./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/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_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/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_651ed769-affa-4281-b9d8-162c691ce10e/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 f26a5d85d152e590b5f8a93f229efbb28bdd5e77c34d7106bb5825fc4b732cf6 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:22:57,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:22:57,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:22:57,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:22:57,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:22:57,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:22:57,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:22:57,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:22:57,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:22:57,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:22:57,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:22:57,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:22:57,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:22:57,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:22:57,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:22:57,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:22:57,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:22:57,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:22:57,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:22:57,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:22:57,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:22:57,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:22:57,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:22:57,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:22:57,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:22:57,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:22:57,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:22:57,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:22:57,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:22:57,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:22:57,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:22:57,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:22:57,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:22:57,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:22:57,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:22:57,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:22:57,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:22:57,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:22:57,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:22:57,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:22:57,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:22:57,997 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-07 01:22:58,018 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:22:58,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:22:58,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:22:58,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:22:58,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:22:58,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:22:58,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:22:58,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:22:58,026 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:22:58,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:22:58,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:22:58,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:22:58,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:22:58,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:22:58,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:22:58,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:22:58,027 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:22:58,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:22:58,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:22:58,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:22:58,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:22:58,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:22:58,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:22:58,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:22:58,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:22:58,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:22:58,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:22:58,028 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:22:58,028 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:22:58,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:22:58,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:22:58,029 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_651ed769-affa-4281-b9d8-162c691ce10e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f26a5d85d152e590b5f8a93f229efbb28bdd5e77c34d7106bb5825fc4b732cf6 [2021-12-07 01:22:58,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:22:58,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:22:58,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:22:58,224 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:22:58,225 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:22:58,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i [2021-12-07 01:22:58,273 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/data/7d647fae2/2045f1041459414fa16a8dade90807bd/FLAGbab48e881 [2021-12-07 01:22:58,835 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:22:58,835 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i [2021-12-07 01:22:58,858 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/data/7d647fae2/2045f1041459414fa16a8dade90807bd/FLAGbab48e881 [2021-12-07 01:22:59,302 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/data/7d647fae2/2045f1041459414fa16a8dade90807bd [2021-12-07 01:22:59,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:22:59,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:22:59,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:22:59,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:22:59,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:22:59,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:22:59" (1/1) ... [2021-12-07 01:22:59,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12a30bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:59, skipping insertion in model container [2021-12-07 01:22:59,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:22:59" (1/1) ... [2021-12-07 01:22:59,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:22:59,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:22:59,570 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_651ed769-affa-4281-b9d8-162c691ce10e/sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i[4497,4510] [2021-12-07 01:22:59,575 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_651ed769-affa-4281-b9d8-162c691ce10e/sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i[4557,4570] [2021-12-07 01:23:00,270 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,271 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,272 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,272 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,273 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,284 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,284 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,286 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,287 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,594 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 01:23:00,595 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 01:23:00,596 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 01:23:00,596 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 01:23:00,597 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 01:23:00,598 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 01:23:00,598 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 01:23:00,599 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 01:23:00,599 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 01:23:00,599 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 01:23:00,725 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 01:23:00,813 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,814 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:23:00,916 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:23:00,925 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_651ed769-affa-4281-b9d8-162c691ce10e/sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i[4497,4510] [2021-12-07 01:23:00,926 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_651ed769-affa-4281-b9d8-162c691ce10e/sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i[4557,4570] [2021-12-07 01:23:00,949 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,949 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,949 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,950 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,950 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,954 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,954 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,955 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,955 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:00,975 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 01:23:00,976 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 01:23:00,976 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 01:23:00,977 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 01:23:00,977 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 01:23:00,978 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 01:23:00,978 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 01:23:00,978 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 01:23:00,979 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 01:23:00,979 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 01:23:00,992 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 01:23:01,057 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:01,058 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:23:01,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:23:01,280 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:23:01,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:01 WrapperNode [2021-12-07 01:23:01,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:23:01,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:23:01,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:23:01,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:23:01,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:01" (1/1) ... [2021-12-07 01:23:01,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:01" (1/1) ... [2021-12-07 01:23:01,405 INFO L137 Inliner]: procedures = 690, calls = 2642, calls flagged for inlining = 60, calls inlined = 7, statements flattened = 882 [2021-12-07 01:23:01,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:23:01,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:23:01,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:23:01,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:23:01,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:01" (1/1) ... [2021-12-07 01:23:01,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:01" (1/1) ... [2021-12-07 01:23:01,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:01" (1/1) ... [2021-12-07 01:23:01,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:01" (1/1) ... [2021-12-07 01:23:01,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:01" (1/1) ... [2021-12-07 01:23:01,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:01" (1/1) ... [2021-12-07 01:23:01,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:01" (1/1) ... [2021-12-07 01:23:01,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:23:01,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:23:01,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:23:01,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:23:01,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:01" (1/1) ... [2021-12-07 01:23:01,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:23:01,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:01,490 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:23:01,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:23:01,526 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-07 01:23:01,526 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-07 01:23:01,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:23:01,526 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-07 01:23:01,526 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-07 01:23:01,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 01:23:01,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 01:23:01,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 01:23:01,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:23:01,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:23:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:23:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:23:01,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:23:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-07 01:23:01,527 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-07 01:23:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-07 01:23:01,527 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-07 01:23:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 01:23:01,527 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 01:23:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:23:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:23:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:23:01,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 01:23:01,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:23:01,684 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:23:01,686 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:23:02,557 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:23:02,563 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:23:02,563 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-07 01:23:02,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:23:02 BoogieIcfgContainer [2021-12-07 01:23:02,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:23:02,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:23:02,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:23:02,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:23:02,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:22:59" (1/3) ... [2021-12-07 01:23:02,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660dd607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:23:02, skipping insertion in model container [2021-12-07 01:23:02,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:01" (2/3) ... [2021-12-07 01:23:02,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660dd607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:23:02, skipping insertion in model container [2021-12-07 01:23:02,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:23:02" (3/3) ... [2021-12-07 01:23:02,570 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_advance_harness.i [2021-12-07 01:23:02,574 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:23:02,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:23:02,609 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:23:02,613 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 01:23:02,613 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:23:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-07 01:23:02,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 01:23:02,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:02,633 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:02,634 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:02,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1865164224, now seen corresponding path program 1 times [2021-12-07 01:23:02,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:02,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167568434] [2021-12-07 01:23:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:02,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:02,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-07 01:23:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-07 01:23:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-07 01:23:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-07 01:23:03,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:03,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167568434] [2021-12-07 01:23:03,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167568434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:03,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:03,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:23:03,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549057972] [2021-12-07 01:23:03,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:03,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 01:23:03,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:03,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 01:23:03,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:23:03,098 INFO L87 Difference]: Start difference. First operand has 90 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:03,122 INFO L93 Difference]: Finished difference Result 170 states and 243 transitions. [2021-12-07 01:23:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:23:03,123 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-12-07 01:23:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:03,130 INFO L225 Difference]: With dead ends: 170 [2021-12-07 01:23:03,130 INFO L226 Difference]: Without dead ends: 80 [2021-12-07 01:23:03,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:23:03,135 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:03,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-07 01:23:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-07 01:23:03,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 54 states have internal predecessors, (64), 22 states have call successors, (22), 6 states have call predecessors, (22), 5 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-07 01:23:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2021-12-07 01:23:03,170 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 47 [2021-12-07 01:23:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:03,171 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2021-12-07 01:23:03,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:03,172 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2021-12-07 01:23:03,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 01:23:03,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:03,179 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:03,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:23:03,179 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:03,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:03,180 INFO L85 PathProgramCache]: Analyzing trace with hash 866728124, now seen corresponding path program 1 times [2021-12-07 01:23:03,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:03,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93503650] [2021-12-07 01:23:03,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:03,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-07 01:23:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-07 01:23:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-07 01:23:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:23:03,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:03,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93503650] [2021-12-07 01:23:03,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93503650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:03,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389305553] [2021-12-07 01:23:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:03,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:03,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:03,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:03,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:23:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:03,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 2490 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:23:03,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 01:23:03,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:03,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389305553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:03,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:03,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-12-07 01:23:03,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328707226] [2021-12-07 01:23:03,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:03,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:23:03,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:03,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:23:03,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:23:03,900 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:04,042 INFO L93 Difference]: Finished difference Result 146 states and 197 transitions. [2021-12-07 01:23:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:23:04,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-12-07 01:23:04,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:04,044 INFO L225 Difference]: With dead ends: 146 [2021-12-07 01:23:04,044 INFO L226 Difference]: Without dead ends: 83 [2021-12-07 01:23:04,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:23:04,047 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 128 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:04,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 259 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:23:04,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-07 01:23:04,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-07 01:23:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 57 states have internal predecessors, (66), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (23), 19 states have call predecessors, (23), 19 states have call successors, (23) [2021-12-07 01:23:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2021-12-07 01:23:04,062 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 47 [2021-12-07 01:23:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:04,062 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2021-12-07 01:23:04,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:04,063 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2021-12-07 01:23:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 01:23:04,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:04,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:04,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:23:04,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-07 01:23:04,266 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:04,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:04,268 INFO L85 PathProgramCache]: Analyzing trace with hash -912055711, now seen corresponding path program 1 times [2021-12-07 01:23:04,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:04,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738281972] [2021-12-07 01:23:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:04,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:04,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:04,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:04,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:04,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:04,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-07 01:23:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:04,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-07 01:23:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:23:04,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:04,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738281972] [2021-12-07 01:23:04,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738281972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:04,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328696033] [2021-12-07 01:23:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:04,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:04,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:04,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:04,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:23:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:04,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 2495 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 01:23:04,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:23:05,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:05,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328696033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:05,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:05,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-12-07 01:23:05,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965482838] [2021-12-07 01:23:05,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:05,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:23:05,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:23:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:23:05,036 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:05,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:05,156 INFO L93 Difference]: Finished difference Result 141 states and 189 transitions. [2021-12-07 01:23:05,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:23:05,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2021-12-07 01:23:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:05,158 INFO L225 Difference]: With dead ends: 141 [2021-12-07 01:23:05,158 INFO L226 Difference]: Without dead ends: 83 [2021-12-07 01:23:05,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:23:05,160 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 145 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:05,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 257 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:23:05,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-07 01:23:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-07 01:23:05,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 57 states have internal predecessors, (66), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2021-12-07 01:23:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2021-12-07 01:23:05,169 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 49 [2021-12-07 01:23:05,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:05,169 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2021-12-07 01:23:05,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2021-12-07 01:23:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-07 01:23:05,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:05,171 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:05,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:23:05,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:05,373 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:05,374 INFO L85 PathProgramCache]: Analyzing trace with hash -633300053, now seen corresponding path program 1 times [2021-12-07 01:23:05,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:05,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824327517] [2021-12-07 01:23:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:05,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:05,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:05,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:05,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:05,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:05,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:05,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-07 01:23:05,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:05,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824327517] [2021-12-07 01:23:05,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824327517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:05,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:05,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 01:23:05,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904409677] [2021-12-07 01:23:05,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:05,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:23:05,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:05,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:23:05,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:23:05,721 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:23:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:05,773 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2021-12-07 01:23:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:23:05,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 53 [2021-12-07 01:23:05,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:05,775 INFO L225 Difference]: With dead ends: 95 [2021-12-07 01:23:05,776 INFO L226 Difference]: Without dead ends: 93 [2021-12-07 01:23:05,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:23:05,777 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 16 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:05,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 701 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:05,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-07 01:23:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-12-07 01:23:05,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 60 states have (on average 1.2) internal successors, (72), 64 states have internal predecessors, (72), 23 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (27), 20 states have call predecessors, (27), 20 states have call successors, (27) [2021-12-07 01:23:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 122 transitions. [2021-12-07 01:23:05,793 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 122 transitions. Word has length 53 [2021-12-07 01:23:05,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:05,793 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 122 transitions. [2021-12-07 01:23:05,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:23:05,794 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 122 transitions. [2021-12-07 01:23:05,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-07 01:23:05,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:05,797 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:05,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 01:23:05,797 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:05,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1847539699, now seen corresponding path program 1 times [2021-12-07 01:23:05,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:05,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682820923] [2021-12-07 01:23:05,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:05,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:06,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:06,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:06,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:06,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:06,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:06,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:23:06,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:06,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682820923] [2021-12-07 01:23:06,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682820923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:06,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678342109] [2021-12-07 01:23:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:06,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:06,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:06,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:06,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:23:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:06,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 2517 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-07 01:23:06,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:06,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:06,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:07,186 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-07 01:23:07,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-07 01:23:07,281 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:23:07,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 33 [2021-12-07 01:23:07,837 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:23:07,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:23:07,884 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 [2021-12-07 01:23:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:23:08,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:08,305 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_271 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_ArrVal_271) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|))) (<= .cse0 (* 18446744073709551616 (div .cse0 18446744073709551616))))) is different from false [2021-12-07 01:23:08,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678342109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:08,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:23:08,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 33 [2021-12-07 01:23:08,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603174562] [2021-12-07 01:23:08,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:08,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-07 01:23:08,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:08,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-07 01:23:08,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1109, Unknown=1, NotChecked=68, Total=1332 [2021-12-07 01:23:08,375 INFO L87 Difference]: Start difference. First operand 92 states and 122 transitions. Second operand has 33 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 11 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-07 01:23:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:09,790 INFO L93 Difference]: Finished difference Result 331 states and 473 transitions. [2021-12-07 01:23:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-07 01:23:09,791 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 11 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 10 states have call successors, (12) Word has length 57 [2021-12-07 01:23:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:09,795 INFO L225 Difference]: With dead ends: 331 [2021-12-07 01:23:09,795 INFO L226 Difference]: Without dead ends: 266 [2021-12-07 01:23:09,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=299, Invalid=2254, Unknown=1, NotChecked=98, Total=2652 [2021-12-07 01:23:09,797 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 234 mSDsluCounter, 1830 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1976 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 736 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:09,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 1976 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1147 Invalid, 0 Unknown, 736 Unchecked, 0.9s Time] [2021-12-07 01:23:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-07 01:23:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 152. [2021-12-07 01:23:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 111 states have internal predecessors, (129), 32 states have call successors, (32), 13 states have call predecessors, (32), 13 states have return successors, (39), 27 states have call predecessors, (39), 29 states have call successors, (39) [2021-12-07 01:23:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 200 transitions. [2021-12-07 01:23:09,820 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 200 transitions. Word has length 57 [2021-12-07 01:23:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:09,821 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 200 transitions. [2021-12-07 01:23:09,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 11 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-07 01:23:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 200 transitions. [2021-12-07 01:23:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-07 01:23:09,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:09,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:09,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:23:10,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:10,024 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:10,025 INFO L85 PathProgramCache]: Analyzing trace with hash 259191797, now seen corresponding path program 1 times [2021-12-07 01:23:10,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:10,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235563891] [2021-12-07 01:23:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:10,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:10,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:10,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:10,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:10,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:10,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:10,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:23:10,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235563891] [2021-12-07 01:23:10,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235563891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200633915] [2021-12-07 01:23:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:10,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:10,838 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:10,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:23:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:11,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2547 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-07 01:23:11,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:11,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:11,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:12,078 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-12-07 01:23:12,078 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 4 case distinctions, treesize of input 20 treesize of output 30 [2021-12-07 01:23:12,142 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:23:12,143 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 [2021-12-07 01:23:12,411 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:23:12,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:23:12,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 51 [2021-12-07 01:23:12,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:12,514 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 59 treesize of output 52 [2021-12-07 01:23:12,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:12,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:12,522 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2021-12-07 01:23:13,437 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_aws_byte_cursor_advance_~len#1_74| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 01:23:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:23:13,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:13,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:23:13,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2021-12-07 01:23:13,661 WARN L838 $PredicateComparison]: unable to prove that (or |c_ULTIMATE.start_aws_byte_cursor_advance_#t~short1082#1| (forall ((v_arrayElimArr_2 (Array Int Int)) (v_ArrVal_384 Int) (|ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset| Int)) (or (not (= |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1| (select v_arrayElimArr_2 |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset|))) (<= |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1| (let ((.cse0 (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_arrayElimArr_2) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) (+ 8 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|) v_ArrVal_384) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|))) (+ (* 18446744073709551616 (div (+ |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1| (* .cse0 (- 1))) 18446744073709551616)) .cse0)))))) is different from false [2021-12-07 01:23:13,685 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_2 (Array Int Int)) (v_ArrVal_384 Int) (|ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset| Int)) (let ((.cse0 (select v_arrayElimArr_2 |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset|))) (or (< (mod (select (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|) 18446744073709551616) (mod .cse0 18446744073709551616)) (<= .cse0 (let ((.cse1 (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_arrayElimArr_2) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) (+ 8 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|) v_ArrVal_384) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|))) (+ (* 18446744073709551616 (div (+ .cse0 (* .cse1 (- 1))) 18446744073709551616)) .cse1)))))) is different from false [2021-12-07 01:23:13,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200633915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:13,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:23:13,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-12-07 01:23:13,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194151835] [2021-12-07 01:23:13,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:13,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 01:23:13,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:13,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 01:23:13,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1058, Unknown=2, NotChecked=134, Total=1332 [2021-12-07 01:23:13,874 INFO L87 Difference]: Start difference. First operand 152 states and 200 transitions. Second operand has 32 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 30 states have internal predecessors, (77), 11 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (12), 7 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-07 01:23:17,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 01:23:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:24,421 INFO L93 Difference]: Finished difference Result 388 states and 586 transitions. [2021-12-07 01:23:24,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-07 01:23:24,422 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 30 states have internal predecessors, (77), 11 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (12), 7 states have call predecessors, (12), 10 states have call successors, (12) Word has length 57 [2021-12-07 01:23:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:24,424 INFO L225 Difference]: With dead ends: 388 [2021-12-07 01:23:24,424 INFO L226 Difference]: Without dead ends: 297 [2021-12-07 01:23:24,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 63 SyntacticMatches, 13 SemanticMatches, 69 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=589, Invalid=4107, Unknown=4, NotChecked=270, Total=4970 [2021-12-07 01:23:24,427 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 233 mSDsluCounter, 2397 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 2617 SdHoareTripleChecker+Invalid, 3527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1186 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:24,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 2617 Invalid, 3527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 1998 Invalid, 0 Unknown, 1186 Unchecked, 4.0s Time] [2021-12-07 01:23:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-07 01:23:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 139. [2021-12-07 01:23:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 99 states have internal predecessors, (113), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (36), 26 states have call predecessors, (36), 28 states have call successors, (36) [2021-12-07 01:23:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 180 transitions. [2021-12-07 01:23:24,457 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 180 transitions. Word has length 57 [2021-12-07 01:23:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:24,457 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 180 transitions. [2021-12-07 01:23:24,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 30 states have internal predecessors, (77), 11 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (12), 7 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-07 01:23:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 180 transitions. [2021-12-07 01:23:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-07 01:23:24,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:24,459 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:24,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:23:24,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:24,660 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:24,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:24,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1118956732, now seen corresponding path program 1 times [2021-12-07 01:23:24,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:24,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717415020] [2021-12-07 01:23:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:24,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:24,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:24,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:24,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:24,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:24,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:24,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:24,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:24,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:23:24,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:24,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717415020] [2021-12-07 01:23:24,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717415020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:24,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:24,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:23:24,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046016769] [2021-12-07 01:23:24,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:24,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:23:24,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:23:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:23:24,868 INFO L87 Difference]: Start difference. First operand 139 states and 180 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:23:24,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:24,910 INFO L93 Difference]: Finished difference Result 189 states and 243 transitions. [2021-12-07 01:23:24,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:23:24,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2021-12-07 01:23:24,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:24,912 INFO L225 Difference]: With dead ends: 189 [2021-12-07 01:23:24,912 INFO L226 Difference]: Without dead ends: 139 [2021-12-07 01:23:24,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:23:24,913 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 17 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:24,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 366 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:24,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-07 01:23:24,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-07 01:23:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 99 states have internal predecessors, (113), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (35), 26 states have call predecessors, (35), 28 states have call successors, (35) [2021-12-07 01:23:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 179 transitions. [2021-12-07 01:23:24,923 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 179 transitions. Word has length 65 [2021-12-07 01:23:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:24,923 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 179 transitions. [2021-12-07 01:23:24,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:23:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 179 transitions. [2021-12-07 01:23:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-07 01:23:24,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:24,924 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 01:23:24,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 01:23:24,924 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:24,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1358669827, now seen corresponding path program 1 times [2021-12-07 01:23:24,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:24,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556903866] [2021-12-07 01:23:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:24,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-07 01:23:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-07 01:23:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:23:25,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:25,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556903866] [2021-12-07 01:23:25,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556903866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:25,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346328978] [2021-12-07 01:23:25,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:25,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:25,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:25,116 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:25,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:23:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 2541 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:23:25,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:23:25,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:25,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346328978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:25,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:25,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-12-07 01:23:25,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311428616] [2021-12-07 01:23:25,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:25,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:23:25,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:23:25,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:23:25,435 INFO L87 Difference]: Start difference. First operand 139 states and 179 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:25,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:25,500 INFO L93 Difference]: Finished difference Result 227 states and 302 transitions. [2021-12-07 01:23:25,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:23:25,500 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2021-12-07 01:23:25,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:25,502 INFO L225 Difference]: With dead ends: 227 [2021-12-07 01:23:25,502 INFO L226 Difference]: Without dead ends: 144 [2021-12-07 01:23:25,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:23:25,503 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 12 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:25,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 798 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:25,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-07 01:23:25,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-12-07 01:23:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 99 states have (on average 1.1818181818181819) internal successors, (117), 104 states have internal predecessors, (117), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (39), 26 states have call predecessors, (39), 28 states have call successors, (39) [2021-12-07 01:23:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 187 transitions. [2021-12-07 01:23:25,513 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 187 transitions. Word has length 65 [2021-12-07 01:23:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:25,514 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 187 transitions. [2021-12-07 01:23:25,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 187 transitions. [2021-12-07 01:23:25,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-07 01:23:25,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:25,515 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:25,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:23:25,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:25,716 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:25,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1635963807, now seen corresponding path program 1 times [2021-12-07 01:23:25,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:25,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150918251] [2021-12-07 01:23:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:25,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 01:23:25,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150918251] [2021-12-07 01:23:25,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150918251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:25,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:25,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 01:23:25,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626409398] [2021-12-07 01:23:25,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:25,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:23:25,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:23:25,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:23:25,904 INFO L87 Difference]: Start difference. First operand 144 states and 187 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-07 01:23:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:25,955 INFO L93 Difference]: Finished difference Result 152 states and 195 transitions. [2021-12-07 01:23:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:23:25,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 67 [2021-12-07 01:23:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:25,957 INFO L225 Difference]: With dead ends: 152 [2021-12-07 01:23:25,957 INFO L226 Difference]: Without dead ends: 150 [2021-12-07 01:23:25,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:23:25,958 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 16 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:25,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 699 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:25,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-07 01:23:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-12-07 01:23:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 107 states have internal predecessors, (120), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (40), 27 states have call predecessors, (40), 29 states have call successors, (40) [2021-12-07 01:23:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 192 transitions. [2021-12-07 01:23:25,969 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 192 transitions. Word has length 67 [2021-12-07 01:23:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:25,969 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 192 transitions. [2021-12-07 01:23:25,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-07 01:23:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 192 transitions. [2021-12-07 01:23:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-07 01:23:25,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:25,970 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:25,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-07 01:23:25,971 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:25,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2085590904, now seen corresponding path program 1 times [2021-12-07 01:23:25,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:25,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574923892] [2021-12-07 01:23:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:25,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:26,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:26,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:26,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-07 01:23:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:26,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-07 01:23:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:26,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-07 01:23:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:26,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-07 01:23:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:23:26,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574923892] [2021-12-07 01:23:26,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574923892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056514102] [2021-12-07 01:23:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:26,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:26,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:26,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:26,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:23:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:26,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 01:23:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:23:26,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:26,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056514102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:26,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:26,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-12-07 01:23:26,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692501901] [2021-12-07 01:23:26,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:26,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:23:26,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:26,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:23:26,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:23:26,553 INFO L87 Difference]: Start difference. First operand 149 states and 192 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:26,717 INFO L93 Difference]: Finished difference Result 242 states and 324 transitions. [2021-12-07 01:23:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:23:26,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2021-12-07 01:23:26,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:26,719 INFO L225 Difference]: With dead ends: 242 [2021-12-07 01:23:26,719 INFO L226 Difference]: Without dead ends: 149 [2021-12-07 01:23:26,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:23:26,720 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 17 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:26,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 328 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-12-07 01:23:26,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-07 01:23:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-12-07 01:23:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 107 states have internal predecessors, (119), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (40), 27 states have call predecessors, (40), 29 states have call successors, (40) [2021-12-07 01:23:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 191 transitions. [2021-12-07 01:23:26,732 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 191 transitions. Word has length 67 [2021-12-07 01:23:26,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:26,732 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 191 transitions. [2021-12-07 01:23:26,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 191 transitions. [2021-12-07 01:23:26,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-07 01:23:26,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:26,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:26,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:23:26,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:26,936 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:26,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:26,937 INFO L85 PathProgramCache]: Analyzing trace with hash 180790282, now seen corresponding path program 1 times [2021-12-07 01:23:26,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:26,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454108152] [2021-12-07 01:23:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:26,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:27,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:27,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:27,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-07 01:23:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:27,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-07 01:23:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:27,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-07 01:23:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:27,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-07 01:23:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:23:27,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:27,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454108152] [2021-12-07 01:23:27,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454108152] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:27,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831273499] [2021-12-07 01:23:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:27,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:27,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:27,200 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:27,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:23:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:27,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 2551 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:23:27,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-07 01:23:27,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:27,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831273499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:27,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:27,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-12-07 01:23:27,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922901779] [2021-12-07 01:23:27,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:27,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:23:27,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:27,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:23:27,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:23:27,527 INFO L87 Difference]: Start difference. First operand 149 states and 191 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:27,599 INFO L93 Difference]: Finished difference Result 222 states and 286 transitions. [2021-12-07 01:23:27,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:23:27,600 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 67 [2021-12-07 01:23:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:27,601 INFO L225 Difference]: With dead ends: 222 [2021-12-07 01:23:27,601 INFO L226 Difference]: Without dead ends: 149 [2021-12-07 01:23:27,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:23:27,602 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 11 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:27,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 783 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:27,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-07 01:23:27,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-12-07 01:23:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 107 states have internal predecessors, (119), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (39), 27 states have call predecessors, (39), 29 states have call successors, (39) [2021-12-07 01:23:27,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 190 transitions. [2021-12-07 01:23:27,612 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 190 transitions. Word has length 67 [2021-12-07 01:23:27,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:27,612 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 190 transitions. [2021-12-07 01:23:27,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:27,612 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 190 transitions. [2021-12-07 01:23:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-07 01:23:27,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:27,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:27,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:23:27,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:27,814 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:27,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:27,814 INFO L85 PathProgramCache]: Analyzing trace with hash -999155823, now seen corresponding path program 2 times [2021-12-07 01:23:27,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:27,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435346037] [2021-12-07 01:23:27,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:27,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:28,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:28,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:28,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-07 01:23:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:28,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-07 01:23:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:28,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:28,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:23:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-07 01:23:28,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:28,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435346037] [2021-12-07 01:23:28,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435346037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:28,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919520379] [2021-12-07 01:23:28,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:23:28,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:28,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:28,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:28,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:23:28,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:23:28,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:23:28,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-07 01:23:28,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:28,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:23:28,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:23:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:23:29,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:29,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919520379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:29,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:29,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 24 [2021-12-07 01:23:29,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347079627] [2021-12-07 01:23:29,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:29,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 01:23:29,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 01:23:29,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:23:29,298 INFO L87 Difference]: Start difference. First operand 149 states and 190 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:29,454 INFO L93 Difference]: Finished difference Result 298 states and 407 transitions. [2021-12-07 01:23:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:23:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 69 [2021-12-07 01:23:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:29,455 INFO L225 Difference]: With dead ends: 298 [2021-12-07 01:23:29,455 INFO L226 Difference]: Without dead ends: 196 [2021-12-07 01:23:29,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-12-07 01:23:29,457 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 44 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:29,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 818 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2021-12-07 01:23:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-07 01:23:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 150. [2021-12-07 01:23:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 108 states have internal predecessors, (120), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (39), 27 states have call predecessors, (39), 29 states have call successors, (39) [2021-12-07 01:23:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 191 transitions. [2021-12-07 01:23:29,468 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 191 transitions. Word has length 69 [2021-12-07 01:23:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:29,468 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 191 transitions. [2021-12-07 01:23:29,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:23:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 191 transitions. [2021-12-07 01:23:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-07 01:23:29,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:29,469 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:29,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:23:29,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 01:23:29,671 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash -958481073, now seen corresponding path program 1 times [2021-12-07 01:23:29,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:29,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648907401] [2021-12-07 01:23:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:29,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-07 01:23:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-07 01:23:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:23:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-07 01:23:29,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:29,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648907401] [2021-12-07 01:23:29,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648907401] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:29,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182356022] [2021-12-07 01:23:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:29,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:29,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:29,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:29,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:23:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 2556 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:23:30,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-07 01:23:30,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:30,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182356022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:30,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:30,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-07 01:23:30,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441394567] [2021-12-07 01:23:30,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:30,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:23:30,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:23:30,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:23:30,125 INFO L87 Difference]: Start difference. First operand 150 states and 191 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:30,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:30,146 INFO L93 Difference]: Finished difference Result 248 states and 326 transitions. [2021-12-07 01:23:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:23:30,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 69 [2021-12-07 01:23:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:30,147 INFO L225 Difference]: With dead ends: 248 [2021-12-07 01:23:30,147 INFO L226 Difference]: Without dead ends: 154 [2021-12-07 01:23:30,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:23:30,148 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 9 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:30,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 300 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-07 01:23:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2021-12-07 01:23:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 104 states have (on average 1.1538461538461537) internal successors, (120), 109 states have internal predecessors, (120), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (38), 27 states have call predecessors, (38), 29 states have call successors, (38) [2021-12-07 01:23:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 190 transitions. [2021-12-07 01:23:30,159 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 190 transitions. Word has length 69 [2021-12-07 01:23:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:30,159 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 190 transitions. [2021-12-07 01:23:30,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 190 transitions. [2021-12-07 01:23:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-07 01:23:30,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:30,160 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:30,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 01:23:30,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-07 01:23:30,361 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:30,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1153679959, now seen corresponding path program 1 times [2021-12-07 01:23:30,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:30,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133503100] [2021-12-07 01:23:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:30,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:23:30,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:30,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133503100] [2021-12-07 01:23:30,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133503100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:30,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:30,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 01:23:30,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140430654] [2021-12-07 01:23:30,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:30,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:23:30,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:30,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:23:30,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:23:30,516 INFO L87 Difference]: Start difference. First operand 151 states and 190 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:23:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:30,676 INFO L93 Difference]: Finished difference Result 216 states and 277 transitions. [2021-12-07 01:23:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:23:30,677 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2021-12-07 01:23:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:30,678 INFO L225 Difference]: With dead ends: 216 [2021-12-07 01:23:30,678 INFO L226 Difference]: Without dead ends: 159 [2021-12-07 01:23:30,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:23:30,679 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 40 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:30,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 378 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:23:30,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-07 01:23:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2021-12-07 01:23:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 112 states have internal predecessors, (121), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (45), 30 states have call predecessors, (45), 34 states have call successors, (45) [2021-12-07 01:23:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 203 transitions. [2021-12-07 01:23:30,689 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 203 transitions. Word has length 71 [2021-12-07 01:23:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:30,690 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 203 transitions. [2021-12-07 01:23:30,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:23:30,690 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 203 transitions. [2021-12-07 01:23:30,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-07 01:23:30,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:30,691 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:30,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 01:23:30,691 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:30,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:30,692 INFO L85 PathProgramCache]: Analyzing trace with hash -452080085, now seen corresponding path program 1 times [2021-12-07 01:23:30,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:30,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894785761] [2021-12-07 01:23:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:30,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:23:31,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:31,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894785761] [2021-12-07 01:23:31,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894785761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:31,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037814862] [2021-12-07 01:23:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:31,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:31,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:31,145 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:31,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 01:23:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:31,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2579 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-07 01:23:31,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:31,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:31,970 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 46 treesize of output 30 [2021-12-07 01:23:32,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-12-07 01:23:32,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-07 01:23:32,069 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:23:32,069 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 55 treesize of output 55 [2021-12-07 01:23:32,100 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 21 treesize of output 17 [2021-12-07 01:23:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:23:32,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:33,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:23:33,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2021-12-07 01:23:33,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:23:33,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-07 01:23:33,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-12-07 01:23:33,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:23:33,204 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 24 treesize of output 26 [2021-12-07 01:23:33,512 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 28 treesize of output 24 [2021-12-07 01:23:33,515 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 [2021-12-07 01:23:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 01:23:33,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037814862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:23:33,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:23:33,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 34 [2021-12-07 01:23:33,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427612341] [2021-12-07 01:23:33,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:33,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 01:23:33,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:33,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 01:23:33,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 01:23:33,532 INFO L87 Difference]: Start difference. First operand 157 states and 203 transitions. Second operand has 34 states, 30 states have (on average 2.966666666666667) internal successors, (89), 34 states have