42,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 44 states have internal predecessors, (145), 19 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (24), 18 states have call predecessors, (24), 18 states have call successors, (24) [2021-12-07 01:03:42,514 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 223 transitions. [2021-12-07 01:03:42,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-07 01:03:42,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:03:42,515 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:03:42,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 01:03:42,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 01:03:42,717 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:03:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:03:42,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1475852901, now seen corresponding path program 2 times [2021-12-07 01:03:42,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:03:42,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795207685] [2021-12-07 01:03:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:03:42,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:03:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:43,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:03:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:43,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:03:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:43,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:03:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:43,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:03:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:43,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:03:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:43,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:03:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:43,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:03:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:43,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:03:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:43,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:03:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:43,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:03:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:44,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:03:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:44,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-07 01:03:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-07 01:03:44,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:03:44,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795207685] [2021-12-07 01:03:44,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795207685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:03:44,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732237718] [2021-12-07 01:03:44,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:03:44,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:03:44,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:03:44,295 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:03:44,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 01:03:45,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:03:45,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:03:45,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-07 01:03:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:03:45,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:03:45,766 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:03:45,767 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 [2021-12-07 01:03:45,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:03:47,841 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_42| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_42| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_42|) 8)))) is different from true [2021-12-07 01:03:49,920 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_43| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_43| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_43|) 8)))) is different from true [2021-12-07 01:03:52,049 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_17| Int)) (not (= |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_17| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_17|) 8)))) is different from true [2021-12-07 01:04:00,480 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_18| Int)) (and (not (= (mod (select (select |c_#memory_int| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_18|) 16) 18446744073709551616) 0)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_18|) 8) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_18|)))) is different from true [2021-12-07 01:04:00,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:04:00,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-12-07 01:04:00,857 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1251 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_memset_impl_#in~s.base| v_ArrVal_1251))) is different from true [2021-12-07 01:04:00,866 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1251 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_my_memset_#in~s.base| v_ArrVal_1251))) is different from true [2021-12-07 01:04:00,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-07 01:04:00,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:04:00,936 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 24 treesize of output 23 [2021-12-07 01:04:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 22 refuted. 9 times theorem prover too weak. 4 trivial. 48 not checked. [2021-12-07 01:04:13,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:04:13,788 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1260 (Array Int Int))) (< 0 (mod (select (select (store |c_#memory_int| |c_aws_byte_buf_secure_zero_aws_secure_zero_~pBuf#1.base| v_ArrVal_1260) |c_aws_byte_buf_secure_zero_~buf#1.base|) (+ 16 |c_aws_byte_buf_secure_zero_~buf#1.offset|)) 18446744073709551616))) is different from false [2021-12-07 01:04:13,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732237718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:04:13,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:04:13,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 58 [2021-12-07 01:04:13,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511516903] [2021-12-07 01:04:13,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:04:13,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-07 01:04:13,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-07 01:04:13,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2905, Unknown=14, NotChecked=798, Total=3906 [2021-12-07 01:04:13,791 INFO L87 Difference]: Start difference. First operand 199 states and 223 transitions. Second operand has 58 states, 53 states have (on average 2.9245283018867925) internal successors, (155), 48 states have internal predecessors, (155), 18 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (23), 18 states have call predecessors, (23), 17 states have call successors, (23) [2021-12-07 01:05:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:54,131 INFO L93 Difference]: Finished difference Result 356 states and 396 transitions. [2021-12-07 01:05:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-07 01:05:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 53 states have (on average 2.9245283018867925) internal successors, (155), 48 states have internal predecessors, (155), 18 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (23), 18 states have call predecessors, (23), 17 states have call successors, (23) Word has length 122 [2021-12-07 01:05:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:54,133 INFO L225 Difference]: With dead ends: 356 [2021-12-07 01:05:54,133 INFO L226 Difference]: Without dead ends: 241 [2021-12-07 01:05:54,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 135 SyntacticMatches, 10 SemanticMatches, 99 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 127.3s TimeCoverageRelationStatistics Valid=504, Invalid=8180, Unknown=86, NotChecked=1330, Total=10100 [2021-12-07 01:05:54,141 