./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_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_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/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_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/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_02fdb0cc-645c-4297-9cde-3bab7d439e57/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 b1e17fda858e874821809b4efef78fd91cf6fdf1723d3ff0faf91ee901e13b86 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:39:07,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:39:07,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:39:08,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:39:08,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:39:08,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:39:08,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:39:08,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:39:08,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:39:08,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:39:08,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:39:08,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:39:08,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:39:08,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:39:08,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:39:08,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:39:08,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:39:08,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:39:08,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:39:08,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:39:08,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:39:08,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:39:08,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:39:08,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:39:08,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:39:08,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:39:08,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:39:08,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:39:08,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:39:08,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:39:08,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:39:08,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:39:08,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:39:08,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:39:08,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:39:08,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:39:08,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:39:08,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:39:08,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:39:08,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:39:08,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:39:08,042 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 22:39:08,059 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:39:08,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:39:08,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:39:08,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:39:08,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:39:08,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:39:08,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:39:08,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:39:08,061 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:39:08,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:39:08,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:39:08,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:39:08,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:39:08,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:39:08,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:39:08,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:39:08,062 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:39:08,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:39:08,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:39:08,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:39:08,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:39:08,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:39:08,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:39:08,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:39:08,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:39:08,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:39:08,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:39:08,063 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:39:08,063 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:39:08,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:39:08,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:39:08,064 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_02fdb0cc-645c-4297-9cde-3bab7d439e57/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1e17fda858e874821809b4efef78fd91cf6fdf1723d3ff0faf91ee901e13b86 [2021-12-06 22:39:08,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:39:08,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:39:08,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:39:08,263 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:39:08,264 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:39:08,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i [2021-12-06 22:39:08,308 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/data/a790e82ce/0ec43a5315004c49a21b0dfdb72e44e9/FLAG5b21fe039 [2021-12-06 22:39:08,857 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:39:08,858 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i [2021-12-06 22:39:08,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/data/a790e82ce/0ec43a5315004c49a21b0dfdb72e44e9/FLAG5b21fe039 [2021-12-06 22:39:09,343 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/data/a790e82ce/0ec43a5315004c49a21b0dfdb72e44e9 [2021-12-06 22:39:09,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:39:09,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:39:09,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:39:09,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:39:09,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:39:09,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:39:09" (1/1) ... [2021-12-06 22:39:09,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c77dfa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:09, skipping insertion in model container [2021-12-06 22:39:09,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:39:09" (1/1) ... [2021-12-06 22:39:09,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:39:09,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:39:09,603 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_02fdb0cc-645c-4297-9cde-3bab7d439e57/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4501,4514] [2021-12-06 22:39:09,608 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_02fdb0cc-645c-4297-9cde-3bab7d439e57/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4561,4574] [2021-12-06 22:39:10,318 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,319 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,319 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,320 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,321 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,330 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,331 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,332 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,333 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,613 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 22:39:10,614 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 22:39:10,615 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 22:39:10,616 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 22:39:10,617 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 22:39:10,617 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 22:39:10,618 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 22:39:10,618 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 22:39:10,619 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 22:39:10,619 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 22:39:10,741 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 22:39:10,758 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,758 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,830 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,830 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:39:10,909 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:39:10,918 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_02fdb0cc-645c-4297-9cde-3bab7d439e57/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4501,4514] [2021-12-06 22:39:10,919 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_02fdb0cc-645c-4297-9cde-3bab7d439e57/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4561,4574] [2021-12-06 22:39:10,943 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,943 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,943 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,944 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,944 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,948 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,948 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,949 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,949 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,971 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 22:39:10,972 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 22:39:10,972 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 22:39:10,973 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 22:39:10,973 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 22:39:10,974 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 22:39:10,974 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 22:39:10,974 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 22:39:10,975 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 22:39:10,975 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 22:39:10,989 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 22:39:10,999 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:10,999 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:11,054 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:11,055 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:39:11,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:39:11,241 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:39:11,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:11 WrapperNode [2021-12-06 22:39:11,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:39:11,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:39:11,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:39:11,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:39:11,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:11" (1/1) ... [2021-12-06 22:39:11,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:11" (1/1) ... [2021-12-06 22:39:11,386 INFO L137 Inliner]: procedures = 691, calls = 2637, calls flagged for inlining = 61, calls inlined = 11, statements flattened = 1065 [2021-12-06 22:39:11,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:39:11,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:39:11,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:39:11,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:39:11,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:11" (1/1) ... [2021-12-06 22:39:11,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:11" (1/1) ... [2021-12-06 22:39:11,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:11" (1/1) ... [2021-12-06 22:39:11,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:11" (1/1) ... [2021-12-06 22:39:11,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:11" (1/1) ... [2021-12-06 22:39:11,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:11" (1/1) ... [2021-12-06 22:39:11,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:11" (1/1) ... [2021-12-06 22:39:11,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:39:11,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:39:11,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:39:11,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:39:11,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:11" (1/1) ... [2021-12-06 22:39:11,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:39:11,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:11,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:39:11,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:39:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-06 22:39:11,530 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-06 22:39:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-06 22:39:11,530 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-06 22:39:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:39:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-06 22:39:11,530 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-06 22:39:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-12-06 22:39:11,530 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-12-06 22:39:11,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:39:11,531 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-06 22:39:11,531 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-06 22:39:11,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 22:39:11,531 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 22:39:11,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 22:39:11,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:39:11,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 22:39:11,531 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-06 22:39:11,531 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-06 22:39:11,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:39:11,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:39:11,532 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-06 22:39:11,532 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-06 22:39:11,532 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-12-06 22:39:11,532 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-12-06 22:39:11,532 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-12-06 22:39:11,532 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-12-06 22:39:11,532 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 22:39:11,532 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 22:39:11,532 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-06 22:39:11,532 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-06 22:39:11,532 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2021-12-06 22:39:11,532 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2021-12-06 22:39:11,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:39:11,533 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-12-06 22:39:11,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-12-06 22:39:11,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 22:39:11,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 22:39:11,533 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-06 22:39:11,533 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-06 22:39:11,533 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-12-06 22:39:11,533 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-12-06 22:39:11,533 INFO L130 BoogieDeclarations]: Found specification of procedure assert_bytes_match [2021-12-06 22:39:11,533 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_bytes_match [2021-12-06 22:39:11,533 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-06 22:39:11,534 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-06 22:39:11,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:39:11,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:39:11,743 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:39:11,745 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:39:12,698 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:39:12,705 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:39:12,705 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 22:39:12,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:39:12 BoogieIcfgContainer [2021-12-06 22:39:12,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:39:12,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:39:12,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:39:12,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:39:12,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:39:09" (1/3) ... [2021-12-06 22:39:12,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c813d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:39:12, skipping insertion in model container [2021-12-06 22:39:12,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:39:11" (2/3) ... [2021-12-06 22:39:12,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c813d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:39:12, skipping insertion in model container [2021-12-06 22:39:12,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:39:12" (3/3) ... [2021-12-06 22:39:12,713 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_append_dynamic_harness.i [2021-12-06 22:39:12,717 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:39:12,717 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:39:12,752 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:39:12,757 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:39:12,757 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:39:12,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 248 states, 156 states have (on average 1.2371794871794872) internal successors, (193), 157 states have internal predecessors, (193), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 22:39:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 22:39:12,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:12,783 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:12,783 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:12,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:12,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1072542744, now seen corresponding path program 1 times [2021-12-06 22:39:12,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:12,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020516277] [2021-12-06 22:39:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:12,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 22:39:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 22:39:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 22:39:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:39:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:39:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:39:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:39:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:39:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-06 22:39:13,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:13,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020516277] [2021-12-06 22:39:13,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020516277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:13,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:39:13,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:39:13,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538618519] [2021-12-06 22:39:13,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:13,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:39:13,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:13,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:39:13,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:39:13,317 INFO L87 Difference]: Start difference. First operand has 248 states, 156 states have (on average 1.2371794871794872) internal successors, (193), 157 states have internal predecessors, (193), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:39:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:13,610 INFO L93 Difference]: Finished difference Result 500 states and 722 transitions. [2021-12-06 22:39:13,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:39:13,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 83 [2021-12-06 22:39:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:13,622 INFO L225 Difference]: With dead ends: 500 [2021-12-06 22:39:13,622 INFO L226 Difference]: Without dead ends: 255 [2021-12-06 22:39:13,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:39:13,630 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 97 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:13,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 403 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:39:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-06 22:39:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 243. [2021-12-06 22:39:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 152 states have (on average 1.2171052631578947) internal successors, (185), 153 states have internal predecessors, (185), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-12-06 22:39:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 328 transitions. [2021-12-06 22:39:13,681 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 328 transitions. Word has length 83 [2021-12-06 22:39:13,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:13,681 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 328 transitions. [2021-12-06 22:39:13,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:39:13,682 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 328 transitions. [2021-12-06 22:39:13,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 22:39:13,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:13,685 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:13,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:39:13,686 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:13,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:13,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2014404208, now seen corresponding path program 1 times [2021-12-06 22:39:13,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:13,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264604400] [2021-12-06 22:39:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:13,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 22:39:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 22:39:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 22:39:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:39:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:39:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:39:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:39:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:39:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 22:39:13,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:13,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264604400] [2021-12-06 22:39:13,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264604400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:13,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274373462] [2021-12-06 22:39:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:13,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:13,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:13,965 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:13,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:39:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 22:39:14,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 22:39:14,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:39:14,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274373462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:14,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:39:14,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-06 22:39:14,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285547163] [2021-12-06 22:39:14,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:14,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:39:14,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:39:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:39:14,494 INFO L87 Difference]: Start difference. First operand 243 states and 328 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 22:39:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:14,723 INFO L93 Difference]: Finished difference Result 478 states and 649 transitions. [2021-12-06 22:39:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:39:14,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 85 [2021-12-06 22:39:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:14,727 INFO L225 Difference]: With dead ends: 478 [2021-12-06 22:39:14,727 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 22:39:14,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:39:14,731 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 371 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:14,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 965 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:39:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 22:39:14,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2021-12-06 22:39:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 154 states have (on average 1.2142857142857142) internal successors, (187), 156 states have internal predecessors, (187), 72 states have call successors, (72), 18 states have call predecessors, (72), 19 states have return successors, (76), 71 states have call predecessors, (76), 71 states have call successors, (76) [2021-12-06 22:39:14,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 335 transitions. [2021-12-06 22:39:14,759 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 335 transitions. Word has length 85 [2021-12-06 22:39:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:14,759 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 335 transitions. [2021-12-06 22:39:14,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 22:39:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 335 transitions. [2021-12-06 22:39:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 22:39:14,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:14,762 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:14,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:39:14,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:14,963 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:14,963 INFO L85 PathProgramCache]: Analyzing trace with hash -756708827, now seen corresponding path program 1 times [2021-12-06 22:39:14,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:14,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941376467] [2021-12-06 22:39:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:14,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 22:39:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:39:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:39:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:39:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:39:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:39:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:39:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:39:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 22:39:15,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:15,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941376467] [2021-12-06 22:39:15,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941376467] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:15,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588253776] [2021-12-06 22:39:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:15,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:15,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:15,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:15,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:39:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:15,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:39:15,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 22:39:15,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:39:15,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588253776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:15,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:39:15,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-12-06 22:39:15,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075898773] [2021-12-06 22:39:15,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:15,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:39:15,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:15,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:39:15,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:39:15,689 INFO L87 Difference]: Start difference. First operand 246 states and 335 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 22:39:15,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:15,921 INFO L93 Difference]: Finished difference Result 469 states and 634 transitions. [2021-12-06 22:39:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:39:15,922 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 91 [2021-12-06 22:39:15,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:15,925 INFO L225 Difference]: With dead ends: 469 [2021-12-06 22:39:15,925 INFO L226 Difference]: Without dead ends: 243 [2021-12-06 22:39:15,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-12-06 22:39:15,928 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 429 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:15,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 1136 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:39:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-06 22:39:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2021-12-06 22:39:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 152 states have (on average 1.2105263157894737) internal successors, (184), 153 states have internal predecessors, (184), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-12-06 22:39:15,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 327 transitions. [2021-12-06 22:39:15,952 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 327 transitions. Word has length 91 [2021-12-06 22:39:15,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:15,953 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 327 transitions. [2021-12-06 22:39:15,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 22:39:15,953 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 327 transitions. [2021-12-06 22:39:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 22:39:15,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:15,956 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:15,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:39:16,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:16,158 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:16,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1459419536, now seen corresponding path program 1 times [2021-12-06 22:39:16,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:16,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631058363] [2021-12-06 22:39:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:16,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 22:39:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:39:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:39:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:39:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:39:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:39:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:39:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:39:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 22:39:16,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:16,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631058363] [2021-12-06 22:39:16,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631058363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:16,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860147634] [2021-12-06 22:39:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:16,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:16,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:16,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:16,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:39:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:16,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 22:39:16,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 22:39:16,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:39:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 22:39:16,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860147634] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:39:16,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:39:16,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-06 22:39:16,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205478158] [2021-12-06 22:39:16,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:39:16,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 22:39:16,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:16,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 22:39:16,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:39:16,988 INFO L87 Difference]: Start difference. First operand 243 states and 327 transitions. Second operand has 12 states, 12 states have (on average 9.0) internal successors, (108), 11 states have internal predecessors, (108), 7 states have call successors, (31), 4 states have call predecessors, (31), 5 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2021-12-06 22:39:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:17,478 INFO L93 Difference]: Finished difference Result 481 states and 648 transitions. [2021-12-06 22:39:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:39:17,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.0) internal successors, (108), 11 states have internal predecessors, (108), 7 states have call successors, (31), 4 states have call predecessors, (31), 5 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) Word has length 97 [2021-12-06 22:39:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:17,481 INFO L225 Difference]: With dead ends: 481 [2021-12-06 22:39:17,482 INFO L226 Difference]: Without dead ends: 258 [2021-12-06 22:39:17,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:39:17,484 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 456 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:17,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 772 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:39:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-06 22:39:17,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 246. [2021-12-06 22:39:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 154 states have (on average 1.2077922077922079) internal successors, (186), 156 states have internal predecessors, (186), 72 states have call successors, (72), 18 states have call predecessors, (72), 19 states have return successors, (76), 71 states have call predecessors, (76), 71 states have call successors, (76) [2021-12-06 22:39:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 334 transitions. [2021-12-06 22:39:17,508 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 334 transitions. Word has length 97 [2021-12-06 22:39:17,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:17,509 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 334 transitions. [2021-12-06 22:39:17,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.0) internal successors, (108), 11 states have internal predecessors, (108), 7 states have call successors, (31), 4 states have call predecessors, (31), 5 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2021-12-06 22:39:17,510 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 334 transitions. [2021-12-06 22:39:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 22:39:17,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:17,512 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:17,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:39:17,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:17,713 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:17,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:17,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2034657995, now seen corresponding path program 1 times [2021-12-06 22:39:17,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:17,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494604737] [2021-12-06 22:39:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:17,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 22:39:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:39:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:39:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 22:39:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:39:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 22:39:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 22:39:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:39:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 22:39:17,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:17,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494604737] [2021-12-06 22:39:17,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494604737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:17,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:39:17,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:39:17,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483535492] [2021-12-06 22:39:17,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:17,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:39:17,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:39:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:39:17,926 INFO L87 Difference]: Start difference. First operand 246 states and 334 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 22:39:18,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:18,300 INFO L93 Difference]: Finished difference Result 478 states and 642 transitions. [2021-12-06 22:39:18,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:39:18,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 99 [2021-12-06 22:39:18,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:18,302 INFO L225 Difference]: With dead ends: 478 [2021-12-06 22:39:18,302 INFO L226 Difference]: Without dead ends: 255 [2021-12-06 22:39:18,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:39:18,304 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 239 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:18,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 809 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:39:18,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-06 22:39:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 243. [2021-12-06 22:39:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 153 states have internal predecessors, (183), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-12-06 22:39:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 326 transitions. [2021-12-06 22:39:18,326 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 326 transitions. Word has length 99 [2021-12-06 22:39:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:18,327 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 326 transitions. [2021-12-06 22:39:18,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 22:39:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 326 transitions. [2021-12-06 22:39:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:39:18,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:18,329 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:18,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:39:18,329 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:18,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:18,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1162403066, now seen corresponding path program 1 times [2021-12-06 22:39:18,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:18,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233742657] [2021-12-06 22:39:18,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:18,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 