internal predecessors, (89), 12 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (20), 7 states have call predecessors, (20), 11 states have call successors, (20) [2021-12-07 01:23:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:35,732 INFO L93 Difference]: Finished difference Result 378 states and 522 transitions. [2021-12-07 01:23:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 01:23:35,732 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 2.966666666666667) internal successors, (89), 34 states have internal predecessors, (89), 12 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (20), 7 states have call predecessors, (20), 11 states have call successors, (20) Word has length 71 [2021-12-07 01:23:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:35,734 INFO L225 Difference]: With dead ends: 378 [2021-12-07 01:23:35,734 INFO L226 Difference]: Without dead ends: 271 [2021-12-07 01:23:35,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 126 SyntacticMatches, 23 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=391, Invalid=2915, Unknown=0, NotChecked=0, Total=3306 [2021-12-07 01:23:35,736 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 267 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:35,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1767 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1593 Invalid, 0 Unknown, 286 Unchecked, 1.4s Time] [2021-12-07 01:23:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-07 01:23:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 200. [2021-12-07 01:23:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 137 states have (on average 1.1532846715328466) internal successors, (158), 144 states have internal predecessors, (158), 43 states have call successors, (43), 18 states have call predecessors, (43), 19 states have return successors, (54), 37 states have call predecessors, (54), 40 states have call successors, (54) [2021-12-07 01:23:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 255 transitions. [2021-12-07 01:23:35,751 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 255 transitions. Word has length 71 [2021-12-07 01:23:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:35,751 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 255 transitions. [2021-12-07 01:23:35,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 2.966666666666667) internal successors, (89), 34 states have internal predecessors, (89), 12 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (20), 7 states have call predecessors, (20), 11 states have call successors, (20) [2021-12-07 01:23:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 255 transitions. [2021-12-07 01:23:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-07 01:23:35,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:35,753 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:35,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 01:23:35,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 01:23:35,954 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:35,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1701555945, now seen corresponding path program 1 times [2021-12-07 01:23:35,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:35,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436737968] [2021-12-07 01:23:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:35,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:23:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 01:23:36,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:36,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436737968] [2021-12-07 01:23:36,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436737968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:36,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:36,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:23:36,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386709314] [2021-12-07 01:23:36,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:36,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:23:36,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:36,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:23:36,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:23:36,134 INFO L87 Difference]: Start difference. First operand 200 states and 255 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-07 01:23:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:36,163 INFO L93 Difference]: Finished difference Result 226 states and 288 transitions. [2021-12-07 01:23:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:23:36,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 80 [2021-12-07 01:23:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:36,164 INFO L225 Difference]: With dead ends: 226 [2021-12-07 01:23:36,164 INFO L226 Difference]: Without dead ends: 197 [2021-12-07 01:23:36,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:23:36,165 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 27 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:36,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 339 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-07 01:23:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2021-12-07 01:23:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 130 states have (on average 1.1384615384615384) internal successors, (148), 137 states have internal predecessors, (148), 41 states have call successors, (41), 17 states have call predecessors, (41), 18 states have return successors, (51), 35 states have call predecessors, (51), 38 states have call successors, (51) [2021-12-07 01:23:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 240 transitions. [2021-12-07 01:23:36,179 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 240 transitions. Word has length 80 [2021-12-07 01:23:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:36,179 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 240 transitions. [2021-12-07 01:23:36,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-07 01:23:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 240 transitions. [2021-12-07 01:23:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-07 01:23:36,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:36,181 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:36,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-07 01:23:36,181 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1390033412, now seen corresponding path program 1 times [2021-12-07 01:23:36,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:36,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987249759] [2021-12-07 01:23:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:36,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:23:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-07 01:23:36,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:36,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987249759] [2021-12-07 01:23:36,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987249759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:36,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:36,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 01:23:36,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107489965] [2021-12-07 01:23:36,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:36,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:23:36,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:36,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:23:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:23:36,336 INFO L87 Difference]: Start difference. First operand 190 states and 240 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-07 01:23:36,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:36,382 INFO L93 Difference]: Finished difference Result 198 states and 248 transitions. [2021-12-07 01:23:36,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:23:36,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 82 [2021-12-07 01:23:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:36,383 INFO L225 Difference]: With dead ends: 198 [2021-12-07 01:23:36,383 INFO L226 Difference]: Without dead ends: 196 [2021-12-07 01:23:36,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:23:36,384 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 15 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:36,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 680 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-07 01:23:36,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-12-07 01:23:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 133 states have (on average 1.1353383458646618) internal successors, (151), 140 states have internal predecessors, (151), 42 states have call successors, (42), 18 states have call predecessors, (42), 19 states have return successors, (52), 36 states have call predecessors, (52), 39 states have call successors, (52) [2021-12-07 01:23:36,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 245 transitions. [2021-12-07 01:23:36,397 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 245 transitions. Word has length 82 [2021-12-07 01:23:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:36,397 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 245 transitions. [2021-12-07 01:23:36,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-07 01:23:36,398 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 245 transitions. [2021-12-07 01:23:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-07 01:23:36,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:36,399 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:36,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-07 01:23:36,399 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:36,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:36,399 INFO L85 PathProgramCache]: Analyzing trace with hash 716152983, now seen corresponding path program 1 times [2021-12-07 01:23:36,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:36,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595893018] [2021-12-07 01:23:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:36,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:23:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:23:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:23:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:23:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-07 01:23:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-07 01:23:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:23:36,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:36,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595893018] [2021-12-07 01:23:36,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595893018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:36,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785470507] [2021-12-07 01:23:36,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:36,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:36,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:36,774 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:36,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 01:23:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:37,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-07 01:23:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:37,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:23:37,606 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 17 treesize of output 9 [2021-12-07 01:23:37,608 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 [2021-12-07 01:23:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:23:37,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:37,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785470507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:37,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:37,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15] total 28 [2021-12-07 01:23:37,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345384881] [2021-12-07 01:23:37,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:37,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 01:23:37,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:37,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 01:23:37,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:23:37,653 INFO L87 Difference]: Start difference. First operand 195 states and 245 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 11 states have internal predecessors, (54), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 01:23:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:37,847 INFO L93 Difference]: Finished difference Result 383 states and 486 transitions. [2021-12-07 01:23:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:23:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 11 states have internal predecessors, (54), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 80 [2021-12-07 01:23:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:37,850 INFO L225 Difference]: With dead ends: 383 [2021-12-07 01:23:37,850 INFO L226 Difference]: Without dead ends: 250 [2021-12-07 01:23:37,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-12-07 01:23:37,852 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 45 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:37,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1054 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2021-12-07 01:23:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-07 01:23:37,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 220. [2021-12-07 01:23:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 154 states have (on average 1.1233766233766234) internal successors, (173), 162 states have internal predecessors, (173), 42 states have call successors, (42), 21 states have call predecessors, (42), 23 states have return successors, (52), 36 states have call predecessors, (52), 39 states have call successors, (52) [2021-12-07 01:23:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 267 transitions. [2021-12-07 01:23:37,874 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 267 transitions. Word has length 80 [2021-12-07 01:23:37,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:37,874 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 267 transitions. [2021-12-07 01:23:37,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 11 states have internal predecessors, (54), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-07 01:23:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 267 transitions. [2021-12-07 01:23:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-07 01:23:37,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:37,876 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:37,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 01:23:38,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 01:23:38,077 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:38,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1172549180, now seen corresponding path program 1 times [2021-12-07 01:23:38,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:38,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537399670] [2021-12-07 01:23:38,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:38,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:23:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 01:23:38,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:38,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537399670] [2021-12-07 01:23:38,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537399670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:38,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:38,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-07 01:23:38,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195416853] [2021-12-07 01:23:38,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:38,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:23:38,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:38,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:23:38,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:23:38,290 INFO L87 Difference]: Start difference. First operand 220 states and 267 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:23:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:38,543 INFO L93 Difference]: Finished difference Result 272 states and 342 transitions. [2021-12-07 01:23:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:23:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 86 [2021-12-07 01:23:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:38,545 INFO L225 Difference]: With dead ends: 272 [2021-12-07 01:23:38,545 INFO L226 Difference]: Without dead ends: 246 [2021-12-07 01:23:38,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:23:38,546 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 65 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:38,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 532 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:23:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-07 01:23:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 229. [2021-12-07 01:23:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 157 states have (on average 1.1210191082802548) internal successors, (176), 167 states have internal predecessors, (176), 48 states have call successors, (48), 21 states have call predecessors, (48), 23 states have return successors, (58), 40 states have call predecessors, (58), 45 states have call successors, (58) [2021-12-07 01:23:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2021-12-07 01:23:38,563 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 86 [2021-12-07 01:23:38,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:38,563 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2021-12-07 01:23:38,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:23:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2021-12-07 01:23:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-07 01:23:38,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:38,565 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:38,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-07 01:23:38,565 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash 755723522, now seen corresponding path program 1 times [2021-12-07 01:23:38,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:38,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864645727] [2021-12-07 01:23:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:38,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:23:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-07 01:23:38,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864645727] [2021-12-07 01:23:38,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864645727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817048461] [2021-12-07 01:23:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:38,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:38,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:38,858 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:38,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 01:23:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:39,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 2625 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-07 01:23:39,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:23:40,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:40,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817048461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:40,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:23:40,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-12-07 01:23:40,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491328349] [2021-12-07 01:23:40,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:40,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:23:40,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:40,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:23:40,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:23:40,422 INFO L87 Difference]: Start difference. First operand 229 states and 282 transitions. Second operand has 21 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 8 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-07 01:23:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:40,957 INFO L93 Difference]: Finished difference Result 311 states and 376 transitions. [2021-12-07 01:23:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 01:23:40,957 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 8 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 86 [2021-12-07 01:23:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:40,959 INFO L225 Difference]: With dead ends: 311 [2021-12-07 01:23:40,959 INFO L226 Difference]: Without dead ends: 241 [2021-12-07 01:23:40,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:23:40,960 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 81 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:40,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1063 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 297 Invalid, 0 Unknown, 196 Unchecked, 0.3s Time] [2021-12-07 01:23:40,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-07 01:23:40,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2021-12-07 01:23:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 160 states have (on average 1.11875) internal successors, (179), 169 states have internal predecessors, (179), 47 states have call successors, (47), 22 states have call predecessors, (47), 23 states have return successors, (57), 39 states have call predecessors, (57), 44 states have call successors, (57) [2021-12-07 01:23:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 283 transitions. [2021-12-07 01:23:40,977 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 283 transitions. Word has length 86 [2021-12-07 01:23:40,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:40,977 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 283 transitions. [2021-12-07 01:23:40,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 8 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-07 01:23:40,977 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 283 transitions. [2021-12-07 01:23:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 01:23:40,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:40,978 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:40,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 01:23:41,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:41,179 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:41,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:41,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1314150920, now seen corresponding path program 1 times [2021-12-07 01:23:41,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:41,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367853060] [2021-12-07 01:23:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:41,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:23:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:23:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:23:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:23:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:23:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-07 01:23:41,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:41,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367853060] [2021-12-07 01:23:41,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367853060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:41,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726032421] [2021-12-07 01:23:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:41,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:41,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:41,905 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:41,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 01:23:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:42,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-07 01:23:42,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:42,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:42,335 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:23:42,336 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 [2021-12-07 01:23:42,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:23:42,895 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-12-07 01:23:42,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 34 treesize of output 53 [2021-12-07 01:23:43,012 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 [2021-12-07 01:23:43,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-07 01:23:43,557 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-12-07 01:23:43,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 32 treesize of output 57 [2021-12-07 01:23:45,457 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-12-07 01:23:45,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2021-12-07 01:23:45,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:23:45,505 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 17 treesize of output 19 [2021-12-07 01:23:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:23:45,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:46,120 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1315 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_ArrVal_1315) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) (+ 8 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|)) 0))) (forall ((v_ArrVal_1316 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_ArrVal_1316) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) (+ 8 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|)) 0)))) is different from false [2021-12-07 01:23:46,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726032421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:46,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:23:46,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28] total 45 [2021-12-07 01:23:46,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014868589] [2021-12-07 01:23:46,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:46,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-07 01:23:46,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:46,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-07 01:23:46,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2320, Unknown=1, NotChecked=98, Total=2652 [2021-12-07 01:23:46,194 INFO L87 Difference]: Start difference. First operand 231 states and 283 transitions. Second operand has 45 states, 41 states have (on average 2.926829268292683) internal successors, (120), 40 states have internal predecessors, (120), 13 states have call successors, (19), 9 states have call predecessors, (19), 10 states have return successors, (18), 10 states have call predecessors, (18), 12 states have call successors, (18) [2021-12-07 01:23:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:55,507 INFO L93 Difference]: Finished difference Result 483 states and 613 transitions. [2021-12-07 01:23:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-07 01:23:55,507 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.926829268292683) internal successors, (120), 40 states have internal predecessors, (120), 13 states have call successors, (19), 9 states have call predecessors, (19), 10 states have return successors, (18), 10 states have call predecessors, (18), 12 states have call successors, (18) Word has length 87 [2021-12-07 01:23:55,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:55,509 INFO L225 Difference]: With dead ends: 483 [2021-12-07 01:23:55,509 INFO L226 Difference]: Without dead ends: 371 [2021-12-07 01:23:55,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2942 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=661, Invalid=7523, Unknown=10, NotChecked=178, Total=8372 [2021-12-07 01:23:55,512 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 220 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 2322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 948 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:55,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 1498 Invalid, 2322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1279 Invalid, 0 Unknown, 948 Unchecked, 0.8s Time] [2021-12-07 01:23:55,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-07 01:23:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 258. [2021-12-07 01:23:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 184 states have (on average 1.125) internal successors, (207), 193 states have internal predecessors, (207), 47 states have call successors, (47), 25 states have call predecessors, (47), 26 states have return successors, (54), 39 states have call predecessors, (54), 44 states have call successors, (54) [2021-12-07 01:23:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 308 transitions. [2021-12-07 01:23:55,533 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 308 transitions. Word has length 87 [2021-12-07 01:23:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:55,533 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 308 transitions. [2021-12-07 01:23:55,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.926829268292683) internal successors, (120), 40 states have internal predecessors, (120), 13 states have call successors, (19), 9 states have call predecessors, (19), 10 states have return successors, (18), 10 states have call predecessors, (18), 12 states have call successors, (18) [2021-12-07 01:23:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 308 transitions. [2021-12-07 01:23:55,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 01:23:55,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:55,534 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-07 01:23:55,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 01:23:55,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:55,735 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:55,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1572316358, now seen corresponding path program 1 times [2021-12-07 01:23:55,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:55,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072666494] [2021-12-07 01:23:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:55,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:55,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:55,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:23:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:55,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:23:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:55,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:23:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:55,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:23:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:55,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:23:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:55,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:55,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:55,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:23:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-07 01:23:55,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:55,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072666494] [2021-12-07 01:23:55,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072666494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:55,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:55,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:23:55,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136646886] [2021-12-07 01:23:55,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:55,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:23:55,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:55,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:23:55,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:23:55,945 INFO L87 Difference]: Start difference. First operand 258 states and 308 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-07 01:23:56,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:56,100 INFO L93 Difference]: Finished difference Result 356 states and 430 transitions. [2021-12-07 01:23:56,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:23:56,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 87 [2021-12-07 01:23:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:56,101 INFO L225 Difference]: With dead ends: 356 [2021-12-07 01:23:56,102 INFO L226 Difference]: Without dead ends: 256 [2021-12-07 01:23:56,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:23:56,103 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 36 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:56,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 252 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:23:56,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-07 01:23:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-12-07 01:23:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 182 states have (on average 1.10989010989011) internal successors, (202), 191 states have internal predecessors, (202), 47 states have call successors, (47), 25 states have call predecessors, (47), 26 states have return successors, (54), 39 states have call predecessors, (54), 44 states have call successors, (54) [2021-12-07 01:23:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 303 transitions. [2021-12-07 01:23:56,121 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 303 transitions. Word has length 87 [2021-12-07 01:23:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:56,121 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 303 transitions. [2021-12-07 01:23:56,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-07 01:23:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 303 transitions. [2021-12-07 01:23:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-07 01:23:56,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:56,122 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:56,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-07 01:23:56,122 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:56,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:56,122 INFO L85 PathProgramCache]: Analyzing trace with hash -253022058, now seen corresponding path program 1 times [2021-12-07 01:23:56,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:56,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154477412] [2021-12-07 01:23:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:56,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:23:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:23:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-07 01:23:56,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:56,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154477412] [2021-12-07 01:23:56,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154477412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:56,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:56,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:23:56,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585074352] [2021-12-07 01:23:56,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:56,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:23:56,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:56,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:23:56,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:23:56,242 INFO L87 Difference]: Start difference. First operand 256 states and 303 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-07 01:23:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:56,262 INFO L93 Difference]: Finished difference Result 270 states and 320 transitions. [2021-12-07 01:23:56,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:23:56,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 90 [2021-12-07 01:23:56,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:56,264 INFO L225 Difference]: With dead ends: 270 [2021-12-07 01:23:56,264 INFO L226 Difference]: Without dead ends: 257 [2021-12-07 01:23:56,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:23:56,265 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:56,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-07 01:23:56,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2021-12-07 01:23:56,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 183 states have (on average 1.1092896174863387) internal successors, (203), 192 states have internal predecessors, (203), 47 states have call successors, (47), 25 states have call predecessors, (47), 26 states have return successors, (54), 39 states have call predecessors, (54), 44 states have call successors, (54) [2021-12-07 01:23:56,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 304 transitions. [2021-12-07 01:23:56,284 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 304 transitions. Word has length 90 [2021-12-07 01:23:56,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:56,284 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 304 transitions. [2021-12-07 01:23:56,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-07 01:23:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 304 transitions. [2021-12-07 01:23:56,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-07 01:23:56,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:56,285 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:56,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-07 01:23:56,286 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:56,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:56,286 INFO L85 PathProgramCache]: Analyzing trace with hash -266130098, now seen corresponding path program 1 times [2021-12-07 01:23:56,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:56,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448128847] [2021-12-07 01:23:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:56,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:23:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:23:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-07 01:23:56,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:56,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448128847] [2021-12-07 01:23:56,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448128847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:56,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:56,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 01:23:56,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416733716] [2021-12-07 01:23:56,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:56,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:23:56,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:56,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:23:56,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:23:56,451 INFO L87 Difference]: Start difference. First operand 257 states and 304 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-07 01:23:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:56,624 INFO L93 Difference]: Finished difference Result 285 states and 341 transitions. [2021-12-07 01:23:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:23:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 90 [2021-12-07 01:23:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:56,626 INFO L225 Difference]: With dead ends: 285 [2021-12-07 01:23:56,626 INFO L226 Difference]: Without dead ends: 283 [2021-12-07 01:23:56,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:23:56,626 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 24 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:56,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 648 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:23:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-07 01:23:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 271. [2021-12-07 01:23:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 192 states have (on average 1.1145833333333333) internal successors, (214), 201 states have internal predecessors, (214), 51 states have call successors, (51), 26 states have call predecessors, (51), 27 states have return successors, (58), 43 states have call