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 198 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 5034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2476 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:54,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 962 Invalid, 5034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2458 Invalid, 0 Unknown, 2476 Unchecked, 1.4s Time] [2021-12-07 01:05:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-07 01:05:54,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 204. [2021-12-07 01:05:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 156 states have (on average 1.0897435897435896) internal successors, (170), 161 states have internal predecessors, (170), 24 states have call successors, (24), 18 states have call predecessors, (24), 23 states have return successors, (33), 24 states have call predecessors, (33), 23 states have call successors, (33) [2021-12-07 01:05:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 227 transitions. [2021-12-07 01:05:54,151 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 227 transitions. Word has length 122 [2021-12-07 01:05:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:54,152 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 227 transitions. [2021-12-07 01:05:54,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 53 states have (on average 2.9245283018867925) internal successors, (155), 48 states have internal predecessors, (155), 18 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (23), 18 states have call predecessors, (23), 17 states have call successors, (23) [2021-12-07 01:05:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 227 transitions. [2021-12-07 01:05:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-07 01:05:54,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:54,153 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:05:54,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 01:05:54,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-07 01:05:54,354 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:05:54,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:54,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1310759069, now seen corresponding path program 3 times [2021-12-07 01:05:54,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:54,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434262457] [2021-12-07 01:05:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:54,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:54,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:05:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:54,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:05:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:54,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:05:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:54,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:05:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:54,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:05:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:55,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:05:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:55,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:05:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:55,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:05:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:55,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:05:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:55,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:05:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:55,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:05:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:55,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-07 01:05:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 39 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-07 01:05:55,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:55,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434262457] [2021-12-07 01:05:55,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434262457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:05:55,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076008486] [2021-12-07 01:05:55,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:05:55,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:05:55,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:05:55,878 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:05:55,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 01:05:57,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 01:05:57,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:05:57,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 2702 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-07 01:05:57,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:05:57,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:05:57,610 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:05:57,610 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 [2021-12-07 01:05:57,617 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 11 treesize of output 7 [2021-12-07 01:05:59,627 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_48| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_48| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_48|) ~aws_common_error~0~AWS_ERROR_INVALID_BASE64_STR)))) is different from true [2021-12-07 01:06:01,662 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_49| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_49|) ~aws_common_error~0~AWS_ERROR_INVALID_BASE64_STR) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_49|))) is different from true [2021-12-07 01:06:03,744 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_22| Int)) (not (= |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_22| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_22|) ~aws_common_error~0~AWS_ERROR_INVALID_BASE64_STR)))) is different from true [2021-12-07 01:06:14,222 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_23| Int)) (and (not (= |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_23| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_23|) ~aws_common_error~0~AWS_ERROR_INVALID_BASE64_STR))) (not (= (mod (select (select |c_#memory_int| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_23|) 16) 18446744073709551616) 0)))) is different from true [2021-12-07 01:06:14,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:06:14,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-12-07 01:06:14,599 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1420 (Array Int Int))) (= (store |c_old(#memory_int)| |c_memset_impl_#in~s.base| v_ArrVal_1420) |c_#memory_int|)) is different from true [2021-12-07 01:06:14,610 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1420 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_my_memset_#in~s.base| v_ArrVal_1420))) is different from true [2021-12-07 01:06:14,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-07 01:06:14,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:06:14,672 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 24 treesize of output 23 [2021-12-07 01:06:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 23 refuted. 9 times theorem prover too weak. 6 trivial. 