22:39:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:39:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:39:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 22:39:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:39:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 22:39:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 22:39:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 22:39:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 22:39:18,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:18,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233742657] [2021-12-06 22:39:18,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233742657] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:18,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708992952] [2021-12-06 22:39:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:18,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:18,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:18,768 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:18,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:39:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:19,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 2612 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 22:39:19,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:19,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:39:19,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-06 22:39:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 22:39:19,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:39:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 22:39:19,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708992952] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:39:19,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:39:19,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 17 [2021-12-06 22:39:19,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084953351] [2021-12-06 22:39:19,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:39:19,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:39:19,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:19,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:39:19,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:39:19,928 INFO L87 Difference]: Start difference. First operand 243 states and 326 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 14 states have internal predecessors, (90), 8 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-12-06 22:39:21,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:21,745 INFO L93 Difference]: Finished difference Result 608 states and 831 transitions. [2021-12-06 22:39:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 22:39:21,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 14 states have internal predecessors, (90), 8 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 101 [2021-12-06 22:39:21,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:21,749 INFO L225 Difference]: With dead ends: 608 [2021-12-06 22:39:21,750 INFO L226 Difference]: Without dead ends: 401 [2021-12-06 22:39:21,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 207 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 22:39:21,752 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 285 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:21,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 2361 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1917 Invalid, 0 Unknown, 538 Unchecked, 1.3s Time] [2021-12-06 22:39:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-12-06 22:39:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 290. [2021-12-06 22:39:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.2063492063492063) internal successors, (228), 190 states have internal predecessors, (228), 78 states have call successors, (78), 21 states have call predecessors, (78), 22 states have return successors, (85), 78 states have call predecessors, (85), 77 states have call successors, (85) [2021-12-06 22:39:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 391 transitions. [2021-12-06 22:39:21,773 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 391 transitions. Word has length 101 [2021-12-06 22:39:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:21,774 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 391 transitions. [2021-12-06 22:39:21,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 14 states have internal predecessors, (90), 8 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-12-06 22:39:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 391 transitions. [2021-12-06 22:39:21,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 22:39:21,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:21,775 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:21,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:39:21,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 22:39:21,977 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:21,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1694138625, now seen corresponding path program 1 times [2021-12-06 22:39:21,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:21,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617822767] [2021-12-06 22:39:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:21,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 22:39:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:39:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:39:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 22:39:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:39:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 22:39:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 22:39:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 22:39:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:39:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 22:39:22,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:22,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617822767] [2021-12-06 22:39:22,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617822767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:22,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:39:22,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 22:39:22,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541770351] [2021-12-06 22:39:22,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:22,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:39:22,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:22,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:39:22,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:39:22,211 INFO L87 Difference]: Start difference. First operand 290 states and 391 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 22:39:22,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:22,626 INFO L93 Difference]: Finished difference Result 399 states and 531 transitions. [2021-12-06 22:39:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:39:22,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 105 [2021-12-06 22:39:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:22,629 INFO L225 Difference]: With dead ends: 399 [2021-12-06 22:39:22,629 INFO L226 Difference]: Without dead ends: 328 [2021-12-06 22:39:22,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:39:22,630 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 210 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:22,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 1341 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:39:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-06 22:39:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 292. [2021-12-06 22:39:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 191 states have (on average 1.2041884816753927) internal successors, (230), 192 states have internal predecessors, (230), 78 states have call successors, (78), 21 states have call predecessors, (78), 22 states have return successors, (85), 78 states have call predecessors, (85), 77 states have call successors, (85) [2021-12-06 22:39:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 393 transitions. [2021-12-06 22:39:22,646 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 393 transitions. Word has length 105 [2021-12-06 22:39:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:22,646 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 393 transitions. [2021-12-06 22:39:22,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 22:39:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 393 transitions. [2021-12-06 22:39:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 22:39:22,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:22,648 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:22,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:39:22,648 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:22,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1159574532, now seen corresponding path program 1 times [2021-12-06 22:39:22,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:22,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016640369] [2021-12-06 22:39:22,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:22,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 22:39:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:39:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:39:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 22:39:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:39:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 22:39:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 22:39:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 22:39:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:39:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 22:39:23,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:23,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016640369] [2021-12-06 22:39:23,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016640369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:23,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:39:23,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:39:23,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149937056] [2021-12-06 22:39:23,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:23,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:39:23,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:23,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:39:23,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:39:23,375 INFO L87 Difference]: Start difference. First operand 292 states and 393 transitions. Second operand has 16 states, 15 states have (on average 3.933333333333333) internal successors, (59), 13 states have internal predecessors, (59), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-06 22:39:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:24,907 INFO L93 Difference]: Finished difference Result 685 states and 954 transitions. [2021-12-06 22:39:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:39:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.933333333333333) internal successors, (59), 13 states have internal predecessors, (59), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 107 [2021-12-06 22:39:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:24,910 INFO L225 Difference]: With dead ends: 685 [2021-12-06 22:39:24,910 INFO L226 Difference]: Without dead ends: 400 [2021-12-06 22:39:24,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:39:24,912 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 525 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 2762 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 3252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 2762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:24,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 1463 Invalid, 3252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 2762 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 22:39:24,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-06 22:39:24,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 314. [2021-12-06 22:39:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 204 states have (on average 1.1911764705882353) internal successors, (243), 207 states have internal predecessors, (243), 86 states have call successors, (86), 21 states have call predecessors, (86), 23 states have return successors, (99), 85 states have call predecessors, (99), 85 states have call successors, (99) [2021-12-06 22:39:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 428 transitions. [2021-12-06 22:39:24,933 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 428 transitions. Word has length 107 [2021-12-06 22:39:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:24,933 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 428 transitions. [2021-12-06 22:39:24,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.933333333333333) internal successors, (59), 13 states have internal predecessors, (59), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-06 22:39:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 428 transitions. [2021-12-06 22:39:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 22:39:24,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:24,934 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:24,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 22:39:24,935 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:24,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:24,935 INFO L85 PathProgramCache]: Analyzing trace with hash 64245244, now seen corresponding path program 1 times [2021-12-06 22:39:24,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:24,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385352810] [2021-12-06 22:39:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:24,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 22:39:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 22:39:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:39:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:39:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:39:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 22:39:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 22:39:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:39:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 22:39:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-06 22:39:25,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:25,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385352810] [2021-12-06 22:39:25,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385352810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:25,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:39:25,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:39:25,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023237580] [2021-12-06 22:39:25,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:25,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:39:25,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:25,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:39:25,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:39:25,387 INFO L87 Difference]: Start difference. First operand 314 states and 428 transitions. Second operand has 16 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 8 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-06 22:39:26,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:26,976 INFO L93 Difference]: Finished difference Result 424 states and 603 transitions. [2021-12-06 22:39:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:39:26,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 8 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 115 [2021-12-06 22:39:26,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:26,979 INFO L225 Difference]: With dead ends: 424 [2021-12-06 22:39:26,979 INFO L226 Difference]: Without dead ends: 422 [2021-12-06 22:39:26,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:39:26,980 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 477 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 2749 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 3238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 2749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:26,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 1858 Invalid, 3238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 2749 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 22:39:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-06 22:39:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 330. [2021-12-06 22:39:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 213 states have (on average 1.187793427230047) internal successors, (253), 217 states have internal predecessors, (253), 91 states have call successors, (91), 23 states have call predecessors, (91), 25 states have return successors, (104), 89 states have call predecessors, (104), 90 states have call successors, (104) [2021-12-06 22:39:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 448 transitions. [2021-12-06 22:39:27,008 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 448 transitions. Word has length 115 [2021-12-06 22:39:27,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:27,008 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 448 transitions. [2021-12-06 22:39:27,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 8 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-06 22:39:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 448 transitions. [2021-12-06 22:39:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 22:39:27,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:27,010 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:27,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 22:39:27,010 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:27,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:27,011 INFO L85 PathProgramCache]: Analyzing trace with hash -64782454, now seen corresponding path program 1 times [2021-12-06 22:39:27,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:27,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452793403] [2021-12-06 22:39:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:27,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 22:39:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 22:39:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:39:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 22:39:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 22:39:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:39:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:39:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 22:39:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-06 22:39:27,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:27,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452793403] [2021-12-06 22:39:27,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452793403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:27,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103730061] [2021-12-06 22:39:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:27,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:27,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:27,285 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:27,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:39:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:27,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:39:27,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-06 22:39:27,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:39:27,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103730061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:27,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:39:27,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-12-06 22:39:27,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126440872] [2021-12-06 22:39:27,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:27,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:39:27,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:27,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:39:27,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:39:27,696 INFO L87 Difference]: Start difference. First operand 330 states and 448 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:39:27,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:27,841 INFO L93 Difference]: Finished difference Result 681 states and 943 transitions. [2021-12-06 22:39:27,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:39:27,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 117 [2021-12-06 22:39:27,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:27,844 INFO L225 Difference]: With dead ends: 681 [2021-12-06 22:39:27,844 INFO L226 Difference]: Without dead ends: 362 [2021-12-06 22:39:27,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:39:27,846 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 40 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:27,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 1169 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-12-06 22:39:27,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-06 22:39:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 340. [2021-12-06 22:39:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 223 states have (on average 1.1928251121076232) internal successors, (266), 227 states have internal predecessors, (266), 91 states have call successors, (91), 23 states have call predecessors, (91), 25 states have return successors, (104), 89 states have call predecessors, (104), 90 states have call successors, (104) [2021-12-06 22:39:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 461 transitions. [2021-12-06 22:39:27,867 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 461 transitions. Word has length 117 [2021-12-06 22:39:27,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:27,867 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 461 transitions. [2021-12-06 22:39:27,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:39:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 461 transitions. [2021-12-06 22:39:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 22:39:27,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:27,869 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:27,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:39:28,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 22:39:28,069 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:28,070 INFO L85 PathProgramCache]: Analyzing trace with hash -587369526, now seen corresponding path program 1 times [2021-12-06 22:39:28,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:28,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377686196] [2021-12-06 22:39:28,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:28,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 22:39:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 22:39:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:39:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 22:39:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 22:39:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:39:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:39:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 22:39:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-06 22:39:28,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:28,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377686196] [2021-12-06 22:39:28,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377686196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:28,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669581558] [2021-12-06 22:39:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:28,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:28,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:28,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:28,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:39:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:28,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 22:39:28,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:28,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:39:28,762 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 25 treesize of output 24 [2021-12-06 22:39:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 22:39:29,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:39:29,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669581558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:29,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:39:29,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [10] total 25 [2021-12-06 22:39:29,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174825620] [2021-12-06 22:39:29,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:29,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:39:29,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:29,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:39:29,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-12-06 22:39:29,272 INFO L87 Difference]: Start difference. First operand 340 states and 461 transitions. Second operand has 19 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 6 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 22:39:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:29,514 INFO L93 Difference]: Finished difference Result 688 states and 928 transitions. [2021-12-06 22:39:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:39:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 6 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 117 [2021-12-06 22:39:29,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:29,516 INFO L225 Difference]: With dead ends: 688 [2021-12-06 22:39:29,517 INFO L226 Difference]: Without dead ends: 350 [2021-12-06 22:39:29,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-12-06 22:39:29,519 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 23 mSDsluCounter, 2342 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:29,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 2641 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 243 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2021-12-06 22:39:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-06 22:39:29,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 350. [2021-12-06 22:39:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 233 states have (on average 1.1931330472103003) internal successors, (278), 236 states have internal predecessors, (278), 91 states have call successors, (91), 24 states have call predecessors, (91), 25 states have return successors, (104), 89 states have call predecessors, (104), 90 states have call successors, (104) [2021-12-06 22:39:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 473 transitions. [2021-12-06 22:39:29,540 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 473 transitions. Word has length 117 [2021-12-06 22:39:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:29,540 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 473 transitions. [2021-12-06 22:39:29,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 6 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 22:39:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 473 transitions. [2021-12-06 22:39:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 22:39:29,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:29,541 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:29,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:39:29,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:29,742 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:29,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1435610874, now seen corresponding path program 1 times [2021-12-06 22:39:29,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:29,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177765887] [2021-12-06 22:39:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:29,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 22:39:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 22:39:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:39:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 22:39:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 22:39:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:39:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:39:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 22:39:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 22:39:29,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:29,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177765887] [2021-12-06 22:39:29,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177765887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:29,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095807173] [2021-12-06 22:39:29,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:29,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:29,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:29,885 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:29,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:39:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 2652 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 22:39:30,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:39:30,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:39:30,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095807173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:30,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:39:30,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-06 22:39:30,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615942152] [2021-12-06 22:39:30,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:30,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:39:30,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:30,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:39:30,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:39:30,230 INFO L87 Difference]: Start difference. First operand 350 states and 473 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:39:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:30,258 INFO L93 Difference]: Finished difference Result 722 states and 985 transitions. [2021-12-06 22:39:30,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:39:30,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 117 [2021-12-06 22:39:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:30,260 INFO L225 Difference]: With dead ends: 722 [2021-12-06 22:39:30,261 INFO L226 Difference]: Without dead ends: 393 [2021-12-06 22:39:30,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:39:30,262 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 32 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 991 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 [2021-12-06 22:39:30,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 991 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:39:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-06 22:39:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 350. [2021-12-06 22:39:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 233 states have (on average 1.184549356223176) internal successors, (276), 236 states have internal predecessors, (276), 91 states have call successors, (91), 24 states have call predecessors, (91), 25 states have return successors, (104), 89 states have call predecessors, (104), 90 states have call successors, (104) [2021-12-06 22:39:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 471 transitions. [2021-12-06 22:39:30,284 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 471 transitions. Word has length 117 [2021-12-06 22:39:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:30,284 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 471 transitions. [2021-12-06 22:39:30,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:39:30,285 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 471 transitions. [2021-12-06 22:39:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 22:39:30,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:30,286 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:30,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:39:30,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 22:39:30,488 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:30,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1464111164, now seen corresponding path program 1 times [2021-12-06 22:39:30,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:30,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120450577] [2021-12-06 22:39:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:30,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 22:39:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 22:39:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:39:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 22:39:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 22:39:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:39:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:39:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 22:39:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-06 22:39:30,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:30,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120450577] [2021-12-06 22:39:30,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120450577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:30,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461561811] [2021-12-06 22:39:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:30,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:30,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:30,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:30,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:39:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:31,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 2647 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 22:39:31,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:31,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:39:31,132 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 [2021-12-06 22:39:31,136 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 [2021-12-06 22:39:31,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:39:31,274 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 22:39:31,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 22:39:31,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:39:31,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 22:39:31,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:39:31,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 22:39:31,593 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 22:39:31,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 22:39:31,696 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 16 treesize of output 18 [2021-12-06 22:39:31,699 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 16 treesize of output 18 [2021-12-06 22:39:32,238 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 15 treesize of output 7 [2021-12-06 22:39:32,240 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 15 treesize of output 7 [2021-12-06 22:39:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:39:32,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:39:32,392 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_777 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_777) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset| 24)) 0)) (forall ((v_ArrVal_778 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_778) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset| 24)) 0))) is different from false [2021-12-06 22:39:32,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461561811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:32,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:39:32,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-12-06 22:39:32,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549822113] [2021-12-06 22:39:32,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:39:32,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:39:32,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:32,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:39:32,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=528, Unknown=1, NotChecked=46, Total=650 [2021-12-06 22:39:32,406 INFO L87 Difference]: Start difference. First operand 350 states and 471 transitions. Second operand has 23 states, 22 states have (on average 5.909090909090909) internal successors, (130), 21 states have internal predecessors, (130), 10 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2021-12-06 22:39:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:33,567 INFO L93 Difference]: Finished difference Result 846 states and 1133 transitions. [2021-12-06 22:39:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 22:39:33,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.909090909090909) internal successors, (130), 21 states have internal predecessors, (130), 10 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) Word has length 117 [2021-12-06 22:39:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:33,570 INFO L225 Difference]: With dead ends: 846 [2021-12-06 22:39:33,570 INFO L226 Difference]: Without dead ends: 507 [2021-12-06 22:39:33,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 188 SyntacticMatches, 20 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=283, Invalid=2372, Unknown=1, NotChecked=100, Total=2756 [2021-12-06 22:39:33,573 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 180 mSDsluCounter, 3353 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 3722 SdHoareTripleChecker+Invalid, 3176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1341 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:33,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 3722 Invalid, 3176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1743 Invalid, 0 Unknown, 1341 Unchecked, 0.7s Time] [2021-12-06 22:39:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-12-06 22:39:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 459. [2021-12-06 22:39:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 320 states have (on average 1.178125) internal successors, (377), 325 states have internal predecessors, (377), 102 states have call successors, (102), 33 states have call predecessors, (102), 36 states have return successors, (132), 100 states have call predecessors, (132), 101 states have call successors, (132) [2021-12-06 22:39:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 611 transitions. [2021-12-06 22:39:33,598 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 611 transitions. Word has length 117 [2021-12-06 22:39:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:33,598 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 611 transitions. [2021-12-06 22:39:33,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.909090909090909) internal successors, (130), 21 states have internal predecessors, (130), 10 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2021-12-06 22:39:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 611 transitions. [2021-12-06 22:39:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-06 22:39:33,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:33,599 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:33,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 22:39:33,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 22:39:33,802 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:33,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1800764123, now seen corresponding path program 1 times [2021-12-06 22:39:33,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:33,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31484179] [2021-12-06 22:39:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:33,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:39:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:39:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:39:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:39:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:39:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 