predecessors, (58), 48 states have call successors, (58) [2021-12-07 01:23:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 323 transitions. [2021-12-07 01:23:56,648 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 323 transitions. Word has length 90 [2021-12-07 01:23:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:56,648 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 323 transitions. [2021-12-07 01:23:56,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-07 01:23:56,649 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 323 transitions. [2021-12-07 01:23:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-07 01:23:56,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:56,650 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:56,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-07 01:23:56,650 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash -195763756, now seen corresponding path program 1 times [2021-12-07 01:23:56,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:56,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570635894] [2021-12-07 01:23:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:56,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:23:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:23:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-07 01:23:56,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:56,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570635894] [2021-12-07 01:23:56,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570635894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:56,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:56,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-07 01:23:56,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223266022] [2021-12-07 01:23:56,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:56,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:23:56,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:56,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:23:56,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:23:56,989 INFO L87 Difference]: Start difference. First operand 271 states and 323 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-07 01:23:57,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:57,621 INFO L93 Difference]: Finished difference Result 302 states and 365 transitions. [2021-12-07 01:23:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:23:57,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 90 [2021-12-07 01:23:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:57,623 INFO L225 Difference]: With dead ends: 302 [2021-12-07 01:23:57,623 INFO L226 Difference]: Without dead ends: 300 [2021-12-07 01:23:57,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:23:57,624 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 77 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:57,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 863 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:23:57,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-07 01:23:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 287. [2021-12-07 01:23:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 201 states have (on average 1.1194029850746268) internal successors, (225), 210 states have internal predecessors, (225), 57 states have call successors, (57), 27 states have call predecessors, (57), 28 states have return successors, (64), 49 states have call predecessors, (64), 54 states have call successors, (64) [2021-12-07 01:23:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 346 transitions. [2021-12-07 01:23:57,649 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 346 transitions. Word has length 90 [2021-12-07 01:23:57,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:57,650 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 346 transitions. [2021-12-07 01:23:57,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-07 01:23:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 346 transitions. [2021-12-07 01:23:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-07 01:23:57,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:57,651 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:57,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-07 01:23:57,652 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:57,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash -747210356, now seen corresponding path program 1 times [2021-12-07 01:23:57,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:57,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753816051] [2021-12-07 01:23:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:57,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:57,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:57,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:57,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:57,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:57,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:57,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:57,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:57,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:57,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:57,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:23:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:58,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:23:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-07 01:23:58,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:58,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753816051] [2021-12-07 01:23:58,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753816051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:58,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:58,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-07 01:23:58,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995577824] [2021-12-07 01:23:58,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:58,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 01:23:58,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:58,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 01:23:58,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:23:58,010 INFO L87 Difference]: Start difference. First operand 287 states and 346 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-07 01:23:58,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:58,522 INFO L93 Difference]: Finished difference Result 355 states and 443 transitions. [2021-12-07 01:23:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:23:58,522 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 90 [2021-12-07 01:23:58,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:58,524 INFO L225 Difference]: With dead ends: 355 [2021-12-07 01:23:58,524 INFO L226 Difference]: Without dead ends: 333 [2021-12-07 01:23:58,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:23:58,525 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 24 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:58,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 620 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:23:58,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-07 01:23:58,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 310. [2021-12-07 01:23:58,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 212 states have (on average 1.1179245283018868) internal successors, (237), 221 states have internal predecessors, (237), 69 states have call successors, (69), 27 states have call predecessors, (69), 28 states have return successors, (76), 61 states have call predecessors, (76), 66 states have call successors, (76) [2021-12-07 01:23:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 382 transitions. [2021-12-07 01:23:58,562 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 382 transitions. Word has length 90 [2021-12-07 01:23:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:58,562 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 382 transitions. [2021-12-07 01:23:58,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-07 01:23:58,562 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 382 transitions. [2021-12-07 01:23:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-07 01:23:58,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:58,564 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:58,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-07 01:23:58,564 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash -676844014, now seen corresponding path program 1 times [2021-12-07 01:23:58,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:58,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419916050] [2021-12-07 01:23:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:58,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:59,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:23:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:59,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:23:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:59,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:23:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:59,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:23:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:59,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:23:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:59,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:59,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:23:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:59,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:23:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:59,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:59,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:23:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:59,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:23:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-07 01:23:59,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:59,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419916050] [2021-12-07 01:23:59,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419916050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:59,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:59,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-07 01:23:59,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631569196] [2021-12-07 01:23:59,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:59,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 01:23:59,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:59,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 01:23:59,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:23:59,146 INFO L87 Difference]: Start difference. First operand 310 states and 382 transitions. Second operand has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-07 01:23:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:59,866 INFO L93 Difference]: Finished difference Result 341 states and 424 transitions. [2021-12-07 01:23:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:23:59,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 90 [2021-12-07 01:23:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:59,868 INFO L225 Difference]: With dead ends: 341 [2021-12-07 01:23:59,868 INFO L226 Difference]: Without dead ends: 339 [2021-12-07 01:23:59,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:23:59,869 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 35 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:59,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1096 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:23:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-07 01:23:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 322. [2021-12-07 01:23:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 218 states have (on average 1.1192660550458715) internal successors, (244), 227 states have internal predecessors, (244), 75 states have call successors, (75), 27 states have call predecessors, (75), 28 states have return successors, (82), 67 states have call predecessors, (82), 72 states have call successors, (82) [2021-12-07 01:23:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 401 transitions. [2021-12-07 01:23:59,901 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 401 transitions. Word has length 90 [2021-12-07 01:23:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:59,901 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 401 transitions. [2021-12-07 01:23:59,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-07 01:23:59,901 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 401 transitions. [2021-12-07 01:23:59,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-07 01:23:59,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:59,902 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:59,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-07 01:23:59,903 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:59,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:59,903 INFO L85 PathProgramCache]: Analyzing trace with hash -689952054, now seen corresponding path program 1 times [2021-12-07 01:23:59,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:59,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054512094] [2021-12-07 01:23:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:59,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:24:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:24:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:24:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:24:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:24:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:24:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:24:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:24:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-07 01:24:00,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:00,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054512094] [2021-12-07 01:24:00,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054512094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:00,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853662370] [2021-12-07 01:24:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:00,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:00,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:00,218 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:00,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 01:24:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:00,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-07 01:24:00,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:00,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:00,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-12-07 01:24:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 01:24:00,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-07 01:24:01,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853662370] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:24:01,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:24:01,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 24 [2021-12-07 01:24:01,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505659741] [2021-12-07 01:24:01,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:01,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 01:24:01,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:01,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 01:24:01,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:24:01,211 INFO L87 Difference]: Start difference. First operand 322 states and 401 transitions. Second operand has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 11 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 8 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-07 01:24:03,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:03,021 INFO L93 Difference]: Finished difference Result 507 states and 665 transitions. [2021-12-07 01:24:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-07 01:24:03,021 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 11 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 8 states have call predecessors, (20), 10 states have call successors, (20) Word has length 90 [2021-12-07 01:24:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:03,024 INFO L225 Difference]: With dead ends: 507 [2021-12-07 01:24:03,024 INFO L226 Difference]: Without dead ends: 482 [2021-12-07 01:24:03,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 186 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2021-12-07 01:24:03,025 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 274 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:03,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 1837 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1452 Invalid, 0 Unknown, 269 Unchecked, 1.2s Time] [2021-12-07 01:24:03,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-12-07 01:24:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 335. [2021-12-07 01:24:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 226 states have (on average 1.1150442477876106) internal successors, (252), 234 states have internal predecessors, (252), 79 states have call successors, (79), 28 states have call predecessors, (79), 29 states have return successors, (85), 72 states have call predecessors, (85), 76 states have call successors, (85) [2021-12-07 01:24:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 416 transitions. [2021-12-07 01:24:03,063 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 416 transitions. Word has length 90 [2021-12-07 01:24:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:03,063 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 416 transitions. [2021-12-07 01:24:03,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 11 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 8 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-07 01:24:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 416 transitions. [2021-12-07 01:24:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-07 01:24:03,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:03,064 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:03,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 01:24:03,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 01:24:03,265 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:03,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:03,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1680266801, now seen corresponding path program 1 times [2021-12-07 01:24:03,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:03,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269674300] [2021-12-07 01:24:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:03,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:03,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:03,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:24:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:03,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:03,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:24:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:03,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:24:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:03,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:24:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:03,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:03,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:03,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:24:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 01:24:03,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:03,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269674300] [2021-12-07 01:24:03,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269674300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:03,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:03,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-07 01:24:03,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526310047] [2021-12-07 01:24:03,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:03,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:24:03,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:24:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:24:03,547 INFO L87 Difference]: Start difference. First operand 335 states and 416 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-07 01:24:03,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:03,940 INFO L93 Difference]: Finished difference Result 345 states and 425 transitions. [2021-12-07 01:24:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:24:03,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 89 [2021-12-07 01:24:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:03,942 INFO L225 Difference]: With dead ends: 345 [2021-12-07 01:24:03,942 INFO L226 Difference]: Without dead ends: 343 [2021-12-07 01:24:03,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-12-07 01:24:03,943 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 63 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:03,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 851 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:24:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-07 01:24:03,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 333. [2021-12-07 01:24:03,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 226 states have (on average 1.1106194690265487) internal successors, (251), 234 states have internal predecessors, (251), 77 states have call successors, (77), 28 states have call predecessors, (77), 29 states have return successors, (83), 70 states have call predecessors, (83), 74 states have call successors, (83) [2021-12-07 01:24:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 411 transitions. [2021-12-07 01:24:03,999 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 411 transitions. Word has length 89 [2021-12-07 01:24:03,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:03,999 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 411 transitions. [2021-12-07 01:24:03,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-07 01:24:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 411 transitions. [2021-12-07 01:24:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-07 01:24:04,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:04,001 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:04,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-07 01:24:04,001 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:04,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1792661847, now seen corresponding path program 1 times [2021-12-07 01:24:04,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:04,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957061508] [2021-12-07 01:24:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:04,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:24:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:24:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:24:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:24:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:24:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:24:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:24:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:24:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-07 01:24:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-07 01:24:04,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:04,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957061508] [2021-12-07 01:24:04,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957061508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:04,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:04,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-07 01:24:04,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520556200] [2021-12-07 01:24:04,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:04,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 01:24:04,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:04,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 01:24:04,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:24:04,421 INFO L87 Difference]: Start difference. First operand 333 states and 411 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-07 01:24:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:04,970 INFO L93 Difference]: Finished difference Result 375 states and 469 transitions. [2021-12-07 01:24:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:24:04,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 96 [2021-12-07 01:24:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:04,972 INFO L225 Difference]: With dead ends: 375 [2021-12-07 01:24:04,973 INFO L226 Difference]: Without dead ends: 357 [2021-12-07 01:24:04,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:24:04,973 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 26 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:04,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 473 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:24:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-12-07 01:24:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 347. [2021-12-07 01:24:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 234 states have (on average 1.1196581196581197) internal successors, (262), 241 states have internal predecessors, (262), 83 states have call successors, (83), 28 states have call predecessors, (83), 29 states have return successors, (89), 77 states have call predecessors, (89), 80 states have call successors, (89) [2021-12-07 01:24:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 434 transitions. [2021-12-07 01:24:05,011 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 434 transitions. Word has length 96 [2021-12-07 01:24:05,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:05,011 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 434 transitions. [2021-12-07 01:24:05,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-07 01:24:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 434 transitions. [2021-12-07 01:24:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-07 01:24:05,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:05,012 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:05,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-07 01:24:05,013 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:05,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1410948513, now seen corresponding path program 1 times [2021-12-07 01:24:05,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:05,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202591349] [2021-12-07 01:24:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:05,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:24:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:24:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:24:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:24:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:24:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:24:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:24:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:24:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-07 01:24:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-07 01:24:05,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202591349] [2021-12-07 01:24:05,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202591349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:05,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:05,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 01:24:05,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845910220] [2021-12-07 01:24:05,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:05,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:24:05,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:24:05,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:24:05,187 INFO L87 Difference]: Start difference. First operand 347 states and 434 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 01:24:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:05,373 INFO L93 Difference]: Finished difference Result 366 states and 457 transitions. [2021-12-07 01:24:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:24:05,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 96 [2021-12-07 01:24:05,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:05,375 INFO L225 Difference]: With dead ends: 366 [2021-12-07 01:24:05,375 INFO L226 Difference]: Without dead ends: 364 [2021-12-07 01:24:05,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:24:05,376 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 23 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:05,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 664 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:24:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-07 01:24:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 353. [2021-12-07 01:24:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 238 states have (on average 1.1176470588235294) internal successors, (266), 245 states have internal predecessors, (266), 84 states have call successors, (84), 29 states have call predecessors, (84), 30 states have return successors, (90), 78 states have call predecessors, (90), 81 states have call successors, (90) [2021-12-07 01:24:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 440 transitions. [2021-12-07 01:24:05,415 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 440 transitions. Word has length 96 [2021-12-07 01:24:05,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:05,415 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 440 transitions. [2021-12-07 01:24:05,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 01:24:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 440 transitions. [2021-12-07 01:24:05,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-07 01:24:05,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:05,417 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:05,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-07 01:24:05,417 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:05,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:05,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1751987097, now seen corresponding path program 1 times [2021-12-07 01:24:05,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:05,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577507852] [2021-12-07 01:24:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:05,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:24:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:24:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:24:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:24:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:24:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:24:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:24:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:24:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-07 01:24:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-07 01:24:05,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:05,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577507852] [2021-12-07 01:24:05,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577507852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:05,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:05,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-07 01:24:05,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829638736] [2021-12-07 01:24:05,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:05,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 01:24:05,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:05,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 01:24:05,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:24:05,805 INFO L87 Difference]: Start difference. First operand 353 states and 440 transitions. Second operand has 15 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-07 01:24:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:06,244 INFO L93 Difference]: Finished difference Result 379 states and 472 transitions. [2021-12-07 01:24:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:24:06,245 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 96 [2021-12-07 01:24:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:06,246 INFO L225 Difference]: With dead ends: 379 [2021-12-07 01:24:06,247 INFO L226 Difference]: Without dead ends: 377 [2021-12-07 01:24:06,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:24:06,247 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 55 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:06,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1129 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:24:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-07 01:24:06,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 360. [2021-12-07 01:24:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 242 states have (on average 1.115702479338843) internal successors, (270), 250 states have internal predecessors, (270), 86 states have call successors, (86), 30 states have call predecessors, (86), 31 states have return successors, (92), 79 states have call predecessors, (92), 83 states have call successors, (92) [2021-12-07 01:24:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 448 transitions. [2021-12-07 01:24:06,288 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 448 transitions. Word has length 96 [2021-12-07 01:24:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:06,288 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 448 transitions. [2021-12-07 01:24:06,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-07 01:24:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 448 transitions. [2021-12-07 01:24:06,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-07 01:24:06,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:06,290 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:06,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-07 01:24:06,290 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:06,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:06,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1241388199, now seen corresponding path program 1 times [2021-12-07 01:24:06,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:06,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133422658] [2021-12-07 01:24:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:06,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:24:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:24:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:24:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:24:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:24:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:24:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:24:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:24:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-07 01:24:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-07 01:24:06,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:06,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133422658] [2021-12-07 01:24:06,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133422658] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:06,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682977278] [2021-12-07 01:24:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:06,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:06,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:06,552 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:06,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 01:24:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 2616 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-07 01:24:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:06,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:07,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2021-12-07 01:24:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 19 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-07 01:24:07,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-07 01:24:07,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682977278] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:24:07,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:24:07,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 23 [2021-12-07 01:24:07,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900198032] [2021-12-07 01:24:07,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:07,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 01:24:07,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:07,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 01:24:07,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:24:07,460 INFO L87 Difference]: Start difference. First operand 360 states and 448 transitions. Second operand has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 11 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 9 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-07 01:24:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:09,225 INFO L93 Difference]: Finished difference Result 636 states and 810 transitions. [2021-12-07 01:24:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-07 01:24:09,225 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 11 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 9 states have call predecessors, (22), 11 states have call successors, (22) Word has length 96 [2021-12-07 01:24:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:09,228 INFO L225 Difference]: With dead ends: 636 [2021-12-07 01:24:09,228 INFO L226 Difference]: Without dead ends: 524 [2021-12-07 01:24:09,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 198 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=355, Invalid=2297, Unknown=0, NotChecked=0, Total=2652 [2021-12-07 01:24:09,229 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 179 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:09,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1215 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1488 Invalid, 0 Unknown, 205 Unchecked, 1.1s Time] [2021-12-07 01:24:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-12-07 01:24:09,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 366. [2021-12-07 01:24:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 247 states have (on average 1.097165991902834) internal successors, (271), 254 states have internal predecessors, (271), 85 states have call successors, (85), 31 states have call predecessors, (85), 33 states have return successors, (92), 80 states have call predecessors, (92), 82 states have call successors, (92) [2021-12-07 01:24:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 448 transitions. [2021-12-07 01:24:09,276 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 448 transitions. Word has length 96 [2021-12-07 01:24:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:09,276 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 448 transitions. [2021-12-07 01:24:09,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 11 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 9 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-07 01:24:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 448 transitions. [2021-12-07 01:24:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 01:24:09,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:09,278 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:09,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 01:24:09,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-07 01:24:09,479 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:09,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1566240838, now seen corresponding path program 1 times [2021-12-07 01:24:09,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:09,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70868480] [2021-12-07 01:24:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:09,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:24:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:24:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-07 