50 not checked. [2021-12-07 01:06:29,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:06:29,490 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1430 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_aws_byte_buf_secure_zero_aws_secure_zero_~pBuf#1.base| v_ArrVal_1430) |c_aws_byte_buf_secure_zero_~buf#1.base|) (+ 16 |c_aws_byte_buf_secure_zero_~buf#1.offset|)) 18446744073709551616) 0))) is different from false [2021-12-07 01:06:29,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076008486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:06:29,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:06:29,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 56 [2021-12-07 01:06:29,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703554891] [2021-12-07 01:06:29,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:06:29,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-07 01:06:29,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:06:29,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-07 01:06:29,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2694, Unknown=15, NotChecked=770, Total=3660 [2021-12-07 01:06:29,494 INFO L87 Difference]: Start difference. First operand 204 states and 227 transitions. Second operand has 56 states, 52 states have (on average 3.1538461538461537) internal successors, (164), 48 states have internal predecessors, (164), 16 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2021-12-07 01:08:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:32,634 INFO L93 Difference]: Finished difference Result 381 states and 439 transitions. [2021-12-07 01:08:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-07 01:08:32,634 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 3.1538461538461537) internal successors, (164), 48 states have internal predecessors, (164), 16 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) Word has length 124 [2021-12-07 01:08:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:32,637 INFO L225 Difference]: With dead ends: 381 [2021-12-07 01:08:32,637 INFO L226 Difference]: Without dead ends: 280 [2021-12-07 01:08:32,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 140 SyntacticMatches, 14 SemanticMatches, 107 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 2391 ImplicationChecksByTransitivity, 153.9s TimeCoverageRelationStatistics Valid=628, Invalid=9609, Unknown=93, NotChecked=1442, Total=11772 [2021-12-07 01:08:32,641 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 198 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 5452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2900 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:32,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 1324 Invalid, 5452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2455 Invalid, 0 Unknown, 2900 Unchecked, 1.3s Time] [2021-12-07 01:08:32,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-07 01:08:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 254. [2021-12-07 01:08:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 192 states have (on average 1.0885416666666667) internal successors, (209), 198 states have internal predecessors, (209), 33 states have call successors, (33), 21 states have call predecessors, (33), 28 states have return successors, (50), 34 states have call predecessors, (50), 32 states have call successors, (50) [2021-12-07 01:08:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 292 transitions. [2021-12-07 01:08:32,655 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 292 transitions. Word has length 124 [2021-12-07 01:08:32,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:32,655 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 292 transitions. [2021-12-07 01:08:32,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 3.1538461538461537) internal successors, (164), 48 states have internal predecessors, (164), 16 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2021-12-07 01:08:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 292 transitions. [2021-12-07 01:08:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-07 01:08:32,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:32,657 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:32,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 01:08:32,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-07 01:08:32,857 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:08:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:32,858 INFO L85 PathProgramCache]: Analyzing trace with hash -647815717, now seen corresponding path program 1 times [2021-12-07 01:08:32,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:32,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497319912] [2021-12-07 01:08:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:32,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:32,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:08:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:32,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:08:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:08:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:08:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:08:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:08:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:08:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:08:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:08:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:08:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:08:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-07 01:08:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-07 01:08:33,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:33,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497319912] [2021-12-07 01:08:33,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497319912] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:08:33,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955076818] [2021-12-07 01:08:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:33,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:33,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:33,201 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:33,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 01:08:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 2707 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 01:08:33,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:33,992 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-07 01:08:33,992 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 52 treesize of output 1 [2021-12-07 01:08:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-07 01:08:34,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:34,230 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 29 treesize of output 17 [2021-12-07 01:08:34,290 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-07 01:08:34,291 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 31 treesize of output 26 [2021-12-07 01:08:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-07 01:08:34,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955076818] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:08:34,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:08:34,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 23 [2021-12-07 01:08:34,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661975882] [2021-12-07 01:08:34,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:34,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 01:08:34,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:34,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 01:08:34,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:08:34,338 INFO L87 Difference]: Start difference. First operand 254 states and 292 transitions. Second operand has 23 states, 21 states have (on average 6.904761904761905) internal successors, (145), 19 states have internal predecessors, (145), 7 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (23), 5 states have call predecessors, (23), 7 states have call successors, (23) [2021-12-07 01:08:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:35,432 INFO L93 Difference]: Finished difference Result 410 states and 469 transitions. [2021-12-07 01:08:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:08:35,432 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 6.904761904761905) internal successors, (145), 19 states have internal predecessors, (145), 7 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (23), 5 states have call predecessors, (23), 7 states have call successors, (23) Word has length 124 [2021-12-07 01:08:35,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:35,434 INFO L225 Difference]: With dead ends: 410 [2021-12-07 01:08:35,434 INFO L226 Difference]: Without dead ends: 264 [2021-12-07 01:08:35,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 265 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 01:08:35,435 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 197 