22:39:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 22:39:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 22:39:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-06 22:39:33,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:33,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31484179] [2021-12-06 22:39:33,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31484179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:33,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065443916] [2021-12-06 22:39:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:33,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:33,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:33,970 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:33,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:39:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 2655 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 22:39:34,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 22:39:34,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:39:34,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065443916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:34,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:39:34,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-06 22:39:34,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86070885] [2021-12-06 22:39:34,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:34,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:39:34,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:39:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:39:34,300 INFO L87 Difference]: Start difference. First operand 459 states and 611 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:39:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:34,329 INFO L93 Difference]: Finished difference Result 871 states and 1176 transitions. [2021-12-06 22:39:34,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:39:34,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2021-12-06 22:39:34,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:34,332 INFO L225 Difference]: With dead ends: 871 [2021-12-06 22:39:34,332 INFO L226 Difference]: Without dead ends: 451 [2021-12-06 22:39:34,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:39:34,334 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 6 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:34,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 971 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:39:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-06 22:39:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 442. [2021-12-06 22:39:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 304 states have (on average 1.1644736842105263) internal successors, (354), 308 states have internal predecessors, (354), 102 states have call successors, (102), 33 states have call predecessors, (102), 35 states have return successors, (129), 100 states have call predecessors, (129), 101 states have call successors, (129) [2021-12-06 22:39:34,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 585 transitions. [2021-12-06 22:39:34,357 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 585 transitions. Word has length 119 [2021-12-06 22:39:34,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:34,357 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 585 transitions. [2021-12-06 22:39:34,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:39:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 585 transitions. [2021-12-06 22:39:34,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-06 22:39:34,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:34,358 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:34,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 22:39:34,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 22:39:34,560 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:34,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1759079071, now seen corresponding path program 1 times [2021-12-06 22:39:34,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:34,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080699618] [2021-12-06 22:39:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:34,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:39:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:39:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:39:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:39:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:39:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 22:39:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 22:39:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 22:39:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-06 22:39:34,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:34,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080699618] [2021-12-06 22:39:34,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080699618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:34,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912937072] [2021-12-06 22:39:34,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:34,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:34,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:34,827 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:34,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:39:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:35,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 2652 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 22:39:35,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:35,192 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 [2021-12-06 22:39:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 22:39:35,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:39:35,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912937072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:35,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:39:35,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [10] total 23 [2021-12-06 22:39:35,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296312886] [2021-12-06 22:39:35,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:35,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:39:35,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:39:35,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:39:35,612 INFO L87 Difference]: Start difference. First operand 442 states and 585 transitions. Second operand has 21 states, 19 states have (on average 4.526315789473684) internal successors, (86), 17 states have internal predecessors, (86), 6 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 22:39:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:35,826 INFO L93 Difference]: Finished difference Result 826 states and 1101 transitions. [2021-12-06 22:39:35,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 22:39:35,826 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.526315789473684) internal successors, (86), 17 states have internal predecessors, (86), 6 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 119 [2021-12-06 22:39:35,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:35,829 INFO L225 Difference]: With dead ends: 826 [2021-12-06 22:39:35,829 INFO L226 Difference]: Without dead ends: 486 [2021-12-06 22:39:35,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:39:35,831 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 33 mSDsluCounter, 3979 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 4291 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:35,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 4291 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 327 Invalid, 0 Unknown, 139 Unchecked, 0.1s Time] [2021-12-06 22:39:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-12-06 22:39:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 461. [2021-12-06 22:39:35,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 321 states have (on average 1.1557632398753894) internal successors, (371), 327 states have internal predecessors, (371), 102 states have call successors, (102), 33 states have call predecessors, (102), 37 states have return successors, (130), 100 states have call predecessors, (130), 101 states have call successors, (130) [2021-12-06 22:39:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 603 transitions. [2021-12-06 22:39:35,854 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 603 transitions. Word has length 119 [2021-12-06 22:39:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:35,854 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 603 transitions. [2021-12-06 22:39:35,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.526315789473684) internal successors, (86), 17 states have internal predecessors, (86), 6 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 22:39:35,855 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 603 transitions. [2021-12-06 22:39:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 22:39:35,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:35,856 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:35,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 22:39:36,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 22:39:36,057 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:36,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:36,058 INFO L85 PathProgramCache]: Analyzing trace with hash -80640444, now seen corresponding path program 1 times [2021-12-06 22:39:36,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:36,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708166898] [2021-12-06 22:39:36,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:36,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:39:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:39:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:39:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:39:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 22:39:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:39:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:39:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:39:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-06 22:39:36,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:36,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708166898] [2021-12-06 22:39:36,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708166898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:36,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795841285] [2021-12-06 22:39:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:36,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:36,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:36,304 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:36,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 22:39:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:36,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 2657 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:39:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 22:39:36,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:39:36,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795841285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:39:36,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:39:36,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-12-06 22:39:36,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446816293] [2021-12-06 22:39:36,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:39:36,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:39:36,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:36,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:39:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:39:36,693 INFO L87 Difference]: Start difference. First operand 461 states and 603 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:39:36,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:39:36,861 INFO L93 Difference]: Finished difference Result 760 states and 1020 transitions. [2021-12-06 22:39:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:39:36,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 121 [2021-12-06 22:39:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:39:36,863 INFO L225 Difference]: With dead ends: 760 [2021-12-06 22:39:36,864 INFO L226 Difference]: Without dead ends: 421 [2021-12-06 22:39:36,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-06 22:39:36,865 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 17 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:39:36,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1169 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2021-12-06 22:39:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-12-06 22:39:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 420. [2021-12-06 22:39:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 289 states have (on average 1.1557093425605536) internal successors, (334), 294 states have internal predecessors, (334), 97 states have call successors, (97), 31 states have call predecessors, (97), 33 states have return successors, (119), 94 states have call predecessors, (119), 96 states have call successors, (119) [2021-12-06 22:39:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 550 transitions. [2021-12-06 22:39:36,896 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 550 transitions. Word has length 121 [2021-12-06 22:39:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:39:36,896 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 550 transitions. [2021-12-06 22:39:36,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:39:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 550 transitions. [2021-12-06 22:39:36,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 22:39:36,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:39:36,898 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:36,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 22:39:37,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 22:39:37,099 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:39:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:37,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1391523388, now seen corresponding path program 1 times [2021-12-06 22:39:37,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:37,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530469918] [2021-12-06 22:39:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:37,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:39:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:39:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:39:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:39:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:39:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:39:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:39:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:39:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 22:39:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:39:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:39:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:39:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-06 22:39:37,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:37,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530469918] [2021-12-06 22:39:37,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530469918] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:37,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008780582] [2021-12-06 22:39:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:37,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:37,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:37,332 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:37,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 22:39:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:37,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 22:39:37,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:43,790 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:39:49,832 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:39:55,881 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:40:01,934 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:40:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 22:40:02,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:40:02,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008780582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:40:02,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:40:02,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [10] total 20 [2021-12-06 22:40:02,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359255258] [2021-12-06 22:40:02,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:40:02,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 22:40:02,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 22:40:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:40:02,030 INFO L87 Difference]: Start difference. First operand 420 states and 550 transitions. Second operand has 18 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 22:40:08,273 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:40:14,310 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:40:14,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:40:14,496 INFO L93 Difference]: Finished difference Result 745 states and 999 transitions. [2021-12-06 22:40:14,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:40:14,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 121 [2021-12-06 22:40:14,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:40:14,498 INFO L225 Difference]: With dead ends: 745 [2021-12-06 22:40:14,499 INFO L226 Difference]: Without dead ends: 434 [2021-12-06 22:40:14,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-12-06 22:40:14,500 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 29 mSDsluCounter, 4779 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 5101 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:40:14,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 5101 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 442 Invalid, 0 Unknown, 391 Unchecked, 0.2s Time] [2021-12-06 22:40:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-12-06 22:40:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 418. [2021-12-06 22:40:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 286 states have (on average 1.1433566433566433) internal successors, (327), 292 states have internal predecessors, (327), 97 states have call successors, (97), 31 states have call predecessors, (97), 34 states have return successors, (126), 94 states have call predecessors, (126), 96 states have call successors, (126) [2021-12-06 22:40:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 550 transitions. [2021-12-06 22:40:14,523 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 550 transitions. Word has length 121 [2021-12-06 22:40:14,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:40:14,523 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 550 transitions. [2021-12-06 22:40:14,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 22:40:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 550 transitions. [2021-12-06 22:40:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 22:40:14,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:40:14,524 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:14,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 22:40:14,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 22:40:14,726 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:40:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:14,727 INFO L85 PathProgramCache]: Analyzing trace with hash 862515409, now seen corresponding path program 1 times [2021-12-06 22:40:14,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:14,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321228997] [2021-12-06 22:40:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:14,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:40:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:40:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:40:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:40:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:40:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:40:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:40:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:40:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 22:40:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:40:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:40:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 22:40:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 22:40:14,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:14,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321228997] [2021-12-06 22:40:14,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321228997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:40:14,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:40:14,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 22:40:14,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588763041] [2021-12-06 22:40:14,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:40:14,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:40:14,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:40:14,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:40:14,977 INFO L87 Difference]: Start difference. First operand 418 states and 550 transitions. Second operand has 10 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:40:15,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:40:15,387 INFO L93 Difference]: Finished difference Result 716 states and 955 transitions. [2021-12-06 22:40:15,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:40:15,387 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 123 [2021-12-06 22:40:15,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:40:15,389 INFO L225 Difference]: With dead ends: 716 [2021-12-06 22:40:15,389 INFO L226 Difference]: Without dead ends: 430 [2021-12-06 22:40:15,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:40:15,391 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 105 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:40:15,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 1966 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:40:15,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-12-06 22:40:15,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 418. [2021-12-06 22:40:15,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 286 states have (on average 1.1433566433566433) internal successors, (327), 292 states have internal predecessors, (327), 97 states have call successors, (97), 31 states have call predecessors, (97), 34 states have return successors, (124), 94 states have call predecessors, (124), 96 states have call successors, (124) [2021-12-06 22:40:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 548 transitions. [2021-12-06 22:40:15,412 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 548 transitions. Word has length 123 [2021-12-06 22:40:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:40:15,413 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 548 transitions. [2021-12-06 22:40:15,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:40:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 548 transitions. [2021-12-06 22:40:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-06 22:40:15,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:40:15,414 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:15,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 22:40:15,414 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:40:15,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:15,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1506302913, now seen corresponding path program 1 times [2021-12-06 22:40:15,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:15,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854055515] [2021-12-06 22:40:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:15,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:15,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:40:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:15,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:40:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:15,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:40:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:15,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:40:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:15,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:40:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:15,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:40:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:15,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:40:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:15,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:40:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:15,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:40:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:15,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:40:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:15,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:40:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:16,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:40:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:16,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:40:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:16,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:40:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:16,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:40:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 22:40:16,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:16,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854055515] [2021-12-06 22:40:16,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854055515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:40:16,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:40:16,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:40:16,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586507045] [2021-12-06 22:40:16,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:40:16,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:40:16,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:16,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:40:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:40:16,046 INFO L87 Difference]: Start difference. First operand 418 states and 548 transitions. Second operand has 19 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 9 states have call successors, (15) [2021-12-06 22:40:18,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:40:18,205 INFO L93 Difference]: Finished difference Result 614 states and 856 transitions. [2021-12-06 22:40:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 22:40:18,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 9 states have call successors, (15) Word has length 128 [2021-12-06 22:40:18,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:40:18,208 INFO L225 Difference]: With dead ends: 614 [2021-12-06 22:40:18,208 INFO L226 Difference]: Without dead ends: 608 [2021-12-06 22:40:18,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 22:40:18,209 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 430 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 4048 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 2236 SdHoareTripleChecker+Invalid, 4469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 4048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 22:40:18,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 2236 Invalid, 4469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 4048 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 22:40:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-12-06 22:40:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 483. [2021-12-06 22:40:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 335 states have (on average 1.1432835820895522) internal successors, (383), 342 states have internal predecessors, (383), 109 states have call successors, (109), 33 states have call predecessors, (109), 38 states have return successors, (148), 107 states have call predecessors, (148), 108 states have call successors, (148) [2021-12-06 22:40:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 640 transitions. [2021-12-06 22:40:18,239 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 640 transitions. Word has length 128 [2021-12-06 22:40:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:40:18,239 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 640 transitions. [2021-12-06 22:40:18,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 9 states have call successors, (15) [2021-12-06 22:40:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 640 transitions. [2021-12-06 22:40:18,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 22:40:18,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:40:18,241 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:18,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 22:40:18,241 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:40:18,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:18,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1465929288, now seen corresponding path program 1 times [2021-12-06 22:40:18,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:18,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398644016] [2021-12-06 22:40:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:18,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:40:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:40:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:40:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:40:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:40:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:40:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:40:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:40:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 22:40:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:40:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:40:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-06 22:40:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 22:40:18,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:18,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398644016] [2021-12-06 22:40:18,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398644016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:40:18,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935799938] [2021-12-06 22:40:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:18,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:18,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:40:18,622 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:40:18,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 22:40:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 2684 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 22:40:18,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:40:18,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:40:18,989 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 11 treesize of output 7 [2021-12-06 22:40:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 22:40:19,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:40:19,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935799938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:40:19,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:40:19,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 18 [2021-12-06 22:40:19,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194970152] [2021-12-06 22:40:19,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:40:19,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 22:40:19,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:19,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 22:40:19,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:40:19,584 INFO L87 Difference]: Start difference. First operand 483 states and 640 transitions. Second operand has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 5 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-06 22:40:19,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:40:19,833 INFO L93 Difference]: Finished difference Result 1087 states and 1497 transitions. [2021-12-06 22:40:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:40:19,833 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 5 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 125 [2021-12-06 22:40:19,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:40:19,837 INFO L225 Difference]: With dead ends: 1087 [2021-12-06 22:40:19,837 INFO L226 Difference]: Without dead ends: 728 [2021-12-06 22:40:19,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:40:19,839 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 83 mSDsluCounter, 2888 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 3367 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:40:19,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 3367 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 192 Unchecked, 0.2s Time] [2021-12-06 22:40:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-12-06 22:40:19,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 581. [2021-12-06 22:40:19,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 411 states have (on average 1.121654501216545) internal successors, (461), 424 states have internal predecessors, (461), 121 states have call successors, (121), 38 states have call predecessors, (121), 48 states have return successors, (167), 118 states have call predecessors, (167), 120 states have call successors, (167) [2021-12-06 22:40:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 749 transitions. [2021-12-06 22:40:19,873 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 749 transitions. Word has length 125 [2021-12-06 22:40:19,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:40:19,874 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 749 transitions. [2021-12-06 22:40:19,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 5 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-06 22:40:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 749 transitions. [2021-12-06 22:40:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 22:40:19,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:40:19,875 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:19,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 22:40:20,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:20,077 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:40:20,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:20,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1403889674, now seen corresponding path program 1 times [2021-12-06 22:40:20,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:20,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890486744] [2021-12-06 22:40:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:20,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:40:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:40:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:40:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:40:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:40:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:40:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:40:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:40:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 22:40:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:40:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:40:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-06 22:40:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 22:40:20,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:20,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890486744] [2021-12-06 22:40:20,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890486744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:40:20,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:40:20,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:40:20,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697000546] [2021-12-06 22:40:20,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:40:20,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:40:20,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:20,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:40:20,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:40:20,245 INFO L87 Difference]: Start difference. First operand 581 states and 749 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:40:20,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:40:20,536 INFO L93 Difference]: Finished difference Result 1000 states and 1322 transitions. [2021-12-06 22:40:20,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:40:20,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 125 [2021-12-06 22:40:20,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:40:20,540 INFO L225 Difference]: With dead ends: 1000 [2021-12-06 22:40:20,540 INFO L226 Difference]: Without dead ends: 589 [2021-12-06 22:40:20,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:40:20,541 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 100 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:40:20,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 846 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:40:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-12-06 22:40:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 574. [2021-12-06 22:40:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 405 states have (on average 1.1209876543209876) internal successors, (454), 417 states have internal predecessors, (454), 121 states have call successors, (121), 38 states have call predecessors, (121), 47 states have return successors, (162), 118 states have call predecessors, (162), 120 states have call successors, (162) [2021-12-06 22:40:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 737 transitions. [2021-12-06 22:40:20,572 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 737 transitions. Word has length 125 [2021-12-06 22:40:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:40:20,572 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 737 transitions. [2021-12-06 22:40:20,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 22:40:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 737 transitions. [2021-12-06 22:40:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-06 22:40:20,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:40:20,574 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, 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] [2021-12-06 22:40:20,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 22:40:20,574 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:40:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:20,574 INFO L85 PathProgramCache]: Analyzing trace with hash -984995464, now seen corresponding path program 1 times [2021-12-06 22:40:20,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:20,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73006685] [2021-12-06 22:40:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:20,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:40:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:40:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:40:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:40:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:40:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:40:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:40:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:40:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:40:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:40:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:40:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:40:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:20,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 22:40:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 22:40:21,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:21,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73006685] [2021-12-06 22:40:21,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73006685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:40:21,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484194531] [2021-12-06 22:40:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:21,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:21,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:40:21,001 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:40:21,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 22:40:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:21,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 2693 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 22:40:21,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:40:21,343 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 [2021-12-06 22:40:21,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:40:21,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:40:21,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:40:21,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:40:21,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-12-06 22:40:22,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:40:22,806 INFO L354 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2021-12-06 22:40:22,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 45 [2021-12-06 22:40:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 22 proven. 