01:24:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 01:24:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-07 01:24:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:24:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-07 01:24:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-07 01:24:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-07 01:24:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 01:24:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-07 01:24:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-07 01:24:09,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:09,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70868480] [2021-12-07 01:24:09,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70868480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:09,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763460834] [2021-12-07 01:24:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:09,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:09,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:09,990 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:09,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 01:24:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:10,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 2668 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-07 01:24:10,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:10,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:10,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 18 [2021-12-07 01:24:10,993 INFO L354 Elim1Store]: treesize reduction 65, result has 39.3 percent of original size [2021-12-07 01:24:10,993 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 4 case distinctions, treesize of input 43 treesize of output 72 [2021-12-07 01:24:10,998 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 8 treesize of output 7 [2021-12-07 01:24:11,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-07 01:24:11,198 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 [2021-12-07 01:24:11,210 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 [2021-12-07 01:24:11,228 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 [2021-12-07 01:24:11,242 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 [2021-12-07 01:24:11,373 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 5 treesize of output 3 [2021-12-07 01:24:11,381 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 [2021-12-07 01:24:11,390 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 36 treesize of output 30 [2021-12-07 01:24:12,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:24:12,639 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 73 treesize of output 53 [2021-12-07 01:24:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-07 01:24:12,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:12,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:24:12,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-07 01:24:12,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:24:12,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-12-07 01:24:13,000 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| Int) (v_arrayElimArr_8 (Array Int Int)) (aux_div_v_ArrVal_2023_40 Int) (|ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base| Int) (v_arrayElimArr_9 (Array Int Int))) (or (not (= (* 18446744073709551616 aux_div_v_ArrVal_2023_40) (select v_arrayElimArr_9 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|))) (not (= |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1| (select v_arrayElimArr_8 |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset|))) (<= (mod (select (select (store (store |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_arrayElimArr_8) |ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base| v_arrayElimArr_9) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.offset|) 18446744073709551616) 9223372036854775807))) (<= (mod |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~len~2#1| 18446744073709551616) 9223372036854775807)) is different from false [2021-12-07 01:24:13,040 WARN L838 $PredicateComparison]: unable to prove that (or |c_ULTIMATE.start_aws_byte_cursor_advance_#t~short1082#1| (and (forall ((|ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| Int) (v_arrayElimArr_8 (Array Int Int)) (aux_div_v_ArrVal_2023_40 Int) (|ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base| Int) (v_arrayElimArr_9 (Array Int Int))) (or (not (= (* 18446744073709551616 aux_div_v_ArrVal_2023_40) (select v_arrayElimArr_9 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|))) (not (= |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1| (select v_arrayElimArr_8 |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset|))) (<= (mod (select (select (store (store |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_arrayElimArr_8) |ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base| v_arrayElimArr_9) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.offset|) 18446744073709551616) 9223372036854775807))) (<= (mod |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~len~2#1| 18446744073709551616) 9223372036854775807))) is different from false [2021-12-07 01:24:13,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763460834] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:13,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:24:13,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-12-07 01:24:13,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091216583] [2021-12-07 01:24:13,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:13,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-07 01:24:13,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:13,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-07 01:24:13,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=955, Unknown=2, NotChecked=126, Total=1190 [2021-12-07 01:24:13,197 INFO L87 Difference]: Start difference. First operand 366 states and 448 transitions. Second operand has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 14 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (26), 10 states have call predecessors, (26), 13 states have call successors, (26) [2021-12-07 01:24:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:15,564 INFO L93 Difference]: Finished difference Result 509 states and 632 transitions. [2021-12-07 01:24:15,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 01:24:15,564 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 14 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (26), 10 states have call predecessors, (26), 13 states have call successors, (26) Word has length 101 [2021-12-07 01:24:15,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:15,567 INFO L225 Difference]: With dead ends: 509 [2021-12-07 01:24:15,567 INFO L226 Difference]: Without dead ends: 481 [2021-12-07 01:24:15,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 147 SyntacticMatches, 22 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=358, Invalid=3070, Unknown=2, NotChecked=230, Total=3660 [2021-12-07 01:24:15,568 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 183 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:15,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 961 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1897 Invalid, 0 Unknown, 360 Unchecked, 1.3s Time] [2021-12-07 01:24:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-12-07 01:24:15,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 405. [2021-12-07 01:24:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 274 states have (on average 1.094890510948905) internal successors, (300), 282 states have internal predecessors, (300), 92 states have call successors, (92), 36 states have call predecessors, (92), 38 states have return successors, (99), 86 states have call predecessors, (99), 89 states have call successors, (99) [2021-12-07 01:24:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 491 transitions. [2021-12-07 01:24:15,619 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 491 transitions. Word has length 101 [2021-12-07 01:24:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:15,620 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 491 transitions. [2021-12-07 01:24:15,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 14 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (26), 10 states have call predecessors, (26), 13 states have call successors, (26) [2021-12-07 01:24:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 491 transitions. [2021-12-07 01:24:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 01:24:15,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:15,621 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:15,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-07 01:24:15,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-07 01:24:15,822 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:15,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:15,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1636607180, now seen corresponding path program 1 times [2021-12-07 01:24:15,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:15,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087404690] [2021-12-07 01:24:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:15,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:24:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:24:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-07 01:24:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 01:24:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-07 01:24:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:24:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-07 01:24:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-07 01:24:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-07 01:24:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 01:24:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-07 01:24:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-07 01:24:16,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:16,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087404690] [2021-12-07 01:24:16,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087404690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:16,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:16,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-07 01:24:16,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566188494] [2021-12-07 01:24:16,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:16,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 01:24:16,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:16,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 01:24:16,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:24:16,381 INFO L87 Difference]: Start difference. First operand 405 states and 491 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-07 01:24:17,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:17,382 INFO L93 Difference]: Finished difference Result 458 states and 563 transitions. [2021-12-07 01:24:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:24:17,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 101 [2021-12-07 01:24:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:17,385 INFO L225 Difference]: With dead ends: 458 [2021-12-07 01:24:17,385 INFO L226 Difference]: Without dead ends: 456 [2021-12-07 01:24:17,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:24:17,386 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 107 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:17,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 437 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 01:24:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-07 01:24:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 424. [2021-12-07 01:24:17,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 285 states have (on average 1.0947368421052632) internal successors, (312), 293 states have internal predecessors, (312), 99 states have call successors, (99), 37 states have call predecessors, (99), 39 states have return successors, (106), 93 states have call predecessors, (106), 96 states have call successors, (106) [2021-12-07 01:24:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 517 transitions. [2021-12-07 01:24:17,434 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 517 transitions. Word has length 101 [2021-12-07 01:24:17,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:17,434 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 517 transitions. [2021-12-07 01:24:17,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-07 01:24:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 517 transitions. [2021-12-07 01:24:17,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-07 01:24:17,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:17,436 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:17,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-07 01:24:17,436 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash -326672390, now seen corresponding path program 1 times [2021-12-07 01:24:17,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:17,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191928503] [2021-12-07 01:24:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:17,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:24:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:24:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:24:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:24:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:24:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:24:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:24:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:24:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-07 01:24:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-07 01:24:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-07 01:24:19,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:19,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191928503] [2021-12-07 01:24:19,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191928503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:19,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242036277] [2021-12-07 01:24:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:19,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:19,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:19,843 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:19,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 01:24:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:20,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 2666 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-07 01:24:20,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:20,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:20,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:20,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:20,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-12-07 01:24:21,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:24:21,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:21,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:24:21,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:21,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:21,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:24:21,038 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-12-07 01:24:21,039 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 2 case distinctions, treesize of input 64 treesize of output 41 [2021-12-07 01:24:21,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:24:21,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:21,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:21,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:21,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:24:21,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:24:21,064 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-12-07 01:24:21,064 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 2 case distinctions, treesize of input 60 treesize of output 37 [2021-12-07 01:24:22,238 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-12-07 01:24:22,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 16 [2021-12-07 01:24:22,253 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-12-07 01:24:22,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 20 [2021-12-07 01:24:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 19 proven. 52 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-07 01:24:22,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:23,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242036277] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:23,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:24:23,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 45 [2021-12-07 01:24:23,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251481002] [2021-12-07 01:24:23,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:23,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-07 01:24:23,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-07 01:24:23,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2657, Unknown=0, NotChecked=0, Total=2862 [2021-12-07 01:24:23,558 INFO L87 Difference]: Start difference. First operand 424 states and 517 transitions. Second operand has 45 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 42 states have internal predecessors, (82), 18 states have call successors, (28), 3 states have call predecessors, (28), 6 states have return successors, (26), 12 states have call predecessors, (26), 16 states have call successors, (26) [2021-12-07 01:24:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:26,989 INFO L93 Difference]: Finished difference Result 474 states and 586 transitions. [2021-12-07 01:24:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-07 01:24:26,990 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 42 states have internal predecessors, (82), 18 states have call successors, (28), 3 states have call predecessors, (28), 6 states have return successors, (26), 12 states have call predecessors, (26), 16 states have call successors, (26) Word has length 102 [2021-12-07 01:24:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:26,992 INFO L225 Difference]: With dead ends: 474 [2021-12-07 01:24:26,992 INFO L226 Difference]: Without dead ends: 472 [2021-12-07 01:24:26,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 106 SyntacticMatches, 18 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=502, Invalid=6140, Unknown=0, NotChecked=0, Total=6642 [2021-12-07 01:24:26,995 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 113 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:26,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 1462 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1740 Invalid, 0 Unknown, 660 Unchecked, 1.5s Time] [2021-12-07 01:24:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-07 01:24:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 434. [2021-12-07 01:24:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 291 states have (on average 1.092783505154639) internal successors, (318), 300 states have internal predecessors, (318), 102 states have call successors, (102), 38 states have call predecessors, (102), 40 states have return successors, (109), 95 states have call predecessors, (109), 99 states have call successors, (109) [2021-12-07 01:24:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 529 transitions. [2021-12-07 01:24:27,069 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 529 transitions. Word has length 102 [2021-12-07 01:24:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:27,069 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 529 transitions. [2021-12-07 01:24:27,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 42 states have internal predecessors, (82), 18 states have call successors, (28), 3 states have call predecessors, (28), 6 states have return successors, (26), 12 states have call predecessors, (26), 16 states have call successors, (26) [2021-12-07 01:24:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 529 transitions. [2021-12-07 01:24:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 01:24:27,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:27,071 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:27,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 01:24:27,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-07 01:24:27,272 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:27,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1201612672, now seen corresponding path program 1 times [2021-12-07 01:24:27,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:27,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715101593] [2021-12-07 01:24:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:27,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:27,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:27,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:24:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:27,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:27,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:24:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:27,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:24:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:27,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:24:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:27,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:27,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:27,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:24:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:27,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:24:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:27,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:24:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 01:24:27,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715101593] [2021-12-07 01:24:27,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715101593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:27,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:27,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-07 01:24:27,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551420180] [2021-12-07 01:24:27,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:27,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 01:24:27,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:27,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 01:24:27,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:24:27,897 INFO L87 Difference]: Start difference. First operand 434 states and 529 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-07 01:24:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:29,307 INFO L93 Difference]: Finished difference Result 521 states and 638 transitions. [2021-12-07 01:24:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 01:24:29,307 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 101 [2021-12-07 01:24:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:29,309 INFO L225 Difference]: With dead ends: 521 [2021-12-07 01:24:29,309 INFO L226 Difference]: Without dead ends: 463 [2021-12-07 01:24:29,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 01:24:29,310 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 100 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:29,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 659 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-07 01:24:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-07 01:24:29,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 434. [2021-12-07 01:24:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 291 states have (on average 1.092783505154639) internal successors, (318), 300 states have internal predecessors, (318), 102 states have call successors, (102), 38 states have call predecessors, (102), 40 states have return successors, (108), 95 states have call predecessors, (108), 99 states have call successors, (108) [2021-12-07 01:24:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 528 transitions. [2021-12-07 01:24:29,362 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 528 transitions. Word has length 101 [2021-12-07 01:24:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:29,362 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 528 transitions. [2021-12-07 01:24:29,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-07 01:24:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 528 transitions. [2021-12-07 01:24:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-07 01:24:29,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:29,364 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:29,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-07 01:24:29,364 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:29,364 INFO L85 PathProgramCache]: Analyzing trace with hash -808905162, now seen corresponding path program 1 times [2021-12-07 01:24:29,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:29,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382021882] [2021-12-07 01:24:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:29,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:24:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:24:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:24:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:24:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:24:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:24:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:24:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:24:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-07 01:24:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-07 01:24:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-07 01:24:29,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:29,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382021882] [2021-12-07 01:24:29,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382021882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:29,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:29,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-07 01:24:29,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050894835] [2021-12-07 01:24:29,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:29,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 01:24:29,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:29,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 01:24:29,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:24:29,655 INFO L87 Difference]: Start difference. First operand 434 states and 528 transitions. Second operand has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-07 01:24:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:29,907 INFO L93 Difference]: Finished difference Result 470 states and 575 transitions. [2021-12-07 01:24:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:24:29,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 106 [2021-12-07 01:24:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:29,910 INFO L225 Difference]: With dead ends: 470 [2021-12-07 01:24:29,910 INFO L226 Difference]: Without dead ends: 431 [2021-12-07 01:24:29,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:24:29,911 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 51 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:29,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 580 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:24:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-07 01:24:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2021-12-07 01:24:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 290 states have (on average 1.0862068965517242) internal successors, (315), 297 states have internal predecessors, (315), 100 states have call successors, (100), 38 states have call predecessors, (100), 40 states have return successors, (106), 95 states have call predecessors, (106), 97 states have call successors, (106) [2021-12-07 01:24:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 521 transitions. [2021-12-07 01:24:29,960 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 521 transitions. Word has length 106 [2021-12-07 01:24:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:29,960 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 521 transitions. [2021-12-07 01:24:29,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-07 01:24:29,960 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 521 transitions. [2021-12-07 01:24:29,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-07 01:24:29,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:29,962 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:29,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-07 01:24:29,962 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:29,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:29,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1821091513, now seen corresponding path program 1 times [2021-12-07 01:24:29,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:29,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479302633] [2021-12-07 01:24:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:29,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:30,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:30,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:24:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:30,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:30,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:24:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:30,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:24:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:30,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:24:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:30,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:30,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:30,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:24:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:30,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:24:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:30,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:24:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-07 01:24:30,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:30,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479302633] [2021-12-07 01:24:30,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479302633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:30,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:30,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-07 01:24:30,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906992341] [2021-12-07 01:24:30,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:30,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:24:30,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:30,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:24:30,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:24:30,199 INFO L87 Difference]: Start difference. First operand 431 states and 521 transitions. Second operand has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-07 01:24:30,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:30,642 INFO L93 Difference]: Finished difference Result 437 states and 526 transitions. [2021-12-07 01:24:30,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:24:30,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 103 [2021-12-07 01:24:30,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:30,644 INFO L225 Difference]: With dead ends: 437 [2021-12-07 01:24:30,644 INFO L226 Difference]: Without dead ends: 435 [2021-12-07 01:24:30,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-12-07 01:24:30,645 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 57 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:30,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 913 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:24:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-12-07 01:24:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2021-12-07 01:24:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 293 states have (on average 1.0853242320819112) internal successors, (318), 300 states have internal predecessors, (318), 100 states have call successors, (100), 39 states have call predecessors, (100), 41 states have return successors, (106), 95 states have call predecessors, (106), 97 states have call successors, (106) [2021-12-07 01:24:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 524 transitions. [2021-12-07 01:24:30,694 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 524 transitions. Word has length 103 [2021-12-07 01:24:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:30,694 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 524 transitions. [2021-12-07 01:24:30,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-07 01:24:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 524 transitions. [2021-12-07 01:24:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-07 01:24:30,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:30,695 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:30,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-07 01:24:30,696 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:30,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:30,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1257386079, now seen corresponding path program 1 times [2021-12-07 01:24:30,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:30,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580442054] [2021-12-07 01:24:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:30,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:24:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:24:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-07 01:24:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 01:24:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-07 01:24:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:24:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-07 01:24:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-07 01:24:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-07 01:24:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 01:24:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-07 01:24:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:24:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-07 01:24:31,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:31,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580442054] [2021-12-07 01:24:31,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580442054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:31,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755383679] [2021-12-07 01:24:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:31,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:31,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:31,216 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:31,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 01:24:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:31,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 2686 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-07 01:24:31,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:31,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:32,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:24:32,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2021-12-07 01:24:32,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-12-07 01:24:32,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-07 01:24:32,167 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:24:32,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:24:32,169 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 [2021-12-07 01:24:33,222 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 01:24:33,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 18 [2021-12-07 01:24:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-07 01:24:33,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:33,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755383679] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:33,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:24:33,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 38 [2021-12-07 01:24:33,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037421978] [2021-12-07 01:24:33,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:33,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 01:24:33,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:33,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 01:24:33,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2021-12-07 01:24:33,641 INFO L87 Difference]: Start difference. First operand 435 states and 524 transitions. Second operand has 38 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 34 states have internal predecessors, (87), 15 states have call successors, (29), 4 states have call predecessors, (29), 5 states have return successors, (27), 11 states have call predecessors, (27), 13 states have call successors, (27) [2021-12-07 01:24:35,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:35,502 INFO L93 Difference]: Finished difference Result 489 states and 577 transitions. [2021-12-07 01:24:35,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-07 01:24:35,503 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 34 states have internal predecessors, (87), 15 states have call successors, (29), 4 states have call predecessors, (29), 5 states have return successors, (27), 11 states have call predecessors, (27), 13 states have call successors, (27) Word has length 107 [2021-12-07 01:24:35,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:35,505 INFO L225 Difference]: With dead ends: 489 [2021-12-07 01:24:35,505 INFO L226 Difference]: Without dead ends: 487 [2021-12-07 01:24:35,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 129 SyntacticMatches, 19 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=446, Invalid=5716, Unknown=0, NotChecked=0, Total=6162 [2021-12-07 01:24:35,506 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 115 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:35,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 1407 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1366 Invalid, 0 Unknown, 361 Unchecked, 1.0s Time] [2021-12-07 01:24:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-12-07 01:24:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 473. [2021-12-07 01:24:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 322 states have (on average 1.0776397515527951) internal successors, (347), 330 states have internal predecessors, (347), 102 states have call successors, (102), 46 states have call predecessors, (102), 48 states have return successors, (108), 96 states have call predecessors, (108), 99 states have call successors, (108) [2021-12-07 01:24:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 557 transitions. [2021-12-07 01:24:35,558 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 557 transitions. Word has length 107 [2021-12-07 01:24:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:35,559 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 557 transitions. [2021-12-07 01:24:35,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 34 states have internal predecessors, (87), 15 states have call successors, (29), 4 states have call predecessors, (29), 5 states have return successors, (27), 11 states have call predecessors, (27), 13 states have call successors, (27) [2021-12-07 01:24:35,559 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 557 transitions. [2021-12-07 01:24:35,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-07 01:24:35,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:35,560 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:35,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-07 01:24:35,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-07 01:24:35,761 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:35,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:35,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1379697227, now