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:35,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 517 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1182 Invalid, 0 Unknown, 356 Unchecked, 0.7s Time] [2021-12-07 01:08:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-07 01:08:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 252. [2021-12-07 01:08:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 190 states have (on average 1.0842105263157895) internal successors, (206), 195 states have internal predecessors, (206), 33 states have call successors, (33), 22 states have call predecessors, (33), 28 states have return successors, (49), 34 states have call predecessors, (49), 32 states have call successors, (49) [2021-12-07 01:08:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 288 transitions. [2021-12-07 01:08:35,447 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 288 transitions. Word has length 124 [2021-12-07 01:08:35,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:35,448 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 288 transitions. [2021-12-07 01:08:35,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 6.904761904761905) internal successors, (145), 19 states have internal predecessors, (145), 7 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (23), 5 states have call predecessors, (23), 7 states have call successors, (23) [2021-12-07 01:08:35,448 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 288 transitions. [2021-12-07 01:08:35,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-07 01:08:35,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:35,449 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:35,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 01:08:35,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 01:08:35,650 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:08:35,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:35,651 INFO L85 PathProgramCache]: Analyzing trace with hash -445991783, now seen corresponding path program 1 times [2021-12-07 01:08:35,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:35,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035739136] [2021-12-07 01:08:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:35,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:36,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:08:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:36,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:08:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:36,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:08:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:36,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:08:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:36,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:08:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:36,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:08:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:36,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:08:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:36,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:08:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:36,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:08:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:36,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:08:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:36,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:08:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:36,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-07 01:08:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-07 01:08:37,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:37,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035739136] [2021-12-07 01:08:37,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035739136] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:08:37,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513506718] [2021-12-07 01:08:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:37,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:37,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:37,104 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:37,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 01:08:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:37,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 2712 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-07 01:08:37,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:37,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:08:39,581 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_58| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_58|) 8) 1) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_58|)) is different from true [2021-12-07 01:08:41,677 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_59| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_59|) 8) 1) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_59|)) is different from true [2021-12-07 01:08:43,820 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_29| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_29|) 8) 1) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_29|)) is different from true [2021-12-07 01:09:06,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:09:06,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-12-07 01:09:14,710 WARN L860 $PredicateComparison]: unable to prove that (exists ((memset_impl_~sp~0.base Int)) (and (<= memset_impl_~sp~0.base |c_memset_impl_#in~s.base|) (exists ((v_ArrVal_1743 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_1743))))) is different from true [2021-12-07 01:09:14,740 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1743 (Array Int Int)) (memset_impl_~sp~0.base Int)) (and (<= memset_impl_~sp~0.base |c_my_memset_#in~s.base|) (= |c_#memory_int| (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_1743)))) is different from true [2021-12-07 01:09:14,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:09:14,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-07 01:09:14,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:09:14,829 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 24 treesize of output 23 [2021-12-07 01:09:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 18 refuted. 6 times theorem prover too weak. 14 trivial. 42 not checked. [2021-12-07 01:09:35,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:09:35,873 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1753 (Array Int Int)) (v_memset_impl_~sp~0.base_28 Int)) (or (not (= (mod (select (select (store |c_#memory_int| v_memset_impl_~sp~0.base_28 v_ArrVal_1753) |c_aws_byte_buf_secure_zero_~buf#1.base|) (+ 16 |c_aws_byte_buf_secure_zero_~buf#1.offset|)) 18446744073709551616) 0)) (< |c_aws_byte_buf_secure_zero_aws_secure_zero_~pBuf#1.base| v_memset_impl_~sp~0.base_28))) is different from false [2021-12-07 01:09:35,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513506718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:09:35,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:09:35,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 57 [2021-12-07 01:09:35,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248934857] [2021-12-07 01:09:35,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:09:35,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-07 01:09:35,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-07 01:09:35,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2903, Unknown=27, NotChecked=678, Total=3782 [2021-12-07 01:09:35,877 INFO L87 Difference]: Start difference. First operand 252 states and 288 transitions. Second operand has 57 states, 52 states have (on average 2.923076923076923) internal successors, (152), 48 states have internal predecessors, (152), 20 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) [2021-12-07 01:11:15,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:15,018 INFO L93 Difference]: Finished difference Result 391 states and 437 transitions. [2021-12-07 01:11:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-07 01:11:15,019 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 52 states