44 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 22:40:23,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:40:25,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484194531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:40:25,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:40:25,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 33 [2021-12-06 22:40:25,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794091306] [2021-12-06 22:40:25,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:40:25,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 22:40:25,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 22:40:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1490, Unknown=1, NotChecked=0, Total=1640 [2021-12-06 22:40:25,580 INFO L87 Difference]: Start difference. First operand 574 states and 737 transitions. Second operand has 33 states, 31 states have (on average 5.064516129032258) internal successors, (157), 30 states have internal predecessors, (157), 11 states have call successors, (26), 5 states have call predecessors, (26), 6 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25) [2021-12-06 22:41:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:41:54,530 INFO L93 Difference]: Finished difference Result 1325 states and 1937 transitions. [2021-12-06 22:41:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 22:41:54,531 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 5.064516129032258) internal successors, (157), 30 states have internal predecessors, (157), 11 states have call successors, (26), 5 states have call predecessors, (26), 6 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25) Word has length 130 [2021-12-06 22:41:54,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:41:54,537 INFO L225 Difference]: With dead ends: 1325 [2021-12-06 22:41:54,537 INFO L226 Difference]: Without dead ends: 1192 [2021-12-06 22:41:54,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 209 SyntacticMatches, 18 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 89.2s TimeCoverageRelationStatistics Valid=758, Invalid=7027, Unknown=47, NotChecked=0, Total=7832 [2021-12-06 22:41:54,540 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 562 mSDsluCounter, 5079 mSDsCounter, 0 mSdLazyCounter, 5052 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 5610 SdHoareTripleChecker+Invalid, 7234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 5052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1863 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:41:54,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 5610 Invalid, 7234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 5052 Invalid, 0 Unknown, 1863 Unchecked, 3.0s Time] [2021-12-06 22:41:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-12-06 22:41:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 704. [2021-12-06 22:41:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 511 states have (on average 1.1193737769080234) internal successors, (572), 526 states have internal predecessors, (572), 134 states have call successors, (134), 46 states have call predecessors, (134), 58 states have return successors, (188), 131 states have call predecessors, (188), 133 states have call successors, (188) [2021-12-06 22:41:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 894 transitions. [2021-12-06 22:41:54,600 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 894 transitions. Word has length 130 [2021-12-06 22:41:54,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:41:54,600 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 894 transitions. [2021-12-06 22:41:54,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 5.064516129032258) internal successors, (157), 30 states have internal predecessors, (157), 11 states have call successors, (26), 5 states have call predecessors, (26), 6 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25) [2021-12-06 22:41:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 894 transitions. [2021-12-06 22:41:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-06 22:41:54,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:41:54,602 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:41:54,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 22:41:54,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:41:54,803 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:41:54,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:41:54,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2030108154, now seen corresponding path program 1 times [2021-12-06 22:41:54,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:41:54,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233188802] [2021-12-06 22:41:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:41:54,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:41:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:41:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:41:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:41:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:41:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:41:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:41:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:41:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:41:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:41:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:41:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:41:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:41:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 22:41:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-06 22:41:55,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:41:55,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233188802] [2021-12-06 22:41:55,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233188802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:41:55,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:41:55,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 22:41:55,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912285519] [2021-12-06 22:41:55,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:41:55,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 22:41:55,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:41:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 22:41:55,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:41:55,235 INFO L87 Difference]: Start difference. First operand 704 states and 894 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 8 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 22:41:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:41:56,231 INFO L93 Difference]: Finished difference Result 1193 states and 1643 transitions. [2021-12-06 22:41:56,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:41:56,232 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 8 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 130 [2021-12-06 22:41:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:41:56,236 INFO L225 Difference]: With dead ends: 1193 [2021-12-06 22:41:56,236 INFO L226 Difference]: Without dead ends: 886 [2021-12-06 22:41:56,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:41:56,238 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 212 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 22:41:56,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1203 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 22:41:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-12-06 22:41:56,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 777. [2021-12-06 22:41:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 542 states have (on average 1.1162361623616237) internal successors, (605), 556 states have internal predecessors, (605), 176 states have call successors, (176), 46 states have call predecessors, (176), 58 states have return successors, (242), 174 states have call predecessors, (242), 175 states have call successors, (242) [2021-12-06 22:41:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1023 transitions. [2021-12-06 22:41:56,292 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1023 transitions. Word has length 130 [2021-12-06 22:41:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:41:56,292 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1023 transitions. [2021-12-06 22:41:56,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 8 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 22:41:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1023 transitions. [2021-12-06 22:41:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 22:41:56,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:41:56,295 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:41:56,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 22:41:56,296 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:41:56,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:41:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1934158320, now seen corresponding path program 1 times [2021-12-06 22:41:56,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:41:56,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481004045] [2021-12-06 22:41:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:41:56,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:41:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:41:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:41:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:41:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:41:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:41:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:41:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:41:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:41:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:41:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:41:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:41:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:41:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:41:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:41:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 22:41:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 22:41:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-06 22:41:56,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:41:56,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481004045] [2021-12-06 22:41:56,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481004045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:41:56,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:41:56,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 22:41:56,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892992714] [2021-12-06 22:41:56,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:41:56,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 22:41:56,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:41:56,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 22:41:56,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:41:56,658 INFO L87 Difference]: Start difference. First operand 777 states and 1023 transitions. Second operand has 12 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 6 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-06 22:41:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:41:57,678 INFO L93 Difference]: Finished difference Result 1057 states and 1397 transitions. [2021-12-06 22:41:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:41:57,679 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 6 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 136 [2021-12-06 22:41:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:41:57,683 INFO L225 Difference]: With dead ends: 1057 [2021-12-06 22:41:57,683 INFO L226 Difference]: Without dead ends: 928 [2021-12-06 22:41:57,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:41:57,684 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 370 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 1643 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 2008 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 22:41:57,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 2008 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1643 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 22:41:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-12-06 22:41:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 860. [2021-12-06 22:41:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 596 states have (on average 1.1208053691275168) internal successors, (668), 608 states have internal predecessors, (668), 201 states have call successors, (201), 49 states have call predecessors, (201), 62 states have return successors, (280), 202 states have call predecessors, (280), 200 states have call successors, (280) [2021-12-06 22:41:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1149 transitions. [2021-12-06 22:41:57,743 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1149 transitions. Word has length 136 [2021-12-06 22:41:57,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:41:57,743 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1149 transitions. [2021-12-06 22:41:57,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 6 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-06 22:41:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1149 transitions. [2021-12-06 22:41:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 22:41:57,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:41:57,746 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:41:57,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 22:41:57,746 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:41:57,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:41:57,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2135982254, now seen corresponding path program 1 times [2021-12-06 22:41:57,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:41:57,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874517441] [2021-12-06 22:41:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:41:57,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:41:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:41:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:41:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:41:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:41:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:41:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:41:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:41:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:41:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:41:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:41:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:41:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:41:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:41:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:41:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 22:41:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 22:41:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-06 22:41:58,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:41:58,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874517441] [2021-12-06 22:41:58,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874517441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:41:58,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:41:58,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-06 22:41:58,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81524284] [2021-12-06 22:41:58,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:41:58,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:41:58,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:41:58,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:41:58,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:41:58,877 INFO L87 Difference]: Start difference. First operand 860 states and 1149 transitions. Second operand has 17 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 9 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2021-12-06 22:42:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:42:00,372 INFO L93 Difference]: Finished difference Result 978 states and 1361 transitions. [2021-12-06 22:42:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:42:00,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 9 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 136 [2021-12-06 22:42:00,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:42:00,378 INFO L225 Difference]: With dead ends: 978 [2021-12-06 22:42:00,378 INFO L226 Difference]: Without dead ends: 976 [2021-12-06 22:42:00,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-12-06 22:42:00,379 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 363 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 3376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:42:00,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 2090 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 3021 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 22:42:00,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-12-06 22:42:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 864. [2021-12-06 22:42:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 599 states have (on average 1.1202003338898163) internal successors, (671), 611 states have internal predecessors, (671), 201 states have call successors, (201), 50 states have call predecessors, (201), 63 states have return successors, (280), 202 states have call predecessors, (280), 200 states have call successors, (280) [2021-12-06 22:42:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1152 transitions. [2021-12-06 22:42:00,440 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1152 transitions. Word has length 136 [2021-12-06 22:42:00,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:42:00,440 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1152 transitions. [2021-12-06 22:42:00,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 9 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2021-12-06 22:42:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1152 transitions. [2021-12-06 22:42:00,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 22:42:00,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:42:00,443 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:42:00,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 22:42:00,443 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:42:00,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:42:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1127341084, now seen corresponding path program 1 times [2021-12-06 22:42:00,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:42:00,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267022768] [2021-12-06 22:42:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:42:00,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:42:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:42:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:42:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:42:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:42:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 22:42:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:42:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:42:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 22:42:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 22:42:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 22:42:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 22:42:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:42:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 22:42:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:42:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 22:42:01,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:42:01,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267022768] [2021-12-06 22:42:01,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267022768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:42:01,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951161180] [2021-12-06 22:42:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:42:01,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:42:01,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:42:01,432 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:42:01,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 22:42:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:01,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 2701 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-06 22:42:01,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:42:01,772 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 [2021-12-06 22:42:02,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:42:02,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:42:02,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:42:02,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:42:02,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2021-12-06 22:42:03,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:42:03,358 INFO L354 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2021-12-06 22:42:03,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 52 [2021-12-06 22:42:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 22 proven. 44 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 22:42:05,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:42:08,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951161180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:42:08,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:42:08,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 32 [2021-12-06 22:42:08,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609100594] [2021-12-06 22:42:08,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:42:08,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 22:42:08,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:42:08,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 22:42:08,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1321, Unknown=2, NotChecked=0, Total=1482 [2021-12-06 22:42:08,220 INFO L87 Difference]: Start difference. First operand 864 states and 1152 transitions. Second operand has 32 states, 29 states have (on average 5.379310344827586) internal successors, (156), 29 states have internal predecessors, (156), 13 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (27), 10 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-06 22:42:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:42:37,494 INFO L93 Difference]: Finished difference Result 1931 states and 2662 transitions. [2021-12-06 22:42:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 22:42:37,495 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 5.379310344827586) internal successors, (156), 29 states have internal predecessors, (156), 13 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (27), 10 states have call predecessors, (27), 12 states have call successors, (27) Word has length 135 [2021-12-06 22:42:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:42:37,503 INFO L225 Difference]: With dead ends: 1931 [2021-12-06 22:42:37,503 INFO L226 Difference]: Without dead ends: 1776 [2021-12-06 22:42:37,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 218 SyntacticMatches, 18 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=608, Invalid=5383, Unknown=15, NotChecked=0, Total=6006 [2021-12-06 22:42:37,506 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 1081 mSDsluCounter, 3647 mSDsCounter, 0 mSdLazyCounter, 4942 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 4151 SdHoareTripleChecker+Invalid, 7672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 4942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1976 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:42:37,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1171 Valid, 4151 Invalid, 7672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 4942 Invalid, 0 Unknown, 1976 Unchecked, 3.2s Time] [2021-12-06 22:42:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-12-06 22:42:37,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1494. [2021-12-06 22:42:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1031 states have (on average 1.122211445198836) internal successors, (1157), 1049 states have internal predecessors, (1157), 354 states have call successors, (354), 87 states have call predecessors, (354), 108 states have return successors, (488), 357 states have call predecessors, (488), 352 states have call successors, (488) [2021-12-06 22:42:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1999 transitions. [2021-12-06 22:42:37,619 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1999 transitions. Word has length 135 [2021-12-06 22:42:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:42:37,619 INFO L470 AbstractCegarLoop]: Abstraction has 1494 states and 1999 transitions. [2021-12-06 22:42:37,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 5.379310344827586) internal successors, (156), 29 states have internal predecessors, (156), 13 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (27), 10 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-06 22:42:37,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1999 transitions. [2021-12-06 22:42:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 22:42:37,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:42:37,623 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:42:37,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 22:42:37,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 22:42:37,824 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:42:37,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:42:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1321112872, now seen corresponding path program 1 times [2021-12-06 22:42:37,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:42:37,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828289228] [2021-12-06 22:42:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:42:37,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:42:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:42:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:42:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:42:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:42:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 22:42:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:42:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:42:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 22:42:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 22:42:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 22:42:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 22:42:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:42:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 22:42:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:42:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 22:42:38,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:42:38,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828289228] [2021-12-06 22:42:38,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828289228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:42:38,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893409442] [2021-12-06 22:42:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:42:38,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:42:38,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:42:38,941 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:42:38,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 22:42:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:40,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 22:42:40,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:42:40,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:42:40,803 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 22:42:40,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 22:42:40,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:42:41,387 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-06 22:42:41,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 22:42:45,578 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 24 [2021-12-06 22:43:10,668 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-12-06 22:43:10,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 67 [2021-12-06 22:43:31,648 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:43:37,951 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:43:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 31 proven. 47 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 22:43:52,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:43:53,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893409442] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:53,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:43:53,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 42 [2021-12-06 22:43:53,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950908754] [2021-12-06 22:43:53,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:43:53,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 22:43:53,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:53,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 22:43:53,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2237, Unknown=8, NotChecked=0, Total=2450 [2021-12-06 22:43:53,067 INFO L87 Difference]: Start difference. First operand 1494 states and 1999 transitions. Second operand has 42 states, 39 states have (on average 4.0) internal successors, (156), 39 states have internal predecessors, (156), 14 states have call successors, (28), 8 states have call predecessors, (28), 10 states have return successors, (27), 11 states have call predecessors, (27), 13 states have call successors, (27) [2021-12-06 22:44:38,618 WARN L227 SmtUtils]: Spent 32.72s on a formula simplification. DAG size of input: 55 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:44:44,751 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:44:51,569 WARN L227 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 89 DAG size of output: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:45:01,854 WARN L227 SmtUtils]: Spent 10.19s on a formula simplification. DAG size of input: 78 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:45:12,744 WARN L227 SmtUtils]: Spent 10.61s on a formula simplification. DAG size of input: 97 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:45:22,675 WARN L227 SmtUtils]: Spent 9.76s on a formula simplification. DAG size of input: 83 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:45:32,242 WARN L227 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 90 DAG size of output: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:45:38,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:38,244 INFO L93 Difference]: Finished difference Result 2009 states and 2671 transitions. [2021-12-06 22:45:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-06 22:45:38,244 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 4.0) internal successors, (156), 39 states have internal predecessors, (156), 14 states have call successors, (28), 8 states have call predecessors, (28), 10 states have return successors, (27), 11 states have call predecessors, (27), 13 states have call successors, (27) Word has length 135 [2021-12-06 22:45:38,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:38,252 INFO L225 Difference]: With dead ends: 2009 [2021-12-06 22:45:38,252 INFO L226 Difference]: Without dead ends: 1738 [2021-12-06 22:45:38,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 166 SyntacticMatches, 21 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 173.1s TimeCoverageRelationStatistics Valid=754, Invalid=8163, Unknown=13, NotChecked=0, Total=8930 [2021-12-06 22:45:38,256 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 292 mSDsluCounter, 3849 mSDsCounter, 0 mSdLazyCounter, 2703 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 4196 SdHoareTripleChecker+Invalid, 4858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2045 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:38,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 4196 Invalid, 4858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2703 Invalid, 0 Unknown, 2045 Unchecked, 1.7s Time] [2021-12-06 22:45:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-12-06 22:45:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1570. [2021-12-06 22:45:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1097 states have (on average 1.1194165907019142) internal successors, (1228), 1119 states have internal predecessors, (1228), 354 states have call successors, (354), 93 states have call predecessors, (354), 118 states have return successors, (477), 357 states have call predecessors, (477), 352 states have call successors, (477) [2021-12-06 22:45:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 2059 transitions. [2021-12-06 22:45:38,376 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 2059 transitions. Word has length 135 [2021-12-06 22:45:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:38,376 INFO L470 AbstractCegarLoop]: Abstraction has 1570 states and 2059 transitions. [2021-12-06 22:45:38,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 4.0) internal successors, (156), 39 states have internal predecessors, (156), 14 states have call successors, (28), 8 states have call predecessors, (28), 10 states have return successors, (27), 11 states have call predecessors, (27), 13 states have call successors, (27) [2021-12-06 22:45:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 2059 transitions. [2021-12-06 22:45:38,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 22:45:38,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:38,380 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, 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] [2021-12-06 22:45:38,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 22:45:38,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 22:45:38,581 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:38,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:38,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1579278310, now seen corresponding path program 1 times [2021-12-06 22:45:38,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:38,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957124469] [2021-12-06 22:45:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:38,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:45:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:45:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:45:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 22:45:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:45:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:45:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 22:45:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 22:45:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 22:45:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 22:45:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:45:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 22:45:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:45:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-06 22:45:38,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:38,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957124469] [2021-12-06 22:45:38,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957124469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:38,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:38,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:45:38,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859877000] [2021-12-06 22:45:38,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:38,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:45:38,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:45:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:45:38,801 INFO L87 Difference]: Start difference. First operand 1570 states and 2059 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-06 22:45:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:39,239 INFO L93 Difference]: Finished difference Result 1942 states and 2556 transitions. [2021-12-06 22:45:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:45:39,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 135 [2021-12-06 22:45:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:39,250 INFO L225 Difference]: With dead ends: 1942 [2021-12-06 22:45:39,250 INFO L226 Difference]: Without dead ends: 1626 [2021-12-06 22:45:39,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:45:39,253 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 129 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:39,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 816 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:45:39,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-12-06 22:45:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1556. [2021-12-06 22:45:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1085 states have (on average 1.112442396313364) internal successors, (1207), 1105 states have internal predecessors, (1207), 354 states have call successors, (354), 93 states have call predecessors, (354), 116 states have return successors, (460), 357 states have call predecessors, (460), 352 states have call successors, (460) [2021-12-06 22:45:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 2021 transitions. [2021-12-06 22:45:39,380 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 2021 transitions. Word has length 135 [2021-12-06 22:45:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:39,380 INFO L470 AbstractCegarLoop]: Abstraction has 1556 states and 2021 transitions. [2021-12-06 22:45:39,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-06 22:45:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 2021 transitions. [2021-12-06 22:45:39,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-06 22:45:39,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:39,384 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:39,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 22:45:39,384 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:39,384 INFO L85 PathProgramCache]: Analyzing trace with hash -591306961, now seen corresponding path program 1 times [2021-12-06 22:45:39,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:39,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610026278] [2021-12-06 22:45:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:39,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:45:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:45:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:45:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 