seen corresponding path program 1 times [2021-12-07 01:24:35,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:35,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589378162] [2021-12-07 01:24:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:35,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:24:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 01:24:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:24:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:24:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:24:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 01:24:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 01:24:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:24:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-07 01:24:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-07 01:24:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-07 01:24:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-12-07 01:24:36,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:36,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589378162] [2021-12-07 01:24:36,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589378162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:36,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:36,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-07 01:24:36,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029897121] [2021-12-07 01:24:36,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:36,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 01:24:36,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:36,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 01:24:36,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:24:36,283 INFO L87 Difference]: Start difference. First operand 473 states and 557 transitions. Second operand has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-07 01:24:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:36,695 INFO L93 Difference]: Finished difference Result 483 states and 567 transitions. [2021-12-07 01:24:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:24:36,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 108 [2021-12-07 01:24:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:36,698 INFO L225 Difference]: With dead ends: 483 [2021-12-07 01:24:36,698 INFO L226 Difference]: Without dead ends: 416 [2021-12-07 01:24:36,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:24:36,699 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 28 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:36,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 625 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:24:36,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-12-07 01:24:36,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2021-12-07 01:24:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 283 states have (on average 1.0848056537102473) internal successors, (307), 290 states have internal predecessors, (307), 90 states have call successors, (90), 40 states have call predecessors, (90), 42 states have return successors, (96), 85 states have call predecessors, (96), 87 states have call successors, (96) [2021-12-07 01:24:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 493 transitions. [2021-12-07 01:24:36,745 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 493 transitions. Word has length 108 [2021-12-07 01:24:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:36,745 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 493 transitions. [2021-12-07 01:24:36,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-07 01:24:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 493 transitions. [2021-12-07 01:24:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-07 01:24:36,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:36,746 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:36,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-07 01:24:36,746 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:36,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1817341847, now seen corresponding path program 1 times [2021-12-07 01:24:36,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:36,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809030903] [2021-12-07 01:24:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:36,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:24:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:24:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-07 01:24:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 01:24:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-07 01:24:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 01:24:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-07 01:24:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-07 01:24:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-07 01:24:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-07 01:24:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 01:24:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-07 01:24:37,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809030903] [2021-12-07 01:24:37,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809030903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479011821] [2021-12-07 01:24:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:37,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:37,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:37,366 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:37,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 01:24:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:37,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 2690 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-07 01:24:37,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:37,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:38,184 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-07 01:24:38,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 1 [2021-12-07 01:24:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-07 01:24:38,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-07 01:24:38,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479011821] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:24:38,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:24:38,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 10] total 34 [2021-12-07 01:24:38,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129634858] [2021-12-07 01:24:38,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:38,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 01:24:38,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:38,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 01:24:38,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 01:24:38,577 INFO L87 Difference]: Start difference. First operand 416 states and 493 transitions. Second operand has 34 states, 31 states have (on average 3.806451612903226) internal successors, (118), 32 states have internal predecessors, (118), 13 states have call successors, (39), 4 states have call predecessors, (39), 7 states have return successors, (38), 9 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-07 01:24:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:41,662 INFO L93 Difference]: Finished difference Result 600 states and 725 transitions. [2021-12-07 01:24:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-07 01:24:41,662 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 3.806451612903226) internal successors, (118), 32 states have internal predecessors, (118), 13 states have call successors, (39), 4 states have call predecessors, (39), 7 states have return successors, (38), 9 states have call predecessors, (38), 13 states have call successors, (38) Word has length 107 [2021-12-07 01:24:41,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:41,665 INFO L225 Difference]: With dead ends: 600 [2021-12-07 01:24:41,665 INFO L226 Difference]: Without dead ends: 464 [2021-12-07 01:24:41,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 226 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=421, Invalid=3611, Unknown=0, NotChecked=0, Total=4032 [2021-12-07 01:24:41,667 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 242 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 2609 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 3536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 2609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:41,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 640 Invalid, 3536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 2609 Invalid, 0 Unknown, 587 Unchecked, 2.1s Time] [2021-12-07 01:24:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-12-07 01:24:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 374. [2021-12-07 01:24:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 257 states have (on average 1.0739299610894941) internal successors, (276), 263 states have internal predecessors, (276), 76 states have call successors, (76), 39 states have call predecessors, (76), 40 states have return successors, (81), 71 states have call predecessors, (81), 73 states have call successors, (81) [2021-12-07 01:24:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 433 transitions. [2021-12-07 01:24:41,713 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 433 transitions. Word has length 107 [2021-12-07 01:24:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:41,714 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 433 transitions. [2021-12-07 01:24:41,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 3.806451612903226) internal successors, (118), 32 states have internal predecessors, (118), 13 states have call successors, (39), 4 states have call predecessors, (39), 7 states have return successors, (38), 9 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-07 01:24:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 433 transitions. [2021-12-07 01:24:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-07 01:24:41,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:41,715 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:41,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 01:24:41,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-07 01:24:41,916 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:41,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:41,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1767868658, now seen corresponding path program 1 times [2021-12-07 01:24:41,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:41,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211554646] [2021-12-07 01:24:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:41,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:24:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:24:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:24:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:24:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-07 01:24:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-07 01:24:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 01:24:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:24:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-07 01:24:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-07 01:24:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-07 01:24:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-07 01:24:42,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:42,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211554646] [2021-12-07 01:24:42,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211554646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:42,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219639053] [2021-12-07 01:24:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:42,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:42,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:42,297 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:42,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 01:24:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 2712 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-07 01:24:42,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:42,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:42,731 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:42,731 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 [2021-12-07 01:24:43,019 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-07 01:24:43,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-07 01:24:43,048 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 17 treesize of output 19 [2021-12-07 01:24:47,156 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 17 treesize of output 19 [2021-12-07 01:24:51,442 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-07 01:24:51,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-12-07 01:24:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 62 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-07 01:24:51,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:51,640 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2747 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_2747) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.offset|))) (<= .cse0 (+ 18446744073709551615 (* 18446744073709551616 (div (+ (- 1) .cse0) 18446744073709551616)))))) is different from false [2021-12-07 01:24:51,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219639053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:51,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:24:51,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 30 [2021-12-07 01:24:51,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79333301] [2021-12-07 01:24:51,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:51,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 01:24:51,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:51,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 01:24:51,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=825, Unknown=3, NotChecked=58, Total=992 [2021-12-07 01:24:51,645 INFO L87 Difference]: Start difference. First operand 374 states and 433 transitions. Second operand has 30 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 27 states have internal predecessors, (103), 10 states have call successors, (28), 7 states have call predecessors, (28), 10 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-07 01:24:54,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:54,349 INFO L93 Difference]: Finished difference Result 481 states and 548 transitions. [2021-12-07 01:24:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-07 01:24:54,350 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 27 states have internal predecessors, (103), 10 states have call successors, (28), 7 states have call predecessors, (28), 10 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) Word has length 114 [2021-12-07 01:24:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:54,351 INFO L225 Difference]: With dead ends: 481 [2021-12-07 01:24:54,351 INFO L226 Difference]: Without dead ends: 347 [2021-12-07 01:24:54,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 191 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=215, Invalid=1765, Unknown=4, NotChecked=86, Total=2070 [2021-12-07 01:24:54,352 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 62 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 629 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:54,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 611 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 506 Invalid, 0 Unknown, 629 Unchecked, 0.4s Time] [2021-12-07 01:24:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-07 01:24:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2021-12-07 01:24:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 243 states have (on average 1.0617283950617284) internal successors, (258), 248 states have internal predecessors, (258), 64 states have call successors, (64), 38 states have call predecessors, (64), 39 states have return successors, (68), 60 states have call predecessors, (68), 61 states have call successors, (68) [2021-12-07 01:24:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 390 transitions. [2021-12-07 01:24:54,387 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 390 transitions. Word has length 114 [2021-12-07 01:24:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:54,387 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 390 transitions. [2021-12-07 01:24:54,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 27 states have internal predecessors, (103), 10 states have call successors, (28), 7 states have call predecessors, (28), 10 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-07 01:24:54,388 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 390 transitions. [2021-12-07 01:24:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-07 01:24:54,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:54,389 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:54,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-07 01:24:54,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-07 01:24:54,590 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:54,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:54,590 INFO L85 PathProgramCache]: Analyzing trace with hash -110307088, now seen corresponding path program 1 times [2021-12-07 01:24:54,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:54,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208516285] [2021-12-07 01:24:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:54,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:54,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:54,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:24:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:54,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:54,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:24:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:55,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-07 01:24:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:55,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 01:24:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:55,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-07 01:24:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:55,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:24:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:55,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-07 01:24:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:55,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-07 01:24:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:55,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-07 01:24:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:55,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 01:24:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:55,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-07 01:24:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:55,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:24:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:55,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:24:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-07 01:24:55,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:55,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208516285] [2021-12-07 01:24:55,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208516285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:55,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:55,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-07 01:24:55,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441140845] [2021-12-07 01:24:55,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:55,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:24:55,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:55,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:24:55,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:24:55,061 INFO L87 Difference]: Start difference. First operand 347 states and 390 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 8 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-07 01:24:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:55,932 INFO L93 Difference]: Finished difference Result 363 states and 407 transitions. [2021-12-07 01:24:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:24:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 8 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 117 [2021-12-07 01:24:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:55,934 INFO L225 Difference]: With dead ends: 363 [2021-12-07 01:24:55,934 INFO L226 Difference]: Without dead ends: 298 [2021-12-07 01:24:55,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:24:55,935 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 131 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:55,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 395 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 01:24:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-07 01:24:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 293. [2021-12-07 01:24:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 208 states have (on average 1.0625) internal successors, (221), 213 states have internal predecessors, (221), 51 states have call successors, (51), 32 states have call predecessors, (51), 33 states have return successors, (55), 47 states have call predecessors, (55), 48 states have call successors, (55) [2021-12-07 01:24:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 327 transitions. [2021-12-07 01:24:55,961 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 327 transitions. Word has length 117 [2021-12-07 01:24:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:55,961 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 327 transitions. [2021-12-07 01:24:55,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 8 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-07 01:24:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 327 transitions. [2021-12-07 01:24:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-07 01:24:55,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:55,962 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:55,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-07 01:24:55,962 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:55,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:55,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1577419131, now seen corresponding path program 1 times [2021-12-07 01:24:55,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:55,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920809645] [2021-12-07 01:24:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:55,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:24:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:24:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-07 01:24:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 01:24:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-07 01:24:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 01:24:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-07 01:24:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-07 01:24:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-07 01:24:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 01:24:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-07 01:24:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-07 01:24:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-07 01:24:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-07 01:24:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-07 01:24:56,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:56,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920809645] [2021-12-07 01:24:56,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920809645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:56,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:56,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-07 01:24:56,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894547687] [2021-12-07 01:24:56,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:56,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 01:24:56,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:56,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 01:24:56,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:24:56,526 INFO L87 Difference]: Start difference. First operand 293 states and 327 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-07 01:24:57,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:57,179 INFO L93 Difference]: Finished difference Result 301 states and 334 transitions. [2021-12-07 01:24:57,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:24:57,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 119 [2021-12-07 01:24:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:57,181 INFO L225 Difference]: With dead ends: 301 [2021-12-07 01:24:57,181 INFO L226 Difference]: Without dead ends: 210 [2021-12-07 01:24:57,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:24:57,181 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 87 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:57,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 322 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:24:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-07 01:24:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2021-12-07 01:24:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 149 states have (on average 1.080536912751678) internal successors, (161), 153 states have internal predecessors, (161), 39 states have call successors, (39), 21 states have call predecessors, (39), 21 states have return successors, (42), 35 states have call predecessors, (42), 36 states have call successors, (42) [2021-12-07 01:24:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 242 transitions. [2021-12-07 01:24:57,200 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 242 transitions. Word has length 119 [2021-12-07 01:24:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:57,200 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 242 transitions. [2021-12-07 01:24:57,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-07 01:24:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 242 transitions. [2021-12-07 01:24:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-07 01:24:57,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:57,201 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:57,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-07 01:24:57,201 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:57,201 INFO L85 PathProgramCache]: Analyzing trace with hash -362342817, now seen corresponding path program 2 times [2021-12-07 01:24:57,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:57,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790025815] [2021-12-07 01:24:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:57,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:24:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:24:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:24:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:24:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:24:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:24:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:24:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:24:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:24:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:24:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:24:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-07 01:24:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-07 01:24:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-07 01:24:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-07 01:24:57,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:57,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790025815] [2021-12-07 01:24:57,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790025815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:57,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936275657] [2021-12-07 01:24:57,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:24:57,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:57,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:57,643 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:57,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 01:24:58,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:24:58,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:24:58,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 2734 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-07 01:24:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:58,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:58,267 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:24:58,267 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 [2021-12-07 01:24:58,443 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-07 01:24:58,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-07 01:24:58,488 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 0 case distinctions, treesize of input 18 treesize of output 23 [2021-12-07 01:24:59,562 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_69| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_19| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_69| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_19|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_19|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_69|) 0)))) is different from true [2021-12-07 01:24:59,642 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 0 case distinctions, treesize of input 18 treesize of output 23 [2021-12-07 01:25:00,772 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base_BEFORE_CALL_39| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_20| Int)) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base_BEFORE_CALL_39|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_20|) 0)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_20| |v_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base_BEFORE_CALL_39|)))) is different from true [2021-12-07 01:25:01,938 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_21| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base_BEFORE_CALL_40| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_21| |v_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base_BEFORE_CALL_40|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_21|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base_BEFORE_CALL_40|) 0)))) is different from true [2021-12-07 01:25:02,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-07 01:25:02,152 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-07 01:25:02,152 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 29 treesize of output 40 [2021-12-07 01:25:02,171 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 [2021-12-07 01:25:02,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-07 01:25:02,192 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 19 treesize of output 15 [2021-12-07 01:25:04,298 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_22| Int)) (and (or (< (mod (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) 0) 18446744073709551616) 18446744073709551615) (< (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_22|) 0) 18446744073709551616) 18446744073709551615)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_22| |ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|)))) is different from true [2021-12-07 01:25:06,487 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_23| Int)) (and (or (< (mod (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) 0) 18446744073709551616) 18446744073709551615) (< (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_23|) 0) 18446744073709551616) 18446744073709551615)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_23| |ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|)))) is different from true [2021-12-07 01:25:08,662 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_24| Int)) (and (or (< (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_24|) 0) 18446744073709551616) 18446744073709551615) (< (mod (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) 0) 18446744073709551616) 18446744073709551615)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_24| |ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|)))) is different from true [2021-12-07 01:25:22,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:25:22,565 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 92 treesize of output 76 [2021-12-07 01:25:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 77 not checked. [2021-12-07 01:25:22,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:25:22,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:25:22,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-12-07 01:25:23,007 WARN L838 $PredicateComparison]: unable to prove that (or (<= (mod |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1| 18446744073709551616) (mod (select (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|) 18446744073709551616)) (forall ((|ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| Int) (v_arrayElimArr_13 (Array Int Int)) (aux_div_v_ArrVal_2954_40 Int)) (or (< (mod (select (select (store |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_arrayElimArr_13) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.offset|) 18446744073709551616) (mod |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~len~2#1| 18446744073709551616)) (not (= (* 18446744073709551616 aux_div_v_ArrVal_2954_40) (select v_arrayElimArr_13 |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset|)))))) is different from false [2021-12-07 01:25:23,026 WARN L838 $PredicateComparison]: unable to prove that (or (<= (mod |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1| 18446744073709551616) (mod (select (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|) 18446744073709551616)) (forall ((|ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| Int) (v_arrayElimArr_13 (Array Int Int)) (aux_div_v_ArrVal_2954_40 Int)) (or (not (= (* 18446744073709551616 aux_div_v_ArrVal_2954_40) (select v_arrayElimArr_13 0))) (< (mod (select (select (store |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_arrayElimArr_13) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.offset|) 18446744073709551616) (mod |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~len~2#1| 18446744073709551616))))) is different from false [2021-12-07 01:25:23,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936275657] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:25:23,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:25:23,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 40 [2021-12-07 01:25:23,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47197180] [2021-12-07 01:25:23,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:25:23,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-07 01:25:23,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:23,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-07 01:25:23,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1304, Unknown=9, NotChecked=632, Total=2070 [2021-12-07 01:25:23,046 INFO L87 Difference]: Start difference. First operand 210 states and 242 transitions. Second operand has 40 states, 38 states have (on average 3.8157894736842106) internal successors, (145), 37 states have internal predecessors, (145), 12 states have call successors, (28), 12 states have call predecessors, (28), 13 states have return successors, (27), 10 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-07 01:26:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:40,989 INFO L93 Difference]: Finished difference Result 279 states and 318 transitions. [2021-12-07 01:26:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 01:26:40,989 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.8157894736842106) internal successors, (145), 37 states have internal predecessors, (145), 12 states have call successors, (28), 12 states have call predecessors, (28), 13 states have return successors, (27), 10 states have call predecessors, (27), 12 states have call successors, (27) Word has length 120 [2021-12-07 01:26:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:40,990 INFO L225 Difference]: With dead ends: 279 [2021-12-07 01:26:40,991 INFO L226 Difference]: Without dead ends: 214 [2021-12-07 01:26:40,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 159 SyntacticMatches, 21 SemanticMatches, 66 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 98.4s TimeCoverageRelationStatistics Valid=289, Invalid=3244, Unknown=39, NotChecked=984, Total=4556 [2021-12-07 01:26:40,991 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 54 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1540 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:40,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 1272 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 846 Invalid, 0 Unknown, 1540 Unchecked, 0.5s Time] [2021-12-07 01:26:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-07 01:26:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-12-07 01:26:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 152 states have (on average 1.0789473684210527) internal successors, (164), 156 states have internal predecessors, (164), 40 states have call successors, (40), 22 states have call predecessors, (40), 21 states have return successors, (43), 35 states have call predecessors, (43), 37 states have call successors, (43) [2021-12-07 01:26:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 247 transitions. [2021-12-07 01:26:41,011 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 247 transitions. Word has length 120 [2021-12-07 01:26:41,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:41,011 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 247 transitions. [2021-12-07 01:26:41,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.8157894736842106) internal successors, (145), 37 states have internal predecessors, (145), 12 states have call successors, (28), 12 states have call predecessors, (28), 13 states have return successors, (27), 10 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-07 01:26:41,011 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 247 transitions. [2021-12-07 01:26:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-07 01:26:41,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:41,012 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:26:41,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 01:26:41,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:26:41,213 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:26:41,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash -913789417, now seen corresponding path program 1 times [2021-12-07 01:26:41,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:26:41,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065522666] [2021-12-07 01:26:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:41,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:26:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:26:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:26:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:26:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:26:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:26:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:26:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:26:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:26:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:26:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:26:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:26:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-07 01:26:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-07 01:26:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-07 01:26:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-07 01:26:41,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:26:41,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065522666] [2021-12-07 