have (on average 2.923076923076923) internal successors, (152), 48 states have internal predecessors, (152), 20 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) Word has length 124 [2021-12-07 01:11:15,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:15,020 INFO L225 Difference]: With dead ends: 391 [2021-12-07 01:11:15,020 INFO L226 Difference]: Without dead ends: 276 [2021-12-07 01:11:15,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 142 SyntacticMatches, 8 SemanticMatches, 95 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 156.3s TimeCoverageRelationStatistics Valid=477, Invalid=7642, Unknown=95, NotChecked=1098, Total=9312 [2021-12-07 01:11:15,023 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 194 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 5084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2409 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:15,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 1093 Invalid, 5084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2559 Invalid, 0 Unknown, 2409 Unchecked, 1.3s Time] [2021-12-07 01:11:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-07 01:11:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 253. [2021-12-07 01:11:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 191 states have (on average 1.0837696335078535) internal successors, (207), 196 states have internal predecessors, (207), 33 states have call successors, (33), 22 states have call predecessors, (33), 28 states have return successors, (48), 34 states have call predecessors, (48), 32 states have call successors, (48) [2021-12-07 01:11:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 288 transitions. [2021-12-07 01:11:15,036 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 288 transitions. Word has length 124 [2021-12-07 01:11:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:15,036 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 288 transitions. [2021-12-07 01:11:15,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 52 states have (on average 2.923076923076923) internal successors, (152), 48 states have internal predecessors, (152), 20 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) [2021-12-07 01:11:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 288 transitions. [2021-12-07 01:11:15,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 01:11:15,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:15,037 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:15,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 01:11:15,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:15,238 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:15,239 INFO L85 PathProgramCache]: Analyzing trace with hash -135458211, now seen corresponding path program 2 times [2021-12-07 01:11:15,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:15,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032296637] [2021-12-07 01:11:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:15,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:11:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:11:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:11:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:11:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:11:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:11:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:11:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:11:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:11:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:11:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:11:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:11:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-07 01:11:15,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:15,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032296637] [2021-12-07 01:11:15,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032296637] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:11:15,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117390030] [2021-12-07 01:11:15,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:11:15,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:15,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:15,585 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:15,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 01:11:16,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:11:16,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:16,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 2726 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-07 01:11:16,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:11:17,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:17,546 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 26 treesize of output 14 [2021-12-07 01:11:17,579 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-07 01:11:17,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-07 01:11:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-07 01:11:17,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117390030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:17,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:11:17,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 23 [2021-12-07 01:11:17,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731496911] [2021-12-07 01:11:17,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:17,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 01:11:17,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 01:11:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:11:17,624 INFO L87 Difference]: Start difference. First operand 253 states and 288 transitions. Second operand has 23 states, 21 states have (on average 6.857142857142857) internal successors, (144), 19 states have internal predecessors, (144), 7 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (23), 5 states have call predecessors, (23), 7 states have call successors, (23) [2021-12-07 01:11:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:18,742 INFO L93 Difference]: Finished difference Result 421 states and 475 transitions. [2021-12-07 01:11:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:11:18,742 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 6.857142857142857) internal successors, (144), 19 states have internal predecessors, (144), 7 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (23), 5 states have call predecessors, (23), 7 states have call successors, (23) Word has length 126 [2021-12-07 01:11:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:18,744 INFO L225 Difference]: With dead ends: 421 [2021-12-07 01:11:18,744 INFO L226 Difference]: Without dead ends: 272 [2021-12-07 01:11:18,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 268 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 01:11:18,745 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 222 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:18,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 473 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1088 Invalid, 0 Unknown, 429 Unchecked, 0.7s Time] [2021-12-07 01:11:18,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-07 01:11:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 249. [2021-12-07 01:11:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 189 states have (on average 1.0793650793650793) internal successors, (204), 194 states have internal predecessors, (204), 31 states have call successors, (31), 22 states have call predecessors, (31), 28 states have return successors, (43), 32 states have call predecessors, (43), 30 states have call successors, (43) [2021-12-07 01:11:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 278 transitions. [2021-12-07 01:11:18,757 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 278 transitions. Word has length 126 [2021-12-07 01:11:18,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:18,757 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 278 transitions. [2021-12-07 01:11:18,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 6.857142857142857) internal successors, (144), 19 states have internal predecessors, (144), 7 