22:45:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:45:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:45:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 22:45:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 22:45:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 22:45:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 22:45:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:45:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 22:45:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:45:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-06 22:45:39,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:39,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610026278] [2021-12-06 22:45:39,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610026278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:39,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:39,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 22:45:39,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945752900] [2021-12-06 22:45:39,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:39,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:45:39,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:39,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:45:39,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:45:39,974 INFO L87 Difference]: Start difference. First operand 1556 states and 2021 transitions. Second operand has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 16 states have internal predecessors, (72), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-06 22:45:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:41,977 INFO L93 Difference]: Finished difference Result 1788 states and 2410 transitions. [2021-12-06 22:45:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 22:45:41,977 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 16 states have internal predecessors, (72), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) Word has length 137 [2021-12-06 22:45:41,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:41,985 INFO L225 Difference]: With dead ends: 1788 [2021-12-06 22:45:41,985 INFO L226 Difference]: Without dead ends: 1786 [2021-12-06 22:45:41,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 22:45:41,987 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 411 mSDsluCounter, 2017 mSDsCounter, 0 mSdLazyCounter, 3472 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 3854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 3472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:41,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 2267 Invalid, 3854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 3472 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 22:45:41,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-12-06 22:45:42,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1564. [2021-12-06 22:45:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1091 states have (on average 1.1118240146654446) internal successors, (1213), 1111 states have internal predecessors, (1213), 354 states have call successors, (354), 95 states have call predecessors, (354), 118 states have return successors, (460), 357 states have call predecessors, (460), 352 states have call successors, (460) [2021-12-06 22:45:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2027 transitions. [2021-12-06 22:45:42,111 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2027 transitions. Word has length 137 [2021-12-06 22:45:42,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:42,111 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 2027 transitions. [2021-12-06 22:45:42,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 16 states have internal predecessors, (72), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-06 22:45:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2027 transitions. [2021-12-06 22:45:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 22:45:42,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:42,114 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:42,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 22:45:42,115 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:42,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:42,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1221124017, now seen corresponding path program 1 times [2021-12-06 22:45:42,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:42,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785787644] [2021-12-06 22:45:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:42,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:45:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:45:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:45:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 22:45:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:45:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:45:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 22:45:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 22:45:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:45:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:45:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:45:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:45:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 22:45:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-06 22:45:42,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:42,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785787644] [2021-12-06 22:45:42,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785787644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:42,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:42,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 22:45:42,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089894908] [2021-12-06 22:45:42,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:42,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 22:45:42,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 22:45:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:45:42,755 INFO L87 Difference]: Start difference. First operand 1564 states and 2027 transitions. Second operand has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 9 states have internal predecessors, (64), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 22:45:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:43,610 INFO L93 Difference]: Finished difference Result 1710 states and 2226 transitions. [2021-12-06 22:45:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 22:45:43,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 9 states have internal predecessors, (64), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 141 [2021-12-06 22:45:43,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:43,618 INFO L225 Difference]: With dead ends: 1710 [2021-12-06 22:45:43,618 INFO L226 Difference]: Without dead ends: 1708 [2021-12-06 22:45:43,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:45:43,619 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 207 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:43,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 1982 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:45:43,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2021-12-06 22:45:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1572. [2021-12-06 22:45:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1097 states have (on average 1.1112123974475843) internal successors, (1219), 1117 states have internal predecessors, (1219), 354 states have call successors, (354), 97 states have call predecessors, (354), 120 states have return successors, (460), 357 states have call predecessors, (460), 352 states have call successors, (460) [2021-12-06 22:45:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2033 transitions. [2021-12-06 22:45:43,733 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2033 transitions. Word has length 141 [2021-12-06 22:45:43,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:43,733 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 2033 transitions. [2021-12-06 22:45:43,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 9 states have internal predecessors, (64), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 22:45:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2033 transitions. [2021-12-06 22:45:43,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 22:45:43,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:43,736 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:43,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 22:45:43,736 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:43,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1996907536, now seen corresponding path program 1 times [2021-12-06 22:45:43,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:43,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327110134] [2021-12-06 22:45:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:43,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:45:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:45:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:45:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 22:45:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:45:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:45:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 22:45:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 22:45:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:45:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:45:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:45:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:45:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 22:45:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-06 22:45:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-06 22:45:44,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:44,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327110134] [2021-12-06 22:45:44,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327110134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:44,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610664565] [2021-12-06 22:45:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:44,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:44,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:45:44,543 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:45:44,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 22:45:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:44,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 22:45:44,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:45:44,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:45:44,956 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-06 22:45:44,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2021-12-06 22:45:44,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:45:45,231 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-06 22:45:45,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 22:45:52,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 22:46:43,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-06 22:46:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 38 proven. 43 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 22:46:44,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:44,691 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1875 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_1875) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset| 8)) 0))) is different from false [2021-12-06 22:46:44,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610664565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:44,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:46:44,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 28] total 36 [2021-12-06 22:46:44,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568220326] [2021-12-06 22:46:44,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:44,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 22:46:44,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:44,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 22:46:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1578, Unknown=3, NotChecked=80, Total=1806 [2021-12-06 22:46:44,700 INFO L87 Difference]: Start difference. First operand 1572 states and 2033 transitions. Second operand has 36 states, 33 states have (on average 4.9393939393939394) internal successors, (163), 30 states have internal predecessors, (163), 16 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (31), 15 states have call predecessors, (31), 14 states have call successors, (31) [2021-12-06 22:46:50,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:50,205 INFO L93 Difference]: Finished difference Result 1868 states and 2404 transitions. [2021-12-06 22:46:50,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 22:46:50,205 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 4.9393939393939394) internal successors, (163), 30 states have internal predecessors, (163), 16 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (31), 15 states have call predecessors, (31), 14 states have call successors, (31) Word has length 147 [2021-12-06 22:46:50,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:50,213 INFO L225 Difference]: With dead ends: 1868 [2021-12-06 22:46:50,213 INFO L226 Difference]: Without dead ends: 1844 [2021-12-06 22:46:50,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 216 SyntacticMatches, 23 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 63.4s TimeCoverageRelationStatistics Valid=277, Invalid=2916, Unknown=3, NotChecked=110, Total=3306 [2021-12-06 22:46:50,215 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 210 mSDsluCounter, 3601 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 3957 SdHoareTripleChecker+Invalid, 4063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1968 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:50,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 3957 Invalid, 4063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1967 Invalid, 0 Unknown, 1968 Unchecked, 1.0s Time] [2021-12-06 22:46:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-06 22:46:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1678. [2021-12-06 22:46:50,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1181 states have (on average 1.1083827265029635) internal successors, (1309), 1195 states have internal predecessors, (1309), 360 states have call successors, (360), 119 states have call predecessors, (360), 136 states have return successors, (466), 363 states have call predecessors, (466), 358 states have call successors, (466) [2021-12-06 22:46:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2135 transitions. [2021-12-06 22:46:50,342 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2135 transitions. Word has length 147 [2021-12-06 22:46:50,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:50,342 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 2135 transitions. [2021-12-06 22:46:50,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 4.9393939393939394) internal successors, (163), 30 states have internal predecessors, (163), 16 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (31), 15 states have call predecessors, (31), 14 states have call successors, (31) [2021-12-06 22:46:50,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2135 transitions. [2021-12-06 22:46:50,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 22:46:50,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:50,346 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:50,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 22:46:50,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:50,547 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:46:50,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:50,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1621475623, now seen corresponding path program 1 times [2021-12-06 22:46:50,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:50,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006483248] [2021-12-06 22:46:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:50,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:46:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:46:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:46:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:46:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:46:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:46:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:46:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:46:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:46:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:46:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:46:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:46:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:46:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:46:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:46:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:46:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 22:46:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-06 22:46:50,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:50,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006483248] [2021-12-06 22:46:50,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006483248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:50,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354389242] [2021-12-06 22:46:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:50,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:50,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:50,978 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:50,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 22:46:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:51,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 2755 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-06 22:46:51,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:51,363 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 [2021-12-06 22:46:51,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:46:55,245 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 22:46:55,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 39 [2021-12-06 22:46:55,259 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 22:46:55,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-06 22:46:55,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-06 22:46:55,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-06 22:47:10,661 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_68| Int)) (let ((.cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_68|) 0)) (.cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_68|) 8))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_3|) .cse0) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_3| 8)) .cse1) (not (= (mod .cse0 18446744073709551616) 0)) (not (= 0 .cse1))))) (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_3| Int)) (and (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_3| 8)) 0)) (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_3|) 18446744073709551616) 0))))) is different from true [2021-12-06 22:47:26,017 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 22:47:26,017 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 83 treesize of output 53 [2021-12-06 22:47:26,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-12-06 22:47:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 12 not checked. [2021-12-06 22:47:26,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:28,077 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1952 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_1952))) (let ((.cse0 (mod (select (select .cse1 |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset|) 18446744073709551616))) (or (not (= .cse0 (mod (select (select .cse1 |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset|) 18446744073709551616))) (and (< 0 .cse0) (forall ((v_ArrVal_1951 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_1951) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset| 8)) 0)))))))) is different from false [2021-12-06 22:47:28,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354389242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:28,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:47:28,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 27] total 39 [2021-12-06 22:47:28,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932284994] [2021-12-06 22:47:28,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:28,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 22:47:28,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:28,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 22:47:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2180, Unknown=6, NotChecked=190, Total=2550 [2021-12-06 22:47:28,116 INFO L87 Difference]: Start difference. First operand 1678 states and 2135 transitions. Second operand has 39 states, 34 states have (on average 5.5) internal successors, (187), 31 states have internal predecessors, (187), 13 states have call successors, (34), 9 states have call predecessors, (34), 12 states have return successors, (33), 10 states have call predecessors, (33), 13 states have call successors, (33) [2021-12-06 22:47:34,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:34,366 INFO L93 Difference]: Finished difference Result 2221 states and 2897 transitions. [2021-12-06 22:47:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 22:47:34,367 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 34 states have (on average 5.5) internal successors, (187), 31 states have internal predecessors, (187), 13 states have call successors, (34), 9 states have call predecessors, (34), 12 states have return successors, (33), 10 states have call predecessors, (33), 13 states have call successors, (33) Word has length 150 [2021-12-06 22:47:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:34,375 INFO L225 Difference]: With dead ends: 2221 [2021-12-06 22:47:34,375 INFO L226 Difference]: Without dead ends: 2055 [2021-12-06 22:47:34,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 248 SyntacticMatches, 20 SemanticMatches, 79 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=419, Invalid=5745, Unknown=6, NotChecked=310, Total=6480 [2021-12-06 22:47:34,378 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 418 mSDsluCounter, 6304 mSDsCounter, 0 mSdLazyCounter, 4441 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 6723 SdHoareTripleChecker+Invalid, 7612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 4441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2852 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:34,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 6723 Invalid, 7612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 4441 Invalid, 0 Unknown, 2852 Unchecked, 2.7s Time] [2021-12-06 22:47:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-12-06 22:47:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 1842. [2021-12-06 22:47:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1290 states have (on average 1.1046511627906976) internal successors, (1425), 1301 states have internal predecessors, (1425), 405 states have call successors, (405), 125 states have call predecessors, (405), 146 states have return successors, (545), 415 states have call predecessors, (545), 403 states have call successors, (545) [2021-12-06 22:47:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2375 transitions. [2021-12-06 22:47:34,521 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2375 transitions. Word has length 150 [2021-12-06 22:47:34,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:34,521 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2375 transitions. [2021-12-06 22:47:34,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 34 states have (on average 5.5) internal successors, (187), 31 states have internal predecessors, (187), 13 states have call successors, (34), 9 states have call predecessors, (34), 12 states have return successors, (33), 10 states have call predecessors, (33), 13 states have call successors, (33) [2021-12-06 22:47:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2375 transitions. [2021-12-06 22:47:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 22:47:34,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:34,525 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:34,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 22:47:34,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:34,725 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:47:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1786268827, now seen corresponding path program 1 times [2021-12-06 22:47:34,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:34,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799649096] [2021-12-06 22:47:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:34,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:34,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:47:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:34,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:47:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:47:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:47:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:47:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:47:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:47:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:47:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:47:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:47:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:47:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:47:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:47:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:47:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:47:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:47:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 22:47:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-06 22:47:35,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799649096] [2021-12-06 22:47:35,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799649096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000346899] [2021-12-06 22:47:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:35,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:35,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:35,279 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:35,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 22:47:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:35,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 22:47:35,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:35,655 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 [2021-12-06 22:47:42,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:47:42,351 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 [2021-12-06 22:47:42,363 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:47:42,364 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 17 treesize of output 23 [2021-12-06 22:47:42,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-06 22:47:46,617 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 16 treesize of output 8 [2021-12-06 22:47:46,623 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 22:47:46,623 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 19 [2021-12-06 22:47:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 69 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 22:47:46,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:53,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000346899] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:53,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:47:53,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 45 [2021-12-06 22:47:53,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21453836] [2021-12-06 22:47:53,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:53,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 22:47:53,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:53,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 22:47:53,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2990, Unknown=7, NotChecked=0, Total=3192 [2021-12-06 22:47:53,592 INFO L87 Difference]: Start difference. First operand 1842 states and 2375 transitions. Second operand has 45 states, 41 states have (on average 4.609756097560975) internal successors, (189), 37 states have internal predecessors, (189), 18 states have call successors, (35), 8 states have call predecessors, (35), 12 states have return successors, (34), 13 states have call predecessors, (34), 18 states have call successors, (34) [2021-12-06 22:48:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:48:03,599 INFO L93 Difference]: Finished difference Result 2095 states and 2681 transitions. [2021-12-06 22:48:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 22:48:03,599 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 4.609756097560975) internal successors, (189), 37 states have internal predecessors, (189), 18 states have call successors, (35), 8 states have call predecessors, (35), 12 states have return successors, (34), 13 states have call predecessors, (34), 18 states have call successors, (34) Word has length 150 [2021-12-06 22:48:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:48:03,607 INFO L225 Difference]: With dead ends: 2095 [2021-12-06 22:48:03,607 INFO L226 Difference]: Without dead ends: 1983 [2021-12-06 22:48:03,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 241 SyntacticMatches, 25 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2879 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=561, Invalid=7985, Unknown=10, NotChecked=0, Total=8556 [2021-12-06 22:48:03,609 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 430 mSDsluCounter, 5343 mSDsCounter, 0 mSdLazyCounter, 3521 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 5693 SdHoareTripleChecker+Invalid, 5011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 3521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1130 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 22:48:03,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 5693 Invalid, 5011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 3521 Invalid, 0 Unknown, 1130 Unchecked, 1.9s Time] [2021-12-06 22:48:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-12-06 22:48:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1856. [2021-12-06 22:48:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1303 states have (on average 1.103607060629317) internal successors, (1438), 1316 states have internal predecessors, (1438), 403 states have call successors, (403), 126 states have call predecessors, (403), 149 states have return successors, (546), 413 states have call predecessors, (546), 401 states have call successors, (546) [2021-12-06 22:48:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2387 transitions. [2021-12-06 22:48:03,750 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2387 transitions. Word has length 150 [2021-12-06 22:48:03,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:48:03,751 INFO L470 AbstractCegarLoop]: Abstraction has 1856 states and 2387 transitions. [2021-12-06 22:48:03,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 4.609756097560975) internal successors, (189), 37 states have internal predecessors, (189), 18 states have call successors, (35), 8 states have call predecessors, (35), 12 states have return successors, (34), 13 states have call predecessors, (34), 18 states have call successors, (34) [2021-12-06 22:48:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2387 transitions. [2021-12-06 22:48:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 22:48:03,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:48:03,754 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:48:03,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 22:48:03,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 22:48:03,955 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:48:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:48:03,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1619167015, now seen corresponding path program 1 times [2021-12-06 22:48:03,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:48:03,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225864919] [2021-12-06 22:48:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:03,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:48:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:48:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:48:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:48:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:48:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:48:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:48:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:48:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:48:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:48:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:48:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:48:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:48:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:48:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:48:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:48:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:48:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 22:48:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-06 22:48:04,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:48:04,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225864919] [2021-12-06 22:48:04,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225864919] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:04,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468403519] [2021-12-06 22:48:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:04,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:04,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:48:04,586 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:48:04,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 22:48:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:04,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 2745 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-06 22:48:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:48:04,992 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 [2021-12-06 22:48:05,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:48:09,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:48:09,831 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-12-06 22:48:09,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:48:09,842 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:48:09,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 22:48:09,846 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 [2021-12-06 22:48:09,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 22:48:12,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:48:12,740 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-12-06 22:48:12,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 29 [2021-12-06 22:48:12,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:48:12,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:48:12,750 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 17 treesize of output 15 [2021-12-06 22:48:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 24 proven. 