01:26:41,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065522666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:26:41,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:26:41,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-07 01:26:41,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086537650] [2021-12-07 01:26:41,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:26:41,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 01:26:41,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:26:41,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 01:26:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:26:41,889 INFO L87 Difference]: Start difference. First operand 214 states and 247 transitions. Second operand has 17 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 8 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-07 01:26:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:43,118 INFO L93 Difference]: Finished difference Result 265 states and 311 transitions. [2021-12-07 01:26:43,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:26:43,118 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 8 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 120 [2021-12-07 01:26:43,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:43,119 INFO L225 Difference]: With dead ends: 265 [2021-12-07 01:26:43,119 INFO L226 Difference]: Without dead ends: 237 [2021-12-07 01:26:43,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:26:43,120 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 87 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:43,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 284 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-07 01:26:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-07 01:26:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 223. [2021-12-07 01:26:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 156 states have (on average 1.0705128205128205) internal successors, (167), 159 states have internal predecessors, (167), 45 states have call successors, (45), 22 states have call predecessors, (45), 21 states have return successors, (48), 41 states have call predecessors, (48), 42 states have call successors, (48) [2021-12-07 01:26:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 260 transitions. [2021-12-07 01:26:43,142 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 260 transitions. Word has length 120 [2021-12-07 01:26:43,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:43,143 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 260 transitions. [2021-12-07 01:26:43,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 8 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-07 01:26:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 260 transitions. [2021-12-07 01:26:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-07 01:26:43,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:43,144 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:26:43,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-07 01:26:43,144 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:26:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:43,144 INFO L85 PathProgramCache]: Analyzing trace with hash -843423075, now seen corresponding path program 1 times [2021-12-07 01:26:43,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:26:43,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872497706] [2021-12-07 01:26:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:43,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:26:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:26:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:26:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:26:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:26:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:26:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:26:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:26:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:26:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:26:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:26:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:26:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-07 01:26:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-07 01:26:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-07 01:26:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-07 01:26:43,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:26:43,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872497706] [2021-12-07 01:26:43,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872497706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:26:43,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370059119] [2021-12-07 01:26:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:43,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:26:43,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:26:43,660 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:26:43,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 01:26:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:26:43,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-07 01:26:44,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:44,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:26:44,134 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:26:44,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:26:44,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:44,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:44,357 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-12-07 01:26:44,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 34 treesize of output 45 [2021-12-07 01:26:44,468 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 0 case distinctions, treesize of input 22 treesize of output 27 [2021-12-07 01:26:44,489 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 0 case distinctions, treesize of input 22 treesize of output 27 [2021-12-07 01:26:45,094 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 0 case distinctions, treesize of input 22 treesize of output 27 [2021-12-07 01:26:45,099 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 0 case distinctions, treesize of input 22 treesize of output 27 [2021-12-07 01:26:45,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:45,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:45,236 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-12-07 01:26:45,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 32 treesize of output 57 [2021-12-07 01:26:55,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:55,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:55,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:55,301 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-12-07 01:26:55,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 35 [2021-12-07 01:26:55,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:26:55,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:55,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-12-07 01:26:55,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:26:55,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:55,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-12-07 01:26:55,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-12-07 01:26:55,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:26:55,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-12-07 01:26:55,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:26:56,618 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_37| Int)) (and (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_22|) 8) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_37|) 8)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_37| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_22|)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_22|) 8) (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_37|) 8)))) is different from true [2021-12-07 01:27:03,237 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_23| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_38| Int)) (and (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_23|) 8) (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_38|) 8)) (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_23|) 8) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_38|) 8)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_38| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_23|)))) is different from true [2021-12-07 01:27:09,527 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_39| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_24| Int)) (and (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_24|) 8) (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_39|) 8)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_39| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_24|)) (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_39|) 8) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_24|) 8)))) is different from true [2021-12-07 01:27:11,667 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_25| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_40| Int)) (and (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_25|) 8) (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_40|) 8)) (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_25|) 8) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_40|) 8)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_40| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_25|)))) is different from true [2021-12-07 01:27:14,031 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.offset_BEFORE_CALL_17| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_41| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_38| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_17| Int)) (let ((.cse0 (+ |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.offset_BEFORE_CALL_17| 8)) (.cse2 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_38|) 8)) (.cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_38|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_17|) .cse0) .cse1) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_41| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_17|)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_41| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_38|)) (= .cse2 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_17|) .cse0)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_38| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_17|)) (= .cse2 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_41|) 8)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_41|) 8) .cse1)))) is different from true [2021-12-07 01:27:16,515 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.offset_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_42| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_38| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_38|) 8)) (.cse1 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_38|) 8)) (.cse2 (+ |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.offset_BEFORE_CALL_18| 8))) (and (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_42|) 8) .cse0) (= .cse1 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_42|) 8)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_18|) .cse2) .cse0) (= .cse1 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_18|) .cse2)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_42| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_18|)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_38| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_18|)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_42| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_38|))))) is different from true [2021-12-07 01:27:16,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-12-07 01:27:16,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-12-07 01:27:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 34 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 72 not checked. [2021-12-07 01:27:19,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:27:21,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370059119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:27:21,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:27:21,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 35] total 50 [2021-12-07 01:27:21,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510781908] [2021-12-07 01:27:21,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:27:21,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 01:27:21,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:27:21,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 01:27:21,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2196, Unknown=8, NotChecked=594, Total=2970 [2021-12-07 01:27:21,404 INFO L87 Difference]: Start difference. First operand 223 states and 260 transitions. Second operand has 50 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 44 states have internal predecessors, (139), 17 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 14 states have call predecessors, (27), 16 states have call successors, (27) [2021-12-07 01:29:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:40,851 INFO L93 Difference]: Finished difference Result 351 states and 409 transitions. [2021-12-07 01:29:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-07 01:29:40,852 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 44 states have internal predecessors, (139), 17 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 14 states have call predecessors, (27), 16 states have call successors, (27) Word has length 120 [2021-12-07 01:29:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:40,853 INFO L225 Difference]: With dead ends: 351 [2021-12-07 01:29:40,853 INFO L226 Difference]: Without dead ends: 255 [2021-12-07 01:29:40,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 133 SyntacticMatches, 16 SemanticMatches, 90 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 172.5s TimeCoverageRelationStatistics Valid=442, Invalid=6850, Unknown=42, NotChecked=1038, Total=8372 [2021-12-07 01:29:40,854 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 110 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 2785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2016 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:40,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1588 Invalid, 2785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 694 Invalid, 0 Unknown, 2016 Unchecked, 0.5s Time] [2021-12-07 01:29:40,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-07 01:29:40,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 245. [2021-12-07 01:29:40,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 171 states have (on average 1.064327485380117) internal successors, (182), 174 states have internal predecessors, (182), 49 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (50), 45 states have call predecessors, (50), 46 states have call successors, (50) [2021-12-07 01:29:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 281 transitions. [2021-12-07 01:29:40,880 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 281 transitions. Word has length 120 [2021-12-07 01:29:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:40,881 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 281 transitions. [2021-12-07 01:29:40,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 44 states have internal predecessors, (139), 17 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 14 states have call predecessors, (27), 16 states have call successors, (27) [2021-12-07 01:29:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 281 transitions. [2021-12-07 01:29:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-07 01:29:40,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:40,882 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-07 01:29:40,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-07 01:29:41,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-07 01:29:41,083 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:41,084 INFO L85 PathProgramCache]: Analyzing trace with hash 134496030, now seen corresponding path program 1 times [2021-12-07 01:29:41,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:41,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748456853] [2021-12-07 01:29:41,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:41,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:29:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:29:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:29:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:29:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:29:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:29:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:29:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:29:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:29:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:29:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:29:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:29:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:29:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-07 01:29:41,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:41,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748456853] [2021-12-07 01:29:41,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748456853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:41,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:41,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-07 01:29:41,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889820238] [2021-12-07 01:29:41,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:41,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 01:29:41,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:41,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 01:29:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:29:41,889 INFO L87 Difference]: Start difference. First operand 245 states and 281 transitions. Second operand has 22 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-07 01:29:43,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:43,006 INFO L93 Difference]: Finished difference Result 281 states and 326 transitions. [2021-12-07 01:29:43,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-07 01:29:43,007 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 122 [2021-12-07 01:29:43,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:43,008 INFO L225 Difference]: With dead ends: 281 [2021-12-07 01:29:43,008 INFO L226 Difference]: Without dead ends: 250 [2021-12-07 01:29:43,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 01:29:43,009 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 151 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:43,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 338 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 01:29:43,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-07 01:29:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 237. [2021-12-07 01:29:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 164 states have (on average 1.0609756097560976) internal successors, (174), 166 states have internal predecessors, (174), 49 states have call successors, (49), 25 states have call predecessors, (49), 23 states have return successors, (49), 45 states have call predecessors, (49), 46 states have call successors, (49) [2021-12-07 01:29:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 272 transitions. [2021-12-07 01:29:43,035 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 272 transitions. Word has length 122 [2021-12-07 01:29:43,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:43,036 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 272 transitions. [2021-12-07 01:29:43,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-07 01:29:43,036 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 272 transitions. [2021-12-07 01:29:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-07 01:29:43,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:43,037 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-07 01:29:43,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-07 01:29:43,037 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:43,037 INFO L85 PathProgramCache]: Analyzing trace with hash -188751515, now seen corresponding path program 1 times [2021-12-07 01:29:43,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:43,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694122690] [2021-12-07 01:29:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:43,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:29:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:29:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:29:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:29:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:29:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:29:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:29:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:29:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:29:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:29:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:29:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:29:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:29:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-07 01:29:43,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:43,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694122690] [2021-12-07 01:29:43,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694122690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:43,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:43,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-07 01:29:43,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583966304] [2021-12-07 01:29:43,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:43,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:29:43,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:43,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:29:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:29:43,295 INFO L87 Difference]: Start difference. First operand 237 states and 272 transitions. Second operand has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-07 01:29:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:43,679 INFO L93 Difference]: Finished difference Result 243 states and 277 transitions. [2021-12-07 01:29:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:29:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (14), 3 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 124 [2021-12-07 01:29:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:43,680 INFO L225 Difference]: With dead ends: 243 [2021-12-07 01:29:43,680 INFO L226 Difference]: Without dead ends: 241 [2021-12-07 01:29:43,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:29:43,681 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 51 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:43,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 807 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:29:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-07 01:29:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-12-07 01:29:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 167 states have (on average 1.0598802395209581) internal successors, (177), 169 states have internal predecessors, (177), 49 states have call successors, (49), 26 states have call predecessors, (49), 24 states have return successors, (49), 45 states have call predecessors, (49), 46 states have call successors, (49) [2021-12-07 01:29:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 275 transitions. [2021-12-07 01:29:43,708 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 275 transitions. Word has length 124 [2021-12-07 01:29:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:43,708 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 275 transitions. [2021-12-07 01:29:43,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-07 01:29:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 275 transitions. [2021-12-07 01:29:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 01:29:43,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:43,709 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:43,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-07 01:29:43,709 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:43,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:43,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1413159472, now seen corresponding path program 3 times [2021-12-07 01:29:43,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:43,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156889039] [2021-12-07 01:29:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:43,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:29:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:29:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:29:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:29:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:29:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:29:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:29:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:29:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:29:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:29:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:29:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:29:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:29:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-07 01:29:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-07 01:29:44,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:44,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156889039] [2021-12-07 01:29:44,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156889039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:44,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:44,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-12-07 01:29:44,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603420708] [2021-12-07 01:29:44,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:44,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 01:29:44,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:44,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 01:29:44,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:29:44,542 INFO L87 Difference]: Start difference. First operand 241 states and 275 transitions. Second operand has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 8 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-07 01:29:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:46,839 INFO L93 Difference]: Finished difference Result 261 states and 300 transitions. [2021-12-07 01:29:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 01:29:46,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 8 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 126 [2021-12-07 01:29:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:46,840 INFO L225 Difference]: With dead ends: 261 [2021-12-07 01:29:46,840 INFO L226 Difference]: Without dead ends: 259 [2021-12-07 01:29:46,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 01:29:46,841 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 62 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:46,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 604 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 01:29:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-07 01:29:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 247. [2021-12-07 01:29:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 171 states have (on average 1.064327485380117) internal successors, (182), 174 states have internal predecessors, (182), 50 states have call successors, (50), 27 states have call predecessors, (50), 25 states have return successors, (50), 45 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-07 01:29:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 282 transitions. [2021-12-07 01:29:46,869 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 282 transitions. Word has length 126 [2021-12-07 01:29:46,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:46,869 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 282 transitions. [2021-12-07 01:29:46,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 8 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-07 01:29:46,870 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 282 transitions. [2021-12-07 01:29:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 01:29:46,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:46,870 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:46,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-07 01:29:46,871 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:46,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1453834222, now seen corresponding path program 2 times [2021-12-07 01:29:46,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:46,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579090880] [2021-12-07 01:29:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:46,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:29:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:29:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:29:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:29:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:29:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:29:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:29:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:29:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:29:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:29:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:29:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:29:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:29:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-07 01:29:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-07 01:29:47,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:47,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579090880] [2021-12-07 01:29:47,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579090880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:47,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:47,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-07 01:29:47,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836450937] [2021-12-07 01:29:47,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:47,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:29:47,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:47,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:29:47,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:29:47,571 INFO L87 Difference]: Start difference. First operand 247 states and 282 transitions. Second operand has 18 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 9 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-07 01:29:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:48,604 INFO L93 Difference]: Finished difference Result 263 states and 300 transitions. [2021-12-07 01:29:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:29:48,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 9 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) Word has length 126 [2021-12-07 01:29:48,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:48,606 INFO L225 Difference]: With dead ends: 263 [2021-12-07 01:29:48,606 INFO L226 Difference]: Without dead ends: 261 [2021-12-07 01:29:48,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:29:48,606 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 67 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:48,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 511 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 01:29:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-07 01:29:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 236. [2021-12-07 01:29:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 163 states have (on average 1.0613496932515338) internal successors, (173), 167 states have internal predecessors, (173), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (48), 43 states have call predecessors, (48), 45 states have call successors, (48) [2021-12-07 01:29:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 269 transitions. [2021-12-07 01:29:48,635 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 269 transitions. Word has length 126 [2021-12-07 01:29:48,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:48,635 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 269 transitions. [2021-12-07 01:29:48,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 9 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-07 01:29:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 269 transitions. [2021-12-07 01:29:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 01:29:48,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:48,636 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:48,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-07 01:29:48,636 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1440726182, now seen corresponding path program 1 times [2021-12-07 01:29:48,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:48,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353104582] [2021-12-07 01:29:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:48,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:29:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:29:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:29:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:29:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:29:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:29:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:29:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:29:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:29:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:29:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:29:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:29:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:29:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-07 01:29:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-07 01:29:49,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:49,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353104582] [2021-12-07 01:29:49,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353104582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:49,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992080470] [2021-12-07 01:29:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:49,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:49,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:49,458 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:49,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 01:29:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 2782 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 01:29:49,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:49,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-12-07 01:29:49,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-07 01:29:49,935 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:29:49,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:29:49,939 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 [2021-12-07 01:29:52,531 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-12-07 01:29:52,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 41 [2021-12-07 01:29:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 47 proven. 25 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-07 01:29:52,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:29:53,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:29:53,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-07 01:29:53,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:29:53,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-12-07 01:29:53,084 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 37 treesize of output 29 [2021-12-07 01:29:53,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:29:53,092 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 50 treesize of output 50 [2021-12-07 01:29:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-07 01:29:53,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992080470] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:29:53,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:29:53,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 15] total 40 [2021-12-07 01:29:53,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784634462] [2021-12-07 01:29:53,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:29:53,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-07 01:29:53,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:53,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-07 01:29:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1433, Unknown=1, NotChecked=0, Total=1560 [2021-12-07 01:29:53,291 INFO L87 Difference]: Start difference. First operand 236 states and 269 transitions. Second operand has 40 states, 37 states have (on average 2.810810810810811) internal successors, (104), 38 states have internal predecessors, (104), 17 states have call successors, (34), 4 states have call predecessors, (34), 6 states have return successors, (33), 13 states have call predecessors, (33), 16 states have call successors, (33) [2021-12-07 01:30:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:02,015 INFO L93 Difference]: Finished difference Result 315 states and 365 transitions. [2021-12-07 01:30:02,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-07 01:30:02,016 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 2.810810810810811) internal successors, (104), 38 states have internal predecessors, (104), 17 states have call successors, (34), 4 states have call predecessors, (34), 6 states have return successors, (33), 13 states have call predecessors, (33), 16 states have call successors, (33) Word has length 126 [2021-12-07 01:30:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:02,017 INFO L225 Difference]: With dead ends: 315 [2021-12-07 01:30:02,017 INFO L226 Difference]: Without dead ends: 300 [2021-12-07 01:30:02,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=400, Invalid=3505, Unknown=1, NotChecked=0, Total=3906 [2021-12-07 01:30:02,018 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 209 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:02,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1159 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2504 Invalid, 0 Unknown, 275 Unchecked, 2.6s Time] [2021-12-07 01:30:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-07 01:30:02,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 252. [2021-12-07 01:30:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 179 states have (on average 1.0614525139664805) internal successors, (190), 184 states have internal predecessors, (190), 45 states have call successors, (45), 27 states have call predecessors, (45), 27 states have return successors, (45), 40 states have call predecessors, (45), 42 states have call successors, (45) [2021-12-07 01:30:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 280 transitions. [2021-12-07 01:30:02,046 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 280 transitions. Word has length 126 [2021-12-07 01:30:02,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:02,047 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 280 transitions. [2021-12-07 01:30:02,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 2.810810810810811) internal successors, (104), 38 states have internal predecessors, (104), 17 states have call successors, (34), 4 states have call predecessors, (34), 6 states have return successors, (33), 13 states have call predecessors, (33), 16 states have call successors, (33) [2021-12-07 01:30:02,047 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 280 transitions. [2021-12-07 01:30:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 01:30:02,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:02,048 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:02,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-07 01:30:02,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-07 01:30:02,249 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:02,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:02,250 INFO L85 PathProgramCache]: Analyzing trace with hash 111840998, now seen corresponding path program 2 times [2021-12-07 01:30:02,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:02,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609391381] [2021-12-07 01:30:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:02,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:30:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:30:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:30:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:30:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:30:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:30:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:30:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:30:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:30:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:30:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:30:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:30:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:30:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-07 01:30:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 54 proven. 