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (23), 5 states have call predecessors, (23), 7 states have call successors, (23) [2021-12-07 01:11:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 278 transitions. [2021-12-07 01:11:18,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 01:11:18,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:18,758 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:18,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 01:11:18,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 01:11:18,959 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:18,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:18,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1130151909, now seen corresponding path program 2 times [2021-12-07 01:11:18,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:18,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086057725] [2021-12-07 01:11:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:18,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:19,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:11:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:19,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:11:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:19,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:11:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:19,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:11:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:19,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:11:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:19,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:11:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:19,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:11:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:19,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:11:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:19,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:11:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:20,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:11:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:20,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:11:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:20,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:11:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-07 01:11:20,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:20,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086057725] [2021-12-07 01:11:20,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086057725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:11:20,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8294751] [2021-12-07 01:11:20,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:11:20,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:20,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:20,694 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:20,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 01:11:21,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:11:21,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:21,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 2731 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-07 01:11:21,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:21,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:11:22,149 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:11:22,150 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 [2021-12-07 01:11:22,185 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 11 treesize of output 7 [2021-12-07 01:11:24,218 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_68| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_68|) 8) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_68|))) is different from true [2021-12-07 01:11:26,321 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_69| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_69| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_69|) 8)))) is different from true [2021-12-07 01:11:28,441 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_36| Int)) (not (= |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_36| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_36|) 8)))) is different from true [2021-12-07 01:12:02,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:12:02,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-12-07 01:12:09,037 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2132 (Array Int Int))) (= (store |c_old(#memory_int)| |c_memset_impl_#in~s.base| v_ArrVal_2132) |c_#memory_int|)) is different from true [2021-12-07 01:12:09,047 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2132 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_my_memset_#in~s.base| v_ArrVal_2132))) is different from true [2021-12-07 01:12:09,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-07 01:12:09,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:12:09,140 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 24 treesize of output 23 [2021-12-07 01:12:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 8 proven. 31 refuted. 6 times theorem prover too weak. 10 trivial. 48 not checked. [2021-12-07 01:12:30,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:12:32,506 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2143 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_aws_byte_buf_secure_zero_aws_secure_zero_~pBuf#1.base| v_ArrVal_2143) |c_aws_byte_buf_secure_zero_~buf#1.base|) (+ 16 |c_aws_byte_buf_secure_zero_~buf#1.offset|)) 18446744073709551616) 0))) is different from false [2021-12-07 01:12:32,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8294751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:12:32,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:12:32,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 56 [2021-12-07 01:12:32,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038111957] [2021-12-07 01:12:32,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:12:32,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-07 01:12:32,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:12:32,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-07 01:12:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2783, Unknown=30, NotChecked=666, Total=3660 [2021-12-07 01:12:32,510 INFO L87 Difference]: Start difference. First operand 249 states and 278 transitions. Second operand has 56 states, 51 states have (on average 3.019607843137255) internal successors, (154), 47 states have internal predecessors, (154), 17 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2021-12-07 01:15:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:15:04,701 INFO L93 Difference]: Finished difference Result 465 states and 530 transitions. [2021-12-07 01:15:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-07 01:15:04,701 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 51 states have (on average 3.019607843137255) internal successors, (154), 47 states have internal predecessors, (154), 17 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) Word has length 126 [2021-12-07 01:15:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:15:04,703 INFO L225 Difference]: With dead ends: 465 [2021-12-07 01:15:04,703 INFO L226 Difference]: Without dead ends: 355 [2021-12-07 01:15:04,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 141 SyntacticMatches, 16 SemanticMatches, 91 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 221.4s TimeCoverageRelationStatistics Valid=456, Invalid=6953, Unknown=97, NotChecked=1050, Total=8556 [2021-12-07 01:15:04,704 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 298 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 5530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2863 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:15:04,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 1197 Invalid, 5530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2486 Invalid, 0 Unknown, 2863 Unchecked, 1.2s Time] [2021-12-07 01:15:04,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-07 01:15:04,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 324. [2021-12-07 01:15:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 244 states have (on average 1.0737704918032787) internal successors, (262), 250 states have internal predecessors, (262), 45 states have call successors, (45), 28 states have call predecessors, (45), 34 states have return successors, (70), 45 states have call predecessors, (70), 44 states have call successors, (70) [2021-12-07 01:15:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 377 transitions. [2021-12-07 01:15:04,723 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 377 transitions. Word has length 126 [2021-12-07 01:15:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:15:04,723 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 377 transitions. [2021-12-07 01:15:04,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 51 states have (on average 3.019607843137255) internal successors, (154), 47 states have internal predecessors, (154), 17 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2021-12-07 01:15:04,723 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 377 transitions. [2021-12-07 01:15:04,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-07 01:15:04,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:15:04,725 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:15:04,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 01:15:04,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-07 01:15:04,926 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:15:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:15:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1478036707, now seen corresponding path program 3 times [2021-12-07 01:15:04,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:15:04,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191364864] [2021-12-07 01:15:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:15:04,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:15:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:05,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:15:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:05,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:15:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:05,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:15:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:05,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:15:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:05,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:15:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:05,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:15:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:05,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:15:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:05,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:15:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:05,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:15:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:05,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:15:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:06,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:15:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:06,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-07 01:15:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-07 01:15:06,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:15:06,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191364864] [2021-12-07 01:15:06,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191364864] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:15:06,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933512263] [2021-12-07 01:15:06,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:15:06,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:15:06,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:15:06,173 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:15:06,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f5e35-f578-44c2-8764-7e54125ece79/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 01:15:07,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-07 01:15:07,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:15:07,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-07 01:15:07,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:15:07,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:15:09,952 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_74| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_74|) 8) 1) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_74|)) is different from true [2021-12-07 01:15:12,027 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_75| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_75|) 8) 1) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_75|)) is different from true [2021-12-07 01:15:14,139 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_41| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_41|) 8) 1) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_41|)) is different from true [2021-12-07 01:15:16,222 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_42| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_42|) 8) 1) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_42|)) is different from true [2021-12-07 01:15:16,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:15:16,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-12-07 01:15:16,688 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2368 (Array Int Int)) (memset_impl_~sp~0.base Int)) (and (<= memset_impl_~sp~0.base |c_memset_impl_#in~s.base|) (= |c_#memory_int| (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_2368)))) (< 0 (mod |c_memset_impl_#in~n| 18446744073709551616))) is different from true [2021-12-07 01:15:16,727 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2368 (Array Int Int)) (memset_impl_~sp~0.base Int)) (and (<= memset_impl_~sp~0.base |c_my_memset_#in~s.base|) (= |c_#memory_int| (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_2368)))) (< 0 (mod |c_my_memset_#in~n| 18446744073709551616))) is different from true [2021-12-07 01:15:16,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:15:16,749 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 18 treesize of output 20 [2021-12-07 01:15:16,774 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 31 treesize of output 26 [2021-12-07 01:15:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 16 proven. 4 refuted. 8 times theorem prover too weak. 24 trivial. 60 not checked. [2021-12-07 01:15:19,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:15:19,555 WARN L838 $PredicateComparison]: unable to prove that (or (<= (mod |c_aws_byte_buf_secure_zero_aws_secure_zero_~bufsize#1| 18446744073709551616) 0) (forall ((v_memset_impl_~sp~0.base_44 Int) (v_ArrVal_2380 (Array Int Int))) (or (< 0 (mod (select (select (store |c_#memory_int| v_memset_impl_~sp~0.base_44 v_ArrVal_2380) |c_aws_byte_buf_secure_zero_~buf#1.base|) (+ 16 |c_aws_byte_buf_secure_zero_~buf#1.offset|)) 18446744073709551616)) (< |c_aws_byte_buf_secure_zero_aws_secure_zero_~pBuf#1.base| v_memset_impl_~sp~0.base_44)))) is different from false [2021-12-07 01:15:19,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933512263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:15:19,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:15:19,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 52 [2021-12-07 01:15:19,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053573024] [2021-12-07 01:15:19,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:15:19,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-07 01:15:19,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:15:19,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-07 01:15:19,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2294, Unknown=9, NotChecked=714, Total=3192 [2021-12-07 01:15:19,558 INFO L87 Difference]: Start difference. First operand 324 states and 377 transitions. Second operand has 52 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 44 states have internal predecessors, (163), 20 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (24), 18 states have call predecessors, (24), 19 states have call successors, (24)