62 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 22:48:14,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:48:15,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468403519] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:15,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:48:15,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 35] total 53 [2021-12-06 22:48:15,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711575622] [2021-12-06 22:48:15,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:48:15,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 22:48:15,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:48:15,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 22:48:15,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=3861, Unknown=2, NotChecked=0, Total=4160 [2021-12-06 22:48:15,311 INFO L87 Difference]: Start difference. First operand 1856 states and 2387 transitions. Second operand has 53 states, 50 states have (on average 3.8) internal successors, (190), 48 states have internal predecessors, (190), 16 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2021-12-06 22:48:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:48:27,531 INFO L93 Difference]: Finished difference Result 2189 states and 2842 transitions. [2021-12-06 22:48:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-06 22:48:27,531 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 3.8) internal successors, (190), 48 states have internal predecessors, (190), 16 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) Word has length 150 [2021-12-06 22:48:27,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:48:27,540 INFO L225 Difference]: With dead ends: 2189 [2021-12-06 22:48:27,540 INFO L226 Difference]: Without dead ends: 2103 [2021-12-06 22:48:27,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 173 SyntacticMatches, 24 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4867 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=926, Invalid=12875, Unknown=5, NotChecked=0, Total=13806 [2021-12-06 22:48:27,542 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 456 mSDsluCounter, 8838 mSDsCounter, 0 mSdLazyCounter, 5721 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 9294 SdHoareTripleChecker+Invalid, 10059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 5721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3987 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:48:27,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 9294 Invalid, 10059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 5721 Invalid, 0 Unknown, 3987 Unchecked, 3.6s Time] [2021-12-06 22:48:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-12-06 22:48:27,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1945. [2021-12-06 22:48:27,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1367 states have (on average 1.1009509875640089) internal successors, (1505), 1380 states have internal predecessors, (1505), 421 states have call successors, (421), 130 states have call predecessors, (421), 156 states have return successors, (570), 434 states have call predecessors, (570), 419 states have call successors, (570) [2021-12-06 22:48:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 2496 transitions. [2021-12-06 22:48:27,711 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 2496 transitions. Word has length 150 [2021-12-06 22:48:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:48:27,711 INFO L470 AbstractCegarLoop]: Abstraction has 1945 states and 2496 transitions. [2021-12-06 22:48:27,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 3.8) internal successors, (190), 48 states have internal predecessors, (190), 16 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2021-12-06 22:48:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 2496 transitions. [2021-12-06 22:48:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 22:48:27,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:48:27,715 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:48:27,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 22:48:27,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 22:48:27,916 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:48:27,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:48:27,917 INFO L85 PathProgramCache]: Analyzing trace with hash 829286941, now seen corresponding path program 1 times [2021-12-06 22:48:27,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:48:27,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740855174] [2021-12-06 22:48:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:27,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:48:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:48:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:48:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:48:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:48:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:48:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:48:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:48:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:48:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:48:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:48:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:48:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:48:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:48:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:48:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:48:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:48:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 22:48:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:48:28,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:48:28,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740855174] [2021-12-06 22:48:28,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740855174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:28,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58031491] [2021-12-06 22:48:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:28,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:28,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:48:28,369 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:48:28,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 22:48:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 22:48:28,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:48:28,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:48:28,814 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 22:48:28,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 22:48:29,192 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 22:48:29,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 22:48:29,320 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 16 treesize of output 18 [2021-12-06 22:48:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 22:48:30,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:48:30,983 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2186 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_2186) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base|))) (let ((.cse0 (mod (select .cse1 (+ |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset| 16)) 18446744073709551616))) (or (<= .cse0 0) (<= (mod (select .cse1 |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset|) 18446744073709551616) .cse0))))) is different from false [2021-12-06 22:48:30,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58031491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:30,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:48:30,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2021-12-06 22:48:30,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858270625] [2021-12-06 22:48:30,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:48:30,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 22:48:30,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:48:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 22:48:30,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1197, Unknown=1, NotChecked=70, Total=1406 [2021-12-06 22:48:30,999 INFO L87 Difference]: Start difference. First operand 1945 states and 2496 transitions. Second operand has 31 states, 30 states have (on average 5.866666666666666) internal successors, (176), 28 states have internal predecessors, (176), 13 states have call successors, (35), 8 states have call predecessors, (35), 9 states have return successors, (34), 11 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-06 22:48:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:48:34,029 INFO L93 Difference]: Finished difference Result 2508 states and 3231 transitions. [2021-12-06 22:48:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 22:48:34,029 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 5.866666666666666) internal successors, (176), 28 states have internal predecessors, (176), 13 states have call successors, (35), 8 states have call predecessors, (35), 9 states have return successors, (34), 11 states have call predecessors, (34), 13 states have call successors, (34) Word has length 150 [2021-12-06 22:48:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:48:34,036 INFO L225 Difference]: With dead ends: 2508 [2021-12-06 22:48:34,036 INFO L226 Difference]: Without dead ends: 2182 [2021-12-06 22:48:34,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 262 SyntacticMatches, 26 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=471, Invalid=3692, Unknown=1, NotChecked=126, Total=4290 [2021-12-06 22:48:34,038 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 583 mSDsluCounter, 2912 mSDsCounter, 0 mSdLazyCounter, 2717 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 3310 SdHoareTripleChecker+Invalid, 4816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 2717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1550 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 22:48:34,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 3310 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 2717 Invalid, 0 Unknown, 1550 Unchecked, 1.9s Time] [2021-12-06 22:48:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-12-06 22:48:34,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1919. [2021-12-06 22:48:34,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1352 states have (on average 1.1005917159763314) internal successors, (1488), 1365 states have internal predecessors, (1488), 409 states have call successors, (409), 132 states have call predecessors, (409), 157 states have return successors, (559), 421 states have call predecessors, (559), 407 states have call successors, (559) [2021-12-06 22:48:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 2456 transitions. [2021-12-06 22:48:34,210 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 2456 transitions. Word has length 150 [2021-12-06 22:48:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:48:34,210 INFO L470 AbstractCegarLoop]: Abstraction has 1919 states and 2456 transitions. [2021-12-06 22:48:34,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 5.866666666666666) internal successors, (176), 28 states have internal predecessors, (176), 13 states have call successors, (35), 8 states have call predecessors, (35), 9 states have return successors, (34), 11 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-06 22:48:34,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 2456 transitions. [2021-12-06 22:48:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 22:48:34,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:48:34,214 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:48:34,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 22:48:34,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:34,415 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:48:34,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:48:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1226526183, now seen corresponding path program 1 times [2021-12-06 22:48:34,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:48:34,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023646484] [2021-12-06 22:48:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:34,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:48:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:34,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:48:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:34,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:48:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:48:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:48:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:48:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:48:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:48:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:48:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:48:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:48:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:48:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:48:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:48:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:48:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:48:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:48:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 22:48:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 22:48:35,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:48:35,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023646484] [2021-12-06 22:48:35,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023646484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:35,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767848702] [2021-12-06 22:48:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:35,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:35,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:48:35,333 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:48:35,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 22:48:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:35,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 2745 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-06 22:48:35,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:48:35,725 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 [2021-12-06 22:48:35,727 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 [2021-12-06 22:48:40,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:48:41,727 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_149| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_149|) 8))) (and (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_149|) 16) 18446744073709551616) 0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_26|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_26| 8))) (not (= .cse0 0))))) is different from true [2021-12-06 22:48:41,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:48:41,926 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-12-06 22:48:41,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:48:41,937 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:48:41,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2021-12-06 22:48:41,941 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 [2021-12-06 22:48:41,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-12-06 22:48:44,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:48:44,980 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-12-06 22:48:44,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 29 [2021-12-06 22:48:44,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:48:44,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:48:44,987 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 17 treesize of output 15 [2021-12-06 22:48:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 24 proven. 62 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 22:48:50,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:48:51,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767848702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:51,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:48:51,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 52 [2021-12-06 22:48:51,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835265739] [2021-12-06 22:48:51,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:48:51,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 22:48:51,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:48:51,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 22:48:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3759, Unknown=4, NotChecked=124, Total=4160 [2021-12-06 22:48:51,298 INFO L87 Difference]: Start difference. First operand 1919 states and 2456 transitions. Second operand has 52 states, 48 states have (on average 3.8333333333333335) internal successors, (184), 46 states have internal predecessors, (184), 17 states have call successors, (35), 9 states have call predecessors, (35), 13 states have return successors, (34), 13 states have call predecessors, (34), 16 states have call successors, (34) [2021-12-06 22:49:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:49:16,323 INFO L93 Difference]: Finished difference Result 2208 states and 2911 transitions. [2021-12-06 22:49:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-06 22:49:16,323 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 48 states have (on average 3.8333333333333335) internal successors, (184), 46 states have internal predecessors, (184), 17 states have call successors, (35), 9 states have call predecessors, (35), 13 states have return successors, (34), 13 states have call predecessors, (34), 16 states have call successors, (34) Word has length 150 [2021-12-06 22:49:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:49:16,330 INFO L225 Difference]: With dead ends: 2208 [2021-12-06 22:49:16,330 INFO L226 Difference]: Without dead ends: 2128 [2021-12-06 22:49:16,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 163 SyntacticMatches, 19 SemanticMatches, 112 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4034 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=773, Invalid=11873, Unknown=14, NotChecked=222, Total=12882 [2021-12-06 22:49:16,332 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 535 mSDsluCounter, 5967 mSDsCounter, 0 mSdLazyCounter, 5212 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 6385 SdHoareTripleChecker+Invalid, 8169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 5212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2553 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 22:49:16,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 6385 Invalid, 8169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 5212 Invalid, 0 Unknown, 2553 Unchecked, 2.9s Time] [2021-12-06 22:49:16,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2021-12-06 22:49:16,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 1843. [2021-12-06 22:49:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1297 states have (on average 1.10254433307633) internal successors, (1430), 1308 states have internal predecessors, (1430), 395 states have call successors, (395), 128 states have call predecessors, (395), 150 states have return successors, (536), 406 states have call predecessors, (536), 393 states have call successors, (536) [2021-12-06 22:49:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2361 transitions. [2021-12-06 22:49:16,489 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2361 transitions. Word has length 150 [2021-12-06 22:49:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:49:16,489 INFO L470 AbstractCegarLoop]: Abstraction has 1843 states and 2361 transitions. [2021-12-06 22:49:16,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 48 states have (on average 3.8333333333333335) internal successors, (184), 46 states have internal predecessors, (184), 17 states have call successors, (35), 9 states have call predecessors, (35), 13 states have return successors, (34), 13 states have call predecessors, (34), 16 states have call successors, (34) [2021-12-06 22:49:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2361 transitions. [2021-12-06 22:49:16,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-06 22:49:16,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:49:16,493 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:49:16,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 22:49:16,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 22:49:16,693 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:49:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:49:16,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1360101414, now seen corresponding path program 1 times [2021-12-06 22:49:16,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:49:16,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620058981] [2021-12-06 22:49:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:16,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:49:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:49:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:49:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:49:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:49:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:49:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:49:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:49:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:49:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:49:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:49:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:49:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:49:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:49:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:49:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:49:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:49:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:16,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 22:49:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:49:17,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:49:17,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620058981] [2021-12-06 22:49:17,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620058981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:49:17,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56608064] [2021-12-06 22:49:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:17,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:49:17,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:49:17,062 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:49:17,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 22:49:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 2752 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 22:49:17,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:49:17,698 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:49:17,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-12-06 22:49:17,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:49:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 22:49:18,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:49:19,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56608064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:49:19,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:49:19,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-12-06 22:49:19,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776342464] [2021-12-06 22:49:19,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:49:19,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 22:49:19,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:49:19,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 22:49:19,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=820, Unknown=5, NotChecked=0, Total=930 [2021-12-06 22:49:19,355 INFO L87 Difference]: Start difference. First operand 1843 states and 2361 transitions. Second operand has 25 states, 22 states have (on average 7.5) internal successors, (165), 23 states have internal predecessors, (165), 11 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (33), 7 states have call predecessors, (33), 10 states have call successors, (33) [2021-12-06 22:49:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:49:22,056 INFO L93 Difference]: Finished difference Result 2106 states and 2722 transitions. [2021-12-06 22:49:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 22:49:22,056 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 7.5) internal successors, (165), 23 states have internal predecessors, (165), 11 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (33), 7 states have call predecessors, (33), 10 states have call successors, (33) Word has length 152 [2021-12-06 22:49:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:49:22,062 INFO L225 Difference]: With dead ends: 2106 [2021-12-06 22:49:22,062 INFO L226 Difference]: Without dead ends: 1994 [2021-12-06 22:49:22,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 256 SyntacticMatches, 25 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=438, Invalid=3094, Unknown=8, NotChecked=0, Total=3540 [2021-12-06 22:49:22,063 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 393 mSDsluCounter, 3706 mSDsCounter, 0 mSdLazyCounter, 2681 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 4072 SdHoareTripleChecker+Invalid, 4073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 2681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1151 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:49:22,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 4072 Invalid, 4073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 2681 Invalid, 0 Unknown, 1151 Unchecked, 1.6s Time] [2021-12-06 22:49:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-12-06 22:49:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1843. [2021-12-06 22:49:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1297 states have (on average 1.1017733230531996) internal successors, (1429), 1308 states have internal predecessors, (1429), 395 states have call successors, (395), 128 states have call predecessors, (395), 150 states have return successors, (535), 406 states have call predecessors, (535), 393 states have call successors, (535) [2021-12-06 22:49:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2359 transitions. [2021-12-06 22:49:22,213 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2359 transitions. Word has length 152 [2021-12-06 22:49:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:49:22,214 INFO L470 AbstractCegarLoop]: Abstraction has 1843 states and 2359 transitions. [2021-12-06 22:49:22,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 7.5) internal successors, (165), 23 states have internal predecessors, (165), 11 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (33), 7 states have call predecessors, (33), 10 states have call successors, (33) [2021-12-06 22:49:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2359 transitions. [2021-12-06 22:49:22,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-06 22:49:22,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:49:22,217 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:49:22,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 22:49:22,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 22:49:22,417 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:49:22,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:49:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash 659036836, now seen corresponding path program 1 times [2021-12-06 22:49:22,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:49:22,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949977541] [2021-12-06 22:49:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:22,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:49:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:49:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:49:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:49:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:49:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:49:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:49:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:49:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:49:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:49:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:49:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:49:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:49:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:49:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:49:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:49:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:49:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 22:49:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-06 22:49:22,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:49:22,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949977541] [2021-12-06 22:49:22,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949977541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:49:22,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:49:22,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 22:49:22,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652213883] [2021-12-06 22:49:22,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:49:22,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 22:49:22,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:49:22,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 22:49:22,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:49:22,633 INFO L87 Difference]: Start difference. First operand 1843 states and 2359 transitions. Second operand has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-06 22:49:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:49:23,366 INFO L93 Difference]: Finished difference Result 1913 states and 2444 transitions. [2021-12-06 22:49:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:49:23,367 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 152 [2021-12-06 22:49:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:49:23,373 INFO L225 Difference]: With dead ends: 1913 [2021-12-06 22:49:23,373 INFO L226 Difference]: Without dead ends: 1911 [2021-12-06 22:49:23,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:49:23,374 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 227 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:49:23,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 2200 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:49:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-12-06 22:49:23,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1867. [2021-12-06 22:49:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1314 states have (on average 1.1004566210045663) internal successors, (1446), 1328 states have internal predecessors, (1446), 397 states have call successors, (397), 130 states have call predecessors, (397), 155 states have return successors, (544), 408 states have call predecessors, (544), 395 states have call successors, (544) [2021-12-06 22:49:23,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2387 transitions. [2021-12-06 22:49:23,521 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2387 transitions. Word has length 152 [2021-12-06 22:49:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:49:23,522 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 2387 transitions. [2021-12-06 22:49:23,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-06 22:49:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2387 transitions. [2021-12-06 22:49:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 22:49:23,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:49:23,525 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:49:23,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-06 22:49:23,525 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:49:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:49:23,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1743476429, now seen corresponding path program 1 times [2021-12-06 22:49:23,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:49:23,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264283063] [2021-12-06 22:49:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:23,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:49:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:49:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:49:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:49:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:49:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 22:49:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:49:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:49:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 22:49:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 22:49:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 22:49:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 22:49:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:49:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 22:49:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:49:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 22:49:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 22:49:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-06 22:49:23,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:49:23,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264283063] [2021-12-06 22:49:23,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264283063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:49:23,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:49:23,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 22:49:23,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359840989] [2021-12-06 22:49:23,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:49:23,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:49:23,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:49:23,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:49:23,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:49:23,716 INFO L87 Difference]: Start difference. First operand 1867 states and 2387 transitions. Second operand has 9 states, 8 states have (on average 8.0) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-06 22:49:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:49:24,288 INFO L93 Difference]: Finished difference Result 1935 states and 2501 transitions. [2021-12-06 22:49:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:49:24,288 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 151 [2021-12-06 22:49:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:49:24,293 INFO L225 Difference]: With dead ends: 1935 [2021-12-06 22:49:24,293 INFO L226 Difference]: Without dead ends: 1933 [2021-12-06 22:49:24,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:49:24,294 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 110 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:49:24,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 1721 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:49:24,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2021-12-06 22:49:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1894. [2021-12-06 22:49:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1326 states have (on average 1.0995475113122173) internal successors, (1458), 1342 states have internal predecessors, (1458), 408 states have call successors, (408), 132 states have call predecessors, (408), 159 states have return successors, (586), 419 states have call predecessors, (586), 406 states have call successors, (586) [2021-12-06 22:49:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2452 transitions. [2021-12-06 22:49:24,451 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2452 transitions. Word has length 151 [2021-12-06 22:49:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:49:24,451 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 2452 transitions. [2021-12-06 22:49:24,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-06 22:49:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2452 transitions. [2021-12-06 22:49:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-06 22:49:24,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:49:24,454 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:49:24,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-06 22:49:24,455 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:49:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:49:24,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1980778316, now seen corresponding path program 1 times [2021-12-06 22:49:24,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:49:24,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248036384] [2021-12-06 22:49:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:24,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:49:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:49:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:49:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:49:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:49:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:49:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:49:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:49:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:49:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 22:49:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:49:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:49:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 22:49:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:49:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:49:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:49:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 22:49:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-06 22:49:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-06 22:49:24,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:49:24,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248036384] [2021-12-06 22:49:24,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248036384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:49:24,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210872694] [2021-12-06 22:49:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:24,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:49:24,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:49:24,790 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:49:24,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 22:49:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:25,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 2772 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 22:49:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:49:25,165 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 [2021-12-06 22:49:25,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:49:36,498 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 22:49:36,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 39 [2021-12-06 22:49:36,511 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 22:49:36,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-06 22:49:36,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-06 22:49:36,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-06 22:49:54,350 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 22:49:54,350 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 83 treesize of output 53 [2021-12-06 22:49:55,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-12-06 22:49:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 54 proven. 33 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:49:55,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:49:56,479 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2502 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_2502))) (let ((.cse0 (mod (select (select .cse1 |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset|) 18446744073709551616))) (or (and (forall ((v_ArrVal_2501 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_2501) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset| 8)) 0))) (< 0 .cse0)) (not (= .cse0 (mod (select (select .cse1 |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset|) 18446744073709551616))))))) is different from false [2021-12-06 22:49:56,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210872694] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:49:56,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:49:56,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 27] total 37 [2021-12-06 22:49:56,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288410555] [2021-12-06 22:49:56,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:49:56,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 22:49:56,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:49:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 22:49:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2093, Unknown=1, NotChecked=92, Total=2352 [2021-12-06 22:49:56,515 INFO L87 Difference]: Start difference. First operand 1894 states and 2452 transitions. Second operand has 37 states, 34 states have (on average 5.205882352941177) internal successors, (177), 28 states have internal predecessors, (177), 12 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2021-12-06 22:49:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:49:59,056 INFO L93 Difference]: Finished difference Result 2675 states and 3364 transitions. [2021-12-06 22:49:59,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 22:49:59,057 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 5.205882352941177) internal successors, (177), 28 states have internal predecessors, (177), 12 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) Word has length 156 [2021-12-06 22:49:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:49:59,061 INFO L225 Difference]: With dead ends: 2675 [2021-12-06 22:49:59,061 INFO L226 Difference]: Without dead ends: 1872 [2021-12-06 22:49:59,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 253 SyntacticMatches, 17 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=367, Invalid=5186, Unknown=1, NotChecked=146, Total=5700 [2021-12-06 22:49:59,063 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 322 mSDsluCounter, 3442 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 3749 SdHoareTripleChecker+Invalid, 3403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1310 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:49:59,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 3749 Invalid, 3403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1859 Invalid, 0 Unknown, 1310 Unchecked, 1.2s Time] [2021-12-06 22:49:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-12-06 22:49:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1796. [2021-12-06 22:49:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1252 states have (on average 1.0982428115015974) internal successors, (1375), 1268 states have internal predecessors, (1375), 391 states have call successors, (391), 127 states have call predecessors, (391), 152 states have return successors, (557), 400 states have call predecessors, (557), 389 states have call successors, (557) [2021-12-06 22:49:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2323 transitions. [2021-12-06 22:49:59,218 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2323 transitions. Word has length 156 [2021-12-06 22:49:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:49:59,219 INFO L470 AbstractCegarLoop]: Abstraction has 1796 states and 2323 transitions. [2021-12-06 22:49:59,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 5.205882352941177) internal successors, (177), 28 states have internal predecessors, (177), 12 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2021-12-06 22:49:59,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2323 transitions. [2021-12-06 22:49:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-06 22:49:59,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:49:59,222 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:49:59,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 22:49:59,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 22:49:59,423 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:49:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:49:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1547127637, now seen corresponding path program 1 times [2021-12-06 22:49:59,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:49:59,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122153019] [2021-12-06 22:49:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:59,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:49:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:49:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:49:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:49:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:49:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 22:49:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:49:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:49:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 22:49:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 22:49:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 22:49:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 22:49:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:49:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 22:49:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:49:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 22:49:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 22:49:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 22:49:59,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:49:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122153019] [2021-12-06 22:49:59,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122153019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:49:59,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957576908] [2021-12-06 22:49:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:59,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:49:59,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:49:59,826 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:49:59,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 22:50:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:00,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 2757 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 22:50:00,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:50:04,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:04,560 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 [2021-12-06 22:50:17,334 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 22:50:17,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 30 [2021-12-06 22:50:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 23 proven. 63 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 22:50:17,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:50:17,961 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2593 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.base| v_ArrVal_2593) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_~from#1.base|) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_~from#1.offset|))) (<= .cse0 (* 18446744073709551616 (div .cse0 18446744073709551616))))) is different from false [2021-12-06 22:50:18,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957576908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:50:18,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:50:18,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-12-06 22:50:18,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619610835] [2021-12-06 22:50:18,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:50:18,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 22:50:18,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:50:18,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 22:50:18,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1276, Unknown=2, NotChecked=72, Total=1482 [2021-12-06 22:50:18,117 INFO L87 Difference]: Start difference. First operand 1796 states and 2323 transitions. Second operand has 34 states, 33 states have (on average 5.181818181818182) internal successors, (171), 31 states have internal predecessors, (171), 16 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (32), 14 states have call predecessors, (32), 15 states have call successors, (32) [2021-12-06 22:50:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:50:22,774 INFO L93 Difference]: Finished difference Result 2744 states and 3585 transitions. [2021-12-06 22:50:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 22:50:22,775 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 5.181818181818182) internal successors, (171), 31 states have internal predecessors, (171), 16 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (32), 14 states have call predecessors, (32), 15 states have call successors, (32) Word has length 155 [2021-12-06 22:50:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:50:22,779 INFO L225 Difference]: With dead ends: 2744 [2021-12-06 22:50:22,779 INFO L226 Difference]: Without dead ends: 2062 [2021-12-06 22:50:22,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 205 SyntacticMatches, 20 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=538, Invalid=5944, Unknown=2, NotChecked=158, Total=6642 [2021-12-06 22:50:22,782 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 718 mSDsluCounter, 4048 mSDsCounter, 0 mSdLazyCounter, 5279 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 4435 SdHoareTripleChecker+Invalid, 7638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 5279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1550 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:50:22,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 4435 Invalid, 7638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 5279 Invalid, 0 Unknown, 1550 Unchecked, 3.2s Time] [2021-12-06 22:50:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-12-06 22:50:22,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1853. [2021-12-06 22:50:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1288 states have (on average 1.0962732919254659) internal successors, (1412), 1306 states have internal predecessors, (1412), 411 states have call successors, (411), 129 states have call predecessors, (411), 153 states have return successors, (571), 417 states have call predecessors, (571), 409 states have call successors, (571) [2021-12-06 22:50:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 2394 transitions. [2021-12-06 22:50:22,964 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 2394 transitions. Word has length 155 [2021-12-06 22:50:22,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:50:22,965 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 2394 transitions. [2021-12-06 22:50:22,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 5.181818181818182) internal successors, (171), 31 states have internal predecessors, (171), 16 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (32), 14 states have call predecessors, (32), 15 states have call successors, (32) [2021-12-06 22:50:22,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 2394 transitions. [2021-12-06 22:50:22,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 22:50:22,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:50:22,968 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:50:22,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 22:50:23,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-06 22:50:23,169 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:50:23,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:50:23,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1484184976, now seen corresponding path program 1 times [2021-12-06 22:50:23,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:50:23,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306933664] [2021-12-06 22:50:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:50:23,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:50:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:50:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:50:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:50:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:50:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:50:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:50:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:50:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:50:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 22:50:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 22:50:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 22:50:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:50:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:50:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 22:50:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 22:50:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:50:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:50:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-06 22:50:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 22:50:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 22:50:23,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:50:23,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306933664] [2021-12-06 22:50:23,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306933664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:50:23,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297507328] [2021-12-06 22:50:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:50:23,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:50:23,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:50:23,599 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:50:23,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 22:50:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:23,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 2782 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-06 22:50:23,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:50:23,979 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 [2021-12-06 22:50:24,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:50:24,824 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 22:50:24,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2021-12-06 22:50:24,840 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:50:24,840 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 17 treesize of output 23 [2021-12-06 22:50:24,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 22:50:25,510 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 20 treesize of output 8 [2021-12-06 22:50:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 33 proven. 74 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 22:50:26,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:50:28,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297507328] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:50:28,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:50:28,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 34] total 46 [2021-12-06 22:50:28,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474089290] [2021-12-06 22:50:28,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:50:28,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 22:50:28,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:50:28,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 22:50:28,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3169, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 22:50:28,107 INFO L87 Difference]: Start difference. First operand 1853 states and 2394 transitions. Second operand has 46 states, 42 states have (on average 4.5476190476190474) internal successors, (191), 40 states have internal predecessors, (191), 14 states have call successors, (37), 7 states have call predecessors, (37), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2021-12-06 22:50:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:50:32,208 INFO L93 Difference]: Finished difference Result 2225 states and 2917 transitions. [2021-12-06 22:50:32,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 22:50:32,208 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 4.5476190476190474) internal successors, (191), 40 states have internal predecessors, (191), 14 states have call successors, (37), 7 states have call predecessors, (37), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) Word has length 161 [2021-12-06 22:50:32,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:50:32,213 INFO L225 Difference]: With dead ends: 2225 [2021-12-06 22:50:32,213 INFO L226 Difference]: Without dead ends: 2067 [2021-12-06 22:50:32,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 175 SyntacticMatches, 25 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=732, Invalid=9168, Unknown=0, NotChecked=0, Total=9900 [2021-12-06 22:50:32,215 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 425 mSDsluCounter, 4527 mSDsCounter, 0 mSdLazyCounter, 3882 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 4903 SdHoareTripleChecker+Invalid, 5996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 3882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1749 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:50:32,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 4903 Invalid, 5996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 3882 Invalid, 0 Unknown, 1749 Unchecked, 2.2s Time] [2021-12-06 22:50:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-12-06 22:50:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1895. [2021-12-06 22:50:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1316 states have (on average 1.093465045592705) internal successors, (1439), 1334 states have internal predecessors, (1439), 422 states have call successors, (422), 132 states have call predecessors, (422), 156 states have return successors, (586), 428 states have call predecessors, (586), 420 states have call successors, (586) [2021-12-06 22:50:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2447 transitions. [2021-12-06 22:50:32,383 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2447 transitions. Word has length 161 [2021-12-06 22:50:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:50:32,383 INFO L470 AbstractCegarLoop]: Abstraction has 1895 states and 2447 transitions. [2021-12-06 22:50:32,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 4.5476190476190474) internal successors, (191), 40 states have internal predecessors, (191), 14 states have call successors, (37), 7 states have call predecessors, (37), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2021-12-06 22:50:32,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2447 transitions. [2021-12-06 22:50:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 22:50:32,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:50:32,387 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:50:32,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 22:50:32,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:50:32,588 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:50:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:50:32,589 INFO L85 PathProgramCache]: Analyzing trace with hash -362328364, now seen corresponding path program 1 times [2021-12-06 22:50:32,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:50:32,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71572083] [2021-12-06 22:50:32,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:50:32,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:50:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:50:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:50:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:50:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:50:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:50:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:50:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:50:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:50:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 22:50:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 22:50:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 22:50:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:50:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:50:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 22:50:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 22:50:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:50:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:50:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-06 22:50:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:32,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 22:50:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-06 22:50:33,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:50:33,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71572083] [2021-12-06 22:50:33,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71572083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:50:33,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971248533] [2021-12-06 22:50:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:50:33,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:50:33,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:50:33,006 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:50:33,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 22:50:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:33,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 2784 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-06 22:50:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:50:33,412 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 [2021-12-06 22:50:33,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:50:47,081 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_52| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_234| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_52| Int)) (let ((.cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_234|) 0)) (.cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_234|) 8))) (and (not (= (mod .cse0 18446744073709551616) 0)) (not (= .cse1 0)) (= .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_52|) |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_52|)) (= .cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_52|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_52| 8)))))) is different from true [2021-12-06 22:50:47,302 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 22:50:47,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 39 [2021-12-06 22:50:47,316 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 22:50:47,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-06 22:50:47,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-06 22:50:47,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-06 22:50:55,578 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 22:50:55,579 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 83 treesize of output 53 [2021-12-06 22:50:56,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-12-06 22:50:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 60 proven. 33 refuted. 0 times theorem prover too weak. 19 trivial. 18 not checked. [2021-12-06 22:50:56,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:50:57,489 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2759 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_2759))) (let ((.cse0 (mod (select (select .cse1 |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset|) 18446744073709551616))) (or (and (< 0 .cse0) (forall ((v_ArrVal_2758 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_2758) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset| 8)) 0)))) (not (= .cse0 (mod (select (select .cse1 |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset|) 18446744073709551616))))))) is different from false [2021-12-06 22:50:57,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971248533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:50:57,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:50:57,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27] total 38 [2021-12-06 22:50:57,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141791351] [2021-12-06 22:50:57,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:50:57,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 22:50:57,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:50:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 22:50:57,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2094, Unknown=2, NotChecked=186, Total=2450 [2021-12-06 22:50:57,526 INFO L87 Difference]: Start difference. First operand 1895 states and 2447 transitions. Second operand has 38 states, 33 states have (on average 5.666666666666667) internal successors, (187), 30 states have internal predecessors, (187), 14 states have call successors, (37), 9 states have call predecessors, (37), 12 states have return successors, (36), 11 states have call predecessors, (36), 14 states have call successors, (36) [2021-12-06 22:51:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:51:05,567 INFO L93 Difference]: Finished difference Result 2213 states and 2872 transitions. [2021-12-06 22:51:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 22:51:05,568 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 5.666666666666667) internal successors, (187), 30 states have internal predecessors, (187), 14 states have call successors, (37), 9 states have call predecessors, (37), 12 states have return successors, (36), 11 states have call predecessors, (36), 14 states have call successors, (36) Word has length 161 [2021-12-06 22:51:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:51:05,572 INFO L225 Difference]: With dead ends: 2213 [2021-12-06 22:51:05,572 INFO L226 Difference]: Without dead ends: 2021 [2021-12-06 22:51:05,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 257 SyntacticMatches, 22 SemanticMatches, 88 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=477, Invalid=7185, Unknown=2, NotChecked=346, Total=8010 [2021-12-06 22:51:05,574 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 614 mSDsluCounter, 5727 mSDsCounter, 0 mSdLazyCounter, 6128 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 6162 SdHoareTripleChecker+Invalid, 10256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 6128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3445 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:51:05,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 6162 Invalid, 10256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 6128 Invalid, 0 Unknown, 3445 Unchecked, 4.0s Time] [2021-12-06 22:51:05,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-12-06 22:51:05,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1858. [2021-12-06 22:51:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1290 states have (on average 1.0937984496124031) internal successors, (1411), 1307 states have internal predecessors, (1411), 415 states have call successors, (415), 129 states have call predecessors, (415), 152 states have return successors, (568), 421 states have call predecessors, (568), 413 states have call successors, (568) [2021-12-06 22:51:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 2394 transitions. [2021-12-06 22:51:05,742 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 2394 transitions. Word has length 161 [2021-12-06 22:51:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:51:05,742 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 2394 transitions. [2021-12-06 22:51:05,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 5.666666666666667) internal successors, (187), 30 states have internal predecessors, (187), 14 states have call successors, (37), 9 states have call predecessors, (37), 12 states have return successors, (36), 11 states have call predecessors, (36), 14 states have call successors, (36) [2021-12-06 22:51:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 2394 transitions. [2021-12-06 22:51:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 22:51:05,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:51:05,746 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:51:05,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 22:51:05,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:51:05,947 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:51:05,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:51:05,947 INFO L85 PathProgramCache]: Analyzing trace with hash -150265644, now seen corresponding path program 2 times [2021-12-06 22:51:05,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:51:05,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914433947] [2021-12-06 22:51:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:51:05,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:51:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:51:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:51:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:51:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:51:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:51:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:51:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:51:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:51:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 22:51:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 22:51:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 22:51:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:51:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:51:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 22:51:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 22:51:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:51:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:51:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-06 22:51:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 22:51:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-06 22:51:06,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:51:06,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914433947] [2021-12-06 22:51:06,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914433947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:51:06,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392584953] [2021-12-06 22:51:06,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:51:06,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:51:06,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:51:06,454 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:51:06,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 22:51:06,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:51:06,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:51:06,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 2784 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 22:51:06,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:51:06,875 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 [2021-12-06 22:51:15,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:51:15,451 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 22:51:15,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 25 [2021-12-06 22:51:30,703 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 20 treesize of output 8 [2021-12-06 22:51:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 108 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 22:51:33,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:51:34,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:51:34,085 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 33 [2021-12-06 22:51:34,261 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-06 22:51:34,261 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 19 treesize of output 18 [2021-12-06 22:51:46,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392584953] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:51:46,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:51:46,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 42 [2021-12-06 22:51:46,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538582382] [2021-12-06 22:51:46,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:51:46,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 22:51:46,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:51:46,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 22:51:46,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=3320, Unknown=9, NotChecked=0, Total=3540 [2021-12-06 22:51:46,618 INFO L87 Difference]: Start difference. First operand 1858 states and 2394 transitions. Second operand has 42 states, 38 states have (on average 4.947368421052632) internal successors, (188), 35 states have internal predecessors, (188), 17 states have call successors, (38), 7 states have call predecessors, (38), 12 states have return successors, (37), 15 states have call predecessors, (37), 17 states have call successors, (37) [2021-12-06 22:52:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:06,264 INFO L93 Difference]: Finished difference Result 2491 states and 3247 transitions. [2021-12-06 22:52:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 22:52:06,264 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 4.947368421052632) internal successors, (188), 35 states have internal predecessors, (188), 17 states have call successors, (38), 7 states have call predecessors, (38), 12 states have return successors, (37), 15 states have call predecessors, (37), 17 states have call successors, (37) Word has length 161 [2021-12-06 22:52:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:06,270 INFO L225 Difference]: With dead ends: 2491 [2021-12-06 22:52:06,270 INFO L226 Difference]: Without dead ends: 1891 [2021-12-06 22:52:06,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 256 SyntacticMatches, 19 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 56.2s TimeCoverageRelationStatistics Valid=578, Invalid=8718, Unknown=16, NotChecked=0, Total=9312 [2021-12-06 22:52:06,275 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 331 mSDsluCounter, 5954 mSDsCounter, 0 mSdLazyCounter, 3852 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 6370 SdHoareTripleChecker+Invalid, 7032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 3852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2906 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:06,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 6370 Invalid, 7032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 3852 Invalid, 0 Unknown, 2906 Unchecked, 2.0s Time] [2021-12-06 22:52:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-12-06 22:52:06,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1753. [2021-12-06 22:52:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1216 states have (on average 1.089638157894737) internal successors, (1325), 1231 states have internal predecessors, (1325), 389 states have call successors, (389), 126 states have call predecessors, (389), 147 states have return successors, (534), 395 states have call predecessors, (534), 387 states have call successors, (534) [2021-12-06 22:52:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2248 transitions. [2021-12-06 22:52:06,442 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2248 transitions. Word has length 161 [2021-12-06 22:52:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:06,442 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 2248 transitions. [2021-12-06 22:52:06,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 4.947368421052632) internal successors, (188), 35 states have internal predecessors, (188), 17 states have call successors, (38), 7 states have call predecessors, (38), 12 states have return successors, (37), 15 states have call predecessors, (37), 17 states have call successors, (37) [2021-12-06 22:52:06,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2248 transitions. [2021-12-06 22:52:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 22:52:06,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:06,445 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:06,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 22:52:06,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 22:52:06,647 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:52:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:06,648 INFO L85 PathProgramCache]: Analyzing trace with hash 357771239, now seen corresponding path program 1 times [2021-12-06 22:52:06,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:06,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262612408] [2021-12-06 22:52:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:06,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:52:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:52:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:52:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:52:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 22:52:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:52:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:52:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 22:52:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 22:52:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 22:52:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 22:52:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:52:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 22:52:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:52:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 22:52:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 22:52:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-06 22:52:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-06 22:52:07,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:52:07,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262612408] [2021-12-06 22:52:07,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262612408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:52:07,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:52:07,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-06 22:52:07,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818901898] [2021-12-06 22:52:07,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:52:07,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:52:07,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:52:07,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:52:07,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:52:07,436 INFO L87 Difference]: Start difference. First operand 1753 states and 2248 transitions. Second operand has 22 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 10 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-06 22:52:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:10,895 INFO L93 Difference]: Finished difference Result 2119 states and 2888 transitions. [2021-12-06 22:52:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 22:52:10,896 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 10 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 9 states have call successors, (17) Word has length 159 [2021-12-06 22:52:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:10,901 INFO L225 Difference]: With dead ends: 2119 [2021-12-06 22:52:10,901 INFO L226 Difference]: Without dead ends: 2107 [2021-12-06 22:52:10,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 22:52:10,903 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 512 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 3665 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 2114 SdHoareTripleChecker+Invalid, 4155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 3665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:10,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 2114 Invalid, 4155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 3665 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 22:52:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-12-06 22:52:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1803. [2021-12-06 22:52:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1254 states have (on average 1.0909090909090908) internal successors, (1368), 1269 states have internal predecessors, (1368), 397 states have call successors, (397), 130 states have call predecessors, (397), 151 states have return successors, (544), 403 states have call predecessors, (544), 395 states have call successors, (544) [2021-12-06 22:52:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2309 transitions. [2021-12-06 22:52:11,089 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2309 transitions. Word has length 159 [2021-12-06 22:52:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:11,090 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 2309 transitions. [2021-12-06 22:52:11,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 10 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-06 22:52:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2309 transitions. [2021-12-06 22:52:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 22:52:11,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:11,093 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:11,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-06 22:52:11,093 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:52:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:11,093 INFO L85 PathProgramCache]: Analyzing trace with hash -664184092, now seen corresponding path program 1 times [2021-12-06 22:52:11,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:11,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468489892] [2021-12-06 22:52:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:11,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:52:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:52:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:52:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:52:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 22:52:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:52:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:52:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 22:52:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 22:52:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 22:52:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 22:52:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:52:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 22:52:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:52:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 22:52:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 22:52:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-06 22:52:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-06 22:52:11,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:52:11,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468489892] [2021-12-06 22:52:11,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468489892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:52:11,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:52:11,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:52:11,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444264977] [2021-12-06 22:52:11,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:52:11,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:52:11,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:52:11,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:52:11,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:52:11,244 INFO L87 Difference]: Start difference. First operand 1803 states and 2309 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-06 22:52:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:11,671 INFO L93 Difference]: Finished difference Result 2248 states and 2907 transitions. [2021-12-06 22:52:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:52:11,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 161 [2021-12-06 22:52:11,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:11,676 INFO L225 Difference]: With dead ends: 2248 [2021-12-06 22:52:11,676 INFO L226 Difference]: Without dead ends: 1830 [2021-12-06 22:52:11,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:52:11,678 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 100 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:11,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 871 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:52:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-12-06 22:52:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1771. [2021-12-06 22:52:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1238 states have (on average 1.0807754442649435) internal successors, (1338), 1253 states have internal predecessors, (1338), 381 states have call successors, (381), 130 states have call predecessors, (381), 151 states have return successors, (528), 387 states have call predecessors, (528), 379 states have call successors, (528) [2021-12-06 22:52:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2247 transitions. [2021-12-06 22:52:11,837 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2247 transitions. Word has length 161 [2021-12-06 22:52:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:11,837 INFO L470 AbstractCegarLoop]: Abstraction has 1771 states and 2247 transitions. [2021-12-06 22:52:11,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-06 22:52:11,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2247 transitions. [2021-12-06 22:52:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-06 22:52:11,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:11,840 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:11,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-06 22:52:11,840 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:52:11,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:11,840 INFO L85 PathProgramCache]: Analyzing trace with hash -8529142, now seen corresponding path program 1 times [2021-12-06 22:52:11,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:11,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045852111] [2021-12-06 22:52:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:11,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:52:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:52:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:52:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:52:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 22:52:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:52:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:52:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 22:52:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 22:52:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:52:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:52:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:52:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:52:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 22:52:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:11,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-06 22:52:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:12,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:12,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-06 22:52:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:52:12,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:52:12,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045852111] [2021-12-06 22:52:12,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045852111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:52:12,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:52:12,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:52:12,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221015051] [2021-12-06 22:52:12,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:52:12,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:52:12,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:52:12,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:52:12,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:52:12,020 INFO L87 Difference]: Start difference. First operand 1771 states and 2247 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-06 22:52:12,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:12,535 INFO L93 Difference]: Finished difference Result 2203 states and 2797 transitions. [2021-12-06 22:52:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:52:12,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 164 [2021-12-06 22:52:12,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:12,539 INFO L225 Difference]: With dead ends: 2203 [2021-12-06 22:52:12,539 INFO L226 Difference]: Without dead ends: 1823 [2021-12-06 22:52:12,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:52:12,541 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 190 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:12,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 998 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:52:12,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-12-06 22:52:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1781. [2021-12-06 22:52:12,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1246 states have (on average 1.0802568218298556) internal successors, (1346), 1261 states have internal predecessors, (1346), 381 states have call successors, (381), 130 states have call predecessors, (381), 153 states have return successors, (530), 389 states have call predecessors, (530), 379 states have call successors, (530) [2021-12-06 22:52:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2257 transitions. [2021-12-06 22:52:12,707 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2257 transitions. Word has length 164 [2021-12-06 22:52:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:12,707 INFO L470 AbstractCegarLoop]: Abstraction has 1781 states and 2257 transitions. [2021-12-06 22:52:12,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-06 22:52:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2257 transitions. [2021-12-06 22:52:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-06 22:52:12,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:12,709 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:12,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-06 22:52:12,710 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:52:12,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:12,710 INFO L85 PathProgramCache]: Analyzing trace with hash 136914961, now seen corresponding path program 1 times [2021-12-06 22:52:12,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:12,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269202212] [2021-12-06 22:52:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:12,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:52:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:52:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:52:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:52:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:52:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:52:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:52:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:52:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:52:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:52:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:52:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:52:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:52:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:52:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:52:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:52:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 22:52:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 22:52:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-06 22:52:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-06 22:52:13,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:52:13,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269202212] [2021-12-06 22:52:13,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269202212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:52:13,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565026837] [2021-12-06 22:52:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:13,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:52:13,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:52:13,725 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:52:13,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 22:52:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:14,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 2785 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 22:52:14,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:52:14,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:52:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:52:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:52:18,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:52:18,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:52:18,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-12-06 22:52:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 22:52:23,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:52:28,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565026837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:52:28,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:52:28,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 40 [2021-12-06 22:52:28,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822131672] [2021-12-06 22:52:28,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:52:28,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 22:52:28,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:52:28,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 22:52:28,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2144, Unknown=2, NotChecked=0, Total=2352 [2021-12-06 22:52:28,420 INFO L87 Difference]: Start difference. First operand 1781 states and 2257 transitions. Second operand has 40 states, 38 states have (on average 5.2368421052631575) internal successors, (199), 36 states have internal predecessors, (199), 17 states have call successors, (41), 6 states have call predecessors, (41), 9 states have return successors, (40), 12 states have call predecessors, (40), 16 states have call successors, (40) [2021-12-06 22:52:36,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:36,069 INFO L93 Difference]: Finished difference Result 2207 states and 2883 transitions. [2021-12-06 22:52:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 22:52:36,069 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 5.2368421052631575) internal successors, (199), 36 states have internal predecessors, (199), 17 states have call successors, (41), 6 states have call predecessors, (41), 9 states have return successors, (40), 12 states have call predecessors, (40), 16 states have call successors, (40) Word has length 167 [2021-12-06 22:52:36,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:36,073 INFO L225 Difference]: With dead ends: 2207 [2021-12-06 22:52:36,073 INFO L226 Difference]: Without dead ends: 2023 [2021-12-06 22:52:36,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 287 SyntacticMatches, 20 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2841 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=744, Invalid=7263, Unknown=3, NotChecked=0, Total=8010 [2021-12-06 22:52:36,075 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 1127 mSDsluCounter, 3646 mSDsCounter, 0 mSdLazyCounter, 5175 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 4111 SdHoareTripleChecker+Invalid, 7072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 5175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1081 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:36,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1202 Valid, 4111 Invalid, 7072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 5175 Invalid, 0 Unknown, 1081 Unchecked, 3.5s Time] [2021-12-06 22:52:36,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-12-06 22:52:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1791. [2021-12-06 22:52:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1257 states have (on average 1.0787589498806682) internal successors, (1356), 1272 states have internal predecessors, (1356), 376 states have call successors, (376), 134 states have call predecessors, (376), 157 states have return successors, (521), 384 states have call predecessors, (521), 374 states have call successors, (521) [2021-12-06 22:52:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2253 transitions. [2021-12-06 22:52:36,256 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2253 transitions. Word has length 167 [2021-12-06 22:52:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:36,256 INFO L470 AbstractCegarLoop]: Abstraction has 1791 states and 2253 transitions. [2021-12-06 22:52:36,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 5.2368421052631575) internal successors, (199), 36 states have internal predecessors, (199), 17 states have call successors, (41), 6 states have call predecessors, (41), 9 states have return successors, (40), 12 states have call predecessors, (40), 16 states have call successors, (40) [2021-12-06 22:52:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2253 transitions. [2021-12-06 22:52:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-06 22:52:36,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:36,258 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:36,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-06 22:52:36,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:52:36,460 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:52:36,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1709598379, now seen corresponding path program 1 times [2021-12-06 22:52:36,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:36,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371419209] [2021-12-06 22:52:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:36,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:52:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:36,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:52:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:36,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:52:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:36,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:36,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:52:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:36,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:52:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:36,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:52:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:36,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:52:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:36,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:52:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:36,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:52:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:52:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:52:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:52:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:52:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:52:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:52:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:52:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 22:52:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 22:52:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-06 22:52:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 43 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-06 22:52:37,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:52:37,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371419209] [2021-12-06 22:52:37,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371419209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:52:37,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115862407] [2021-12-06 22:52:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:37,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:52:37,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:52:37,420 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:52:37,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 22:52:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:37,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 2787 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 22:52:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:52:37,820 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 [2021-12-06 22:52:38,461 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:52:38,462 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 40 treesize of output 40 [2021-12-06 22:52:38,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:52:38,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:52:38,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-06 22:52:39,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:52:39,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:52:39,826 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 17 treesize of output 15 [2021-12-06 22:52:39,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:52:39,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:52:39,834 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 17 treesize of output 15 [2021-12-06 22:52:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 44 proven. 64 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 22:52:40,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:52:41,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115862407] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:52:41,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:52:41,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 38 [2021-12-06 22:52:41,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259557312] [2021-12-06 22:52:41,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:52:41,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 22:52:41,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:52:41,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 22:52:41,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1808, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 22:52:41,460 INFO L87 Difference]: Start difference. First operand 1791 states and 2253 transitions. Second operand has 38 states, 34 states have (on average 5.323529411764706) internal successors, (181), 36 states have internal predecessors, (181), 17 states have call successors, (39), 6 states have call predecessors, (39), 9 states have return successors, (39), 13 states have call predecessors, (39), 16 states have call successors, (39) [2021-12-06 22:52:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:45,955 INFO L93 Difference]: Finished difference Result 2058 states and 2628 transitions. [2021-12-06 22:52:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 22:52:45,956 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 5.323529411764706) internal successors, (181), 36 states have internal predecessors, (181), 17 states have call successors, (39), 6 states have call predecessors, (39), 9 states have return successors, (39), 13 states have call predecessors, (39), 16 states have call successors, (39) Word has length 167 [2021-12-06 22:52:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:45,959 INFO L225 Difference]: With dead ends: 2058 [2021-12-06 22:52:45,959 INFO L226 Difference]: Without dead ends: 1972 [2021-12-06 22:52:45,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 208 SyntacticMatches, 15 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=423, Invalid=4547, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 22:52:45,961 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 424 mSDsluCounter, 5003 mSDsCounter, 0 mSdLazyCounter, 3299 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 5371 SdHoareTripleChecker+Invalid, 4349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 3299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 814 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:45,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 5371 Invalid, 4349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 3299 Invalid, 0 Unknown, 814 Unchecked, 2.9s Time] [2021-12-06 22:52:45,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-12-06 22:52:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1811. [2021-12-06 22:52:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1273 states have (on average 1.0769835035349569) internal successors, (1371), 1288 states have internal predecessors, (1371), 378 states have call successors, (378), 136 states have call predecessors, (378), 159 states have return successors, (524), 386 states have call predecessors, (524), 376 states have call successors, (524) [2021-12-06 22:52:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2273 transitions. [2021-12-06 22:52:46,143 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2273 transitions. Word has length 167 [2021-12-06 22:52:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:46,143 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2273 transitions. [2021-12-06 22:52:46,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 5.323529411764706) internal successors, (181), 36 states have internal predecessors, (181), 17 states have call successors, (39), 6 states have call predecessors, (39), 9 states have return successors, (39), 13 states have call predecessors, (39), 16 states have call successors, (39) [2021-12-06 22:52:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2273 transitions. [2021-12-06 22:52:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 22:52:46,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:46,145 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:46,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-06 22:52:46,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:52:46,346 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:52:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:46,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1867080774, now seen corresponding path program 1 times [2021-12-06 22:52:46,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:46,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637252113] [2021-12-06 22:52:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:46,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:52:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:52:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:52:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:52:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:52:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:52:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:52:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:52:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:52:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:52:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:52:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:52:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:52:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:52:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:52:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 22:52:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-06 22:52:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-06 22:52:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-06 22:52:46,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:52:46,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637252113] [2021-12-06 22:52:46,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637252113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:52:46,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:52:46,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 22:52:46,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023563841] [2021-12-06 22:52:46,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:52:46,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:52:46,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:52:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:52:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:52:46,599 INFO L87 Difference]: Start difference. First operand 1811 states and 2273 transitions. Second operand has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-06 22:52:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:47,292 INFO L93 Difference]: Finished difference Result 1861 states and 2334 transitions. [2021-12-06 22:52:47,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:52:47,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 166 [2021-12-06 22:52:47,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:47,296 INFO L225 Difference]: With dead ends: 1861 [2021-12-06 22:52:47,296 INFO L226 Difference]: Without dead ends: 1859 [2021-12-06 22:52:47,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:52:47,297 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 218 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:47,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 1740 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:52:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-12-06 22:52:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1821. [2021-12-06 22:52:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1279 states have (on average 1.0766223612197028) internal successors, (1377), 1294 states have internal predecessors, (1377), 380 states have call successors, (380), 138 states have call predecessors, (380), 161 states have return successors, (526), 388 states have call predecessors, (526), 378 states have call successors, (526) [2021-12-06 22:52:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2283 transitions. [2021-12-06 22:52:47,476 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2283 transitions. Word has length 166 [2021-12-06 22:52:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:47,476 INFO L470 AbstractCegarLoop]: Abstraction has 1821 states and 2283 transitions. [2021-12-06 22:52:47,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-06 22:52:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2283 transitions. [2021-12-06 22:52:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-06 22:52:47,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:47,478 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:47,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-06 22:52:47,478 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:52:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash -481690256, now seen corresponding path program 1 times [2021-12-06 22:52:47,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:47,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428583826] [2021-12-06 22:52:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:47,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:52:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:52:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:52:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:52:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 22:52:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:52:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:52:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 22:52:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 22:52:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:52:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:52:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:52:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:52:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 22:52:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-06 22:52:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:52:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-06 22:52:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 22:52:47,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:52:47,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428583826] [2021-12-06 22:52:47,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428583826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:52:47,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:52:47,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 22:52:47,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681970656] [2021-12-06 22:52:47,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:52:47,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:52:47,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:52:47,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:52:47,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:52:47,696 INFO L87 Difference]: Start difference. First operand 1821 states and 2283 transitions. Second operand has 11 states, 10 states have (on average 7.9) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-06 22:52:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:48,517 INFO L93 Difference]: Finished difference Result 1883 states and 2360 transitions. [2021-12-06 22:52:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 22:52:48,517 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.9) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 170 [2021-12-06 22:52:48,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:48,520 INFO L225 Difference]: With dead ends: 1883 [2021-12-06 22:52:48,520 INFO L226 Difference]: Without dead ends: 1881 [2021-12-06 22:52:48,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:52:48,521 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 140 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:48,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1746 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:52:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-12-06 22:52:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1831. [2021-12-06 22:52:48,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1285 states have (on average 1.0762645914396887) internal successors, (1383), 1300 states have internal predecessors, (1383), 382 states have call successors, (382), 140 states have call predecessors, (382), 163 states have return successors, (528), 390 states have call predecessors, (528), 380 states have call successors, (528) [2021-12-06 22:52:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2293 transitions. [2021-12-06 22:52:48,703 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2293 transitions. Word has length 170 [2021-12-06 22:52:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:48,703 INFO L470 AbstractCegarLoop]: Abstraction has 1831 states and 2293 transitions. [2021-12-06 22:52:48,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.9) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-06 22:52:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2293 transitions. [2021-12-06 22:52:48,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-06 22:52:48,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:48,705 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:48,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-06 22:52:48,705 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:52:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:48,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1044603876, now seen corresponding path program 1 times [2021-12-06 22:52:48,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:48,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816603300] [2021-12-06 22:52:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:48,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:52:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:52:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:52:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:52:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:52:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:52:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:52:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:52:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:52:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:52:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:52:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:52:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:52:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:52:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:52:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:52:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 22:52:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 22:52:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-06 22:52:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-06 22:52:49,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:52:49,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816603300] [2021-12-06 22:52:49,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816603300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:52:49,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028052955] [2021-12-06 22:52:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:49,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:52:49,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:52:49,595 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:52:49,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 22:52:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:49,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 2797 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 22:52:49,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:52:49,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-06 22:52:50,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:52:50,309 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 22:52:50,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2021-12-06 22:52:51,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:52:51,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:52:51,587 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 17 treesize of output 15 [2021-12-06 22:52:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 48 proven. 78 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 22:52:52,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:52:53,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028052955] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:52:53,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:52:53,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 52 [2021-12-06 22:52:53,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336901773] [2021-12-06 22:52:53,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:52:53,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 22:52:53,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:52:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 22:52:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3808, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 22:52:53,678 INFO L87 Difference]: Start difference. First operand 1831 states and 2293 transitions. Second operand has 52 states, 47 states have (on average 4.148936170212766) internal successors, (195), 46 states have internal predecessors, (195), 19 states have call successors, (39), 8 states have call predecessors, (39), 13 states have return successors, (37), 16 states have call predecessors, (37), 18 states have call successors, (37) [2021-12-06 22:52:57,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:57,693 INFO L93 Difference]: Finished difference Result 1993 states and 2498 transitions. [2021-12-06 22:52:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 22:52:57,694 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 47 states have (on average 4.148936170212766) internal successors, (195), 46 states have internal predecessors, (195), 19 states have call successors, (39), 8 states have call predecessors, (39), 13 states have return successors, (37), 16 states have call predecessors, (37), 18 states have call successors, (37) Word has length 169 [2021-12-06 22:52:57,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:57,697 INFO L225 Difference]: With dead ends: 1993 [2021-12-06 22:52:57,697 INFO L226 Difference]: Without dead ends: 1991 [2021-12-06 22:52:57,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 209 SyntacticMatches, 16 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4535 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=750, Invalid=15252, Unknown=0, NotChecked=0, Total=16002 [2021-12-06 22:52:57,699 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 450 mSDsluCounter, 6212 mSDsCounter, 0 mSdLazyCounter, 3340 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 6579 SdHoareTripleChecker+Invalid, 5750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 3340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2129 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:57,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 6579 Invalid, 5750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 3340 Invalid, 0 Unknown, 2129 Unchecked, 1.7s Time] [2021-12-06 22:52:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2021-12-06 22:52:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1836. [2021-12-06 22:52:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1288 states have (on average 1.076086956521739) internal successors, (1386), 1303 states have internal predecessors, (1386), 383 states have call successors, (383), 141 states have call predecessors, (383), 164 states have return successors, (529), 391 states have call predecessors, (529), 381 states have call successors, (529) [2021-12-06 22:52:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2298 transitions. [2021-12-06 22:52:57,887 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2298 transitions. Word has length 169 [2021-12-06 22:52:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:57,887 INFO L470 AbstractCegarLoop]: Abstraction has 1836 states and 2298 transitions. [2021-12-06 22:52:57,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 47 states have (on average 4.148936170212766) internal successors, (195), 46 states have internal predecessors, (195), 19 states have call successors, (39), 8 states have call predecessors, (39), 13 states have return successors, (37), 16 states have call predecessors, (37), 18 states have call successors, (37) [2021-12-06 22:52:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2298 transitions. [2021-12-06 22:52:57,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-06 22:52:57,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:57,889 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:57,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-06 22:52:58,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02fdb0cc-645c-4297-9cde-3bab7d439e57/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-06 22:52:58,091 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:52:58,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:58,092 INFO L85 PathProgramCache]: Analyzing trace with hash -264991735, now seen corresponding path program 1 times [2021-12-06 22:52:58,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:58,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225436403] [2021-12-06 22:52:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:58,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:52:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:52:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:52:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:52:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:52:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 22:52:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:52:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:52:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:52:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:52:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:52:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 22:52:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:52:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 22:52:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:52:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:52:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 22:52:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-06 22:52:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-06 22:52:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 22:52:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 22:52:58,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:52:58,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225436403] [2021-12-06 22:52:58,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225436403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:52:58,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:52:58,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 22:52:58,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626687946] [2021-12-06 22:52:58,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:52:58,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:52:58,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:52:58,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:52:58,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:52:58,403 INFO L87 Difference]: Start difference. First operand 1836 states and 2298 transitions. Second operand has 11 states, 10 states have (on average 6.4) internal successors, (64), 8 states have internal predecessors, (64), 6 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20)