5 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-07 01:30:02,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:02,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609391381] [2021-12-07 01:30:02,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609391381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:02,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110820831] [2021-12-07 01:30:02,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:30:02,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:02,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:30:02,654 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:30:02,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 01:30:03,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:30:03,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:30:03,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 2782 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-07 01:30:03,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:03,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:30:04,015 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:30:04,015 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 [2021-12-07 01:30:04,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:30:04,148 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-07 01:30:04,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-07 01:30:04,187 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 0 case distinctions, treesize of input 18 treesize of output 23 [2021-12-07 01:30:05,361 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_79| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_45| Int)) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_79|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_45|) 0)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_79| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_45|)))) is different from true [2021-12-07 01:30:05,436 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 0 case distinctions, treesize of input 18 treesize of output 23 [2021-12-07 01:30:06,648 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_46| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_46| |v_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base_BEFORE_CALL_45|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base_BEFORE_CALL_45|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_46|) 0)))) is different from true [2021-12-07 01:30:13,462 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base_BEFORE_CALL_46| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_47| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_47| |v_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base_BEFORE_CALL_46|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base_BEFORE_CALL_46|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_47|) 0)))) is different from true [2021-12-07 01:30:13,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 18 [2021-12-07 01:30:13,655 INFO L354 Elim1Store]: treesize reduction 23, result has 45.2 percent of original size [2021-12-07 01:30:13,655 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 35 treesize of output 43 [2021-12-07 01:30:13,659 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 8 treesize of output 7 [2021-12-07 01:30:13,662 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-07 01:30:13,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 01:30:13,681 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 [2021-12-07 01:30:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 25 proven. 51 refuted. 3 times theorem prover too weak. 4 trivial. 47 not checked. [2021-12-07 01:30:19,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:30:20,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:30:20,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-12-07 01:30:20,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:30:20,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2021-12-07 01:30:20,340 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_arrayElimArr_22 (Array Int Int)) (|ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| Int) (v_arrayElimArr_21 (Array Int Int)) (aux_div_v_ArrVal_3737_40 Int)) (let ((.cse0 (store (store |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_arrayElimArr_21) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base| v_arrayElimArr_22))) (or (= (mod (select (select .cse0 |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset|) 18446744073709551616) 0) (not (= |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1| (select v_arrayElimArr_21 |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset|))) (<= (mod |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~len~2#1| 18446744073709551616) (mod (select (select .cse0 |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.offset|) 18446744073709551616)) (not (= (* 18446744073709551616 aux_div_v_ArrVal_3737_40) (select v_arrayElimArr_22 |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|)))))) |c_ULTIMATE.start_aws_byte_cursor_advance_#t~short1082#1|) is different from false [2021-12-07 01:30:20,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110820831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:20,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:30:20,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 34] total 43 [2021-12-07 01:30:20,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447236324] [2021-12-07 01:30:20,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:30:20,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-07 01:30:20,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-07 01:30:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2858, Unknown=10, NotChecked=444, Total=3540 [2021-12-07 01:30:20,845 INFO L87 Difference]: Start difference. First operand 252 states and 280 transitions. Second operand has 43 states, 40 states have (on average 3.75) internal successors, (150), 39 states have internal predecessors, (150), 13 states have call successors, (29), 10 states have call predecessors, (29), 12 states have return successors, (28), 11 states have call predecessors, (28), 13 states have call successors, (28) [2021-12-07 01:32:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:32:42,720 INFO L93 Difference]: Finished difference Result 334 states and 376 transitions. [2021-12-07 01:32:42,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-07 01:32:42,720 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 3.75) internal successors, (150), 39 states have internal predecessors, (150), 13 states have call successors, (29), 10 states have call predecessors, (29), 12 states have return successors, (28), 11 states have call predecessors, (28), 13 states have call successors, (28) Word has length 126 [2021-12-07 01:32:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:32:42,721 INFO L225 Difference]: With dead ends: 334 [2021-12-07 01:32:42,721 INFO L226 Difference]: Without dead ends: 292 [2021-12-07 01:32:42,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 150 SyntacticMatches, 19 SemanticMatches, 93 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 156.3s TimeCoverageRelationStatistics Valid=640, Invalid=7489, Unknown=77, NotChecked=724, Total=8930 [2021-12-07 01:32:42,722 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 110 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 3681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2159 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:32:42,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 1629 Invalid, 3681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1456 Invalid, 0 Unknown, 2159 Unchecked, 1.0s Time] [2021-12-07 01:32:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-07 01:32:42,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 269. [2021-12-07 01:32:42,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 193 states have (on average 1.0569948186528497) internal successors, (204), 197 states have internal predecessors, (204), 47 states have call successors, (47), 29 states have call predecessors, (47), 28 states have return successors, (46), 42 states have call predecessors, (46), 44 states have call successors, (46) [2021-12-07 01:32:42,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 297 transitions. [2021-12-07 01:32:42,753 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 297 transitions. Word has length 126 [2021-12-07 01:32:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:32:42,753 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 297 transitions. [2021-12-07 01:32:42,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 3.75) internal successors, (150), 39 states have internal predecessors, (150), 13 states have call successors, (29), 10 states have call predecessors, (29), 12 states have return successors, (28), 11 states have call predecessors, (28), 13 states have call successors, (28) [2021-12-07 01:32:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 297 transitions. [2021-12-07 01:32:42,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 01:32:42,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:32:42,754 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:32:42,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-07 01:32:42,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-07 01:32:42,955 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:32:42,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:32:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash 152242222, now seen corresponding path program 1 times [2021-12-07 01:32:42,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:32:42,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043778464] [2021-12-07 01:32:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:32:42,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:32:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:32:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:32:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:32:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:32:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:32:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:32:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:32:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:32:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:32:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:32:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:32:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:32:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:32:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-07 01:32:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-07 01:32:43,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:32:43,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043778464] [2021-12-07 01:32:43,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043778464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:32:43,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:32:43,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-07 01:32:43,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330265396] [2021-12-07 01:32:43,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:32:43,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:32:43,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:32:43,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:32:43,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:32:43,738 INFO L87 Difference]: Start difference. First operand 269 states and 297 transitions. Second operand has 21 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-07 01:32:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:32:45,599 INFO L93 Difference]: Finished difference Result 293 states and 326 transitions. [2021-12-07 01:32:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:32:45,599 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 126 [2021-12-07 01:32:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:32:45,600 INFO L225 Difference]: With dead ends: 293 [2021-12-07 01:32:45,600 INFO L226 Difference]: Without dead ends: 291 [2021-12-07 01:32:45,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 01:32:45,601 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 79 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:32:45,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 619 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-07 01:32:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-07 01:32:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 267. [2021-12-07 01:32:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 192 states have (on average 1.0520833333333333) internal successors, (202), 195 states have internal predecessors, (202), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (45), 42 states have call predecessors, (45), 43 states have call successors, (45) [2021-12-07 01:32:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 293 transitions. [2021-12-07 01:32:45,632 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 293 transitions. Word has length 126 [2021-12-07 01:32:45,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:32:45,632 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 293 transitions. [2021-12-07 01:32:45,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-07 01:32:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 293 transitions. [2021-12-07 01:32:45,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-07 01:32:45,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:32:45,633 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:32:45,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-07 01:32:45,633 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:32:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:32:45,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1346349573, now seen corresponding path program 1 times [2021-12-07 01:32:45,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:32:45,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680218256] [2021-12-07 01:32:45,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:32:45,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:32:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:45,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:32:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:45,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:32:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:45,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:32:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:45,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:32:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:46,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:32:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:46,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:32:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:46,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:32:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:46,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:32:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:46,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:32:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:46,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:32:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:46,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:32:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:46,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:32:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:46,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:32:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:46,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-07 01:32:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:46,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-07 01:32:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-07 01:32:46,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:32:46,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680218256] [2021-12-07 01:32:46,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680218256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:32:46,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:32:46,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-07 01:32:46,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137898004] [2021-12-07 01:32:46,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:32:46,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:32:46,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:32:46,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:32:46,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:32:46,088 INFO L87 Difference]: Start difference. First operand 267 states and 293 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 9 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-07 01:32:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:32:47,021 INFO L93 Difference]: Finished difference Result 283 states and 311 transitions. [2021-12-07 01:32:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 01:32:47,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 9 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) Word has length 132 [2021-12-07 01:32:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:32:47,027 INFO L225 Difference]: With dead ends: 283 [2021-12-07 01:32:47,027 INFO L226 Difference]: Without dead ends: 270 [2021-12-07 01:32:47,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-12-07 01:32:47,028 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 80 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:32:47,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 414 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 01:32:47,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-07 01:32:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 266. [2021-12-07 01:32:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 191 states have (on average 1.0471204188481675) internal successors, (200), 194 states have internal predecessors, (200), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (45), 42 states have call predecessors, (45), 43 states have call successors, (45) [2021-12-07 01:32:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 291 transitions. [2021-12-07 01:32:47,059 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 291 transitions. Word has length 132 [2021-12-07 01:32:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:32:47,059 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 291 transitions. [2021-12-07 01:32:47,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 9 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-07 01:32:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 291 transitions. [2021-12-07 01:32:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-07 01:32:47,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:32:47,060 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:32:47,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-07 01:32:47,060 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:32:47,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:32:47,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2025621827, now seen corresponding path program 1 times [2021-12-07 01:32:47,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:32:47,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298428987] [2021-12-07 01:32:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:32:47,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:32:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:32:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:32:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:32:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:32:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:32:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:32:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:32:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:32:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:32:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:32:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:32:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:32:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:32:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-07 01:32:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-07 01:32:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-07 01:32:47,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:32:47,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298428987] [2021-12-07 01:32:47,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298428987] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:32:47,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306400050] [2021-12-07 01:32:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:32:47,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:32:47,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:32:47,840 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:32:47,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-07 01:32:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:48,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 2797 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-07 01:32:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:32:48,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-12-07 01:32:48,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-07 01:32:48,299 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:32:48,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:32:48,303 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 [2021-12-07 01:32:53,100 INFO L354 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2021-12-07 01:32:53,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 34 [2021-12-07 01:32:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 69 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 01:32:53,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:32:53,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306400050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:32:53,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:32:53,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 44 [2021-12-07 01:32:53,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79412] [2021-12-07 01:32:53,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:32:53,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-07 01:32:53,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:32:53,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-07 01:32:53,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2374, Unknown=1, NotChecked=0, Total=2550 [2021-12-07 01:32:53,686 INFO L87 Difference]: Start difference. First operand 266 states and 291 transitions. Second operand has 44 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 17 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (30), 14 states have call predecessors, (30), 15 states have call successors, (30) [2021-12-07 01:32:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:32:55,713 INFO L93 Difference]: Finished difference Result 319 states and 350 transitions. [2021-12-07 01:32:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-07 01:32:55,713 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 17 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (30), 14 states have call predecessors, (30), 15 states have call successors, (30) Word has length 132 [2021-12-07 01:32:55,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:32:55,714 INFO L225 Difference]: With dead ends: 319 [2021-12-07 01:32:55,715 INFO L226 Difference]: Without dead ends: 317 [2021-12-07 01:32:55,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 156 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=396, Invalid=5153, Unknown=1, NotChecked=0, Total=5550 [2021-12-07 01:32:55,715 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 157 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 2462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:32:55,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1378 Invalid, 2462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1958 Invalid, 0 Unknown, 327 Unchecked, 1.2s Time] [2021-12-07 01:32:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-07 01:32:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 292. [2021-12-07 01:32:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 210 states have (on average 1.042857142857143) internal successors, (219), 214 states have internal predecessors, (219), 48 states have call successors, (48), 34 states have call predecessors, (48), 33 states have return successors, (47), 43 states have call predecessors, (47), 45 states have call successors, (47) [2021-12-07 01:32:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 314 transitions. [2021-12-07 01:32:55,751 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 314 transitions. Word has length 132 [2021-12-07 01:32:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:32:55,751 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 314 transitions. [2021-12-07 01:32:55,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 17 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (30), 14 states have call predecessors, (30), 15 states have call successors, (30) [2021-12-07 01:32:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 314 transitions. [2021-12-07 01:32:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-07 01:32:55,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:32:55,752 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:32:55,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-07 01:32:55,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:32:55,953 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:32:55,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:32:55,953 INFO L85 PathProgramCache]: Analyzing trace with hash 149782773, now seen corresponding path program 3 times [2021-12-07 01:32:55,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:32:55,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566600150] [2021-12-07 01:32:55,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:32:55,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:32:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:57,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:32:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:57,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:32:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:32:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:32:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:32:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:32:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:32:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:32:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:32:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:32:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:32:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:32:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:32:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-07 01:32:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-07 01:32:58,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:32:58,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566600150] [2021-12-07 01:32:58,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566600150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:32:58,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:32:58,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-07 01:32:58,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493883509] [2021-12-07 01:32:58,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:32:58,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 01:32:58,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:32:58,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 01:32:58,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:32:58,115 INFO L87 Difference]: Start difference. First operand 292 states and 314 transitions. Second operand has 20 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 9 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-07 01:33:01,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 01:33:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:03,463 INFO L93 Difference]: Finished difference Result 304 states and 325 transitions. [2021-12-07 01:33:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:33:03,464 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 9 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 132 [2021-12-07 01:33:03,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:03,465 INFO L225 Difference]: With dead ends: 304 [2021-12-07 01:33:03,465 INFO L226 Difference]: Without dead ends: 289 [2021-12-07 01:33:03,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:33:03,465 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 88 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 130 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:03,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 279 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 895 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-12-07 01:33:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-07 01:33:03,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-12-07 01:33:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 209 states have (on average 1.0382775119617225) internal successors, (217), 212 states have internal predecessors, (217), 46 states have call successors, (46), 34 states have call predecessors, (46), 33 states have return successors, (45), 42 states have call predecessors, (45), 43 states have call successors, (45) [2021-12-07 01:33:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 308 transitions. [2021-12-07 01:33:03,498 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 308 transitions. Word has length 132 [2021-12-07 01:33:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:03,498 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 308 transitions. [2021-12-07 01:33:03,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 9 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-07 01:33:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 308 transitions. [2021-12-07 01:33:03,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-07 01:33:03,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:03,499 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:03,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-07 01:33:03,499 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:03,499 INFO L85 PathProgramCache]: Analyzing trace with hash 340723670, now seen corresponding path program 1 times [2021-12-07 01:33:03,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:33:03,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486148838] [2021-12-07 01:33:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:03,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:33:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:05,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:33:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:05,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:33:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:05,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:33:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:05,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:33:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:05,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:33:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:05,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:33:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:06,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:33:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:06,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:33:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:06,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:33:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:06,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:33:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:06,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:33:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:06,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:33:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:06,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:33:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:06,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-07 01:33:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:06,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-07 01:33:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:06,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-07 01:33:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-07 01:33:06,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:33:06,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486148838] [2021-12-07 01:33:06,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486148838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:33:06,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49773159] [2021-12-07 01:33:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:06,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:33:06,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:33:06,244 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:33:06,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-07 01:33:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:06,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 2814 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-07 01:33:06,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:06,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:33:06,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:06,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:06,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:33:06,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:06,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:33:06,850 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-07 01:33:06,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 45 [2021-12-07 01:33:06,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:33:06,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:33:06,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:06,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:06,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:06,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:33:06,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:33:06,889 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-12-07 01:33:06,889 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 2 case distinctions, treesize of input 60 treesize of output 37 [2021-12-07 01:33:12,063 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-12-07 01:33:12,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-12-07 01:33:14,086 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_85| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_85|) 8)) (.cse0 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_45|) 8))) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_85| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_45|)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_85|) 8) (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_BEFORE_CALL_45|) 8)) (<= .cse0 .cse1) (<= (mod (+ (* .cse0 18446744073709551615) .cse1) 18446744073709551616) 9223372036854775807) (< .cse1 (+ 18446744073709551616 .cse0))))) is different from true [2021-12-07 01:33:24,643 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.offset_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_27| Int) (|aux_div_aux_mod_v_ULTIMATE.start_aws_byte_cursor_advance_harness_~len~2#1_BEFORE_CALL_136_102_114| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_86| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_49| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_86|) 8))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_49|) 8)) (.cse4 (+ |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.offset_BEFORE_CALL_27| 8)) (.cse1 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_49|) 8)) (.cse3 (+ .cse2 (* 18446744073709551616 |aux_div_aux_mod_v_ULTIMATE.start_aws_byte_cursor_advance_harness_~len~2#1_BEFORE_CALL_136_102_114|)))) (and (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_86|) 8)) (<= .cse1 .cse2) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_86| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_49|)) (< .cse2 (+ 18446744073709551616 .cse1)) (<= .cse3 (+ .cse1 9223372036854775807)) (= .cse1 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_27|) .cse4)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_27|) .cse4)) (<= .cse1 .cse3))))) is different from true [2021-12-07 01:33:27,400 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.offset_BEFORE_CALL_28| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_87| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_49| Int) (|aux_div_aux_mod_v_ULTIMATE.start_aws_byte_cursor_advance_harness_~len~2#1_BEFORE_CALL_137_102_114| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_28| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_87|) 8))) (let ((.cse1 (+ (* 18446744073709551616 |aux_div_aux_mod_v_ULTIMATE.start_aws_byte_cursor_advance_harness_~len~2#1_BEFORE_CALL_137_102_114|) .cse2)) (.cse0 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_49|) 8)) (.cse4 (+ |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.offset_BEFORE_CALL_28| 8)) (.cse3 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_49|) 8))) (and (<= .cse0 .cse1) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_87| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_49|)) (<= .cse0 .cse2) (= .cse3 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_87|) 8)) (<= .cse1 (+ .cse0 9223372036854775807)) (= .cse0 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_28|) .cse4)) (< .cse2 (+ 18446744073709551616 .cse0)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_BEFORE_CALL_28|) .cse4) .cse3))))) is different from true [2021-12-07 01:33:30,342 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.offset| Int) (|ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_88| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_49| Int)) (let ((.cse1 (+ 8 |ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.offset|)) (.cse3 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_88|) 8)) (.cse0 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_49|) 8)) (.cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_49|) 8))) (and (= .cse0 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base|) .cse1)) (= .cse2 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base|) .cse1)) (<= (mod (+ .cse3 (* .cse0 18446744073709551615)) 18446744073709551616) 9223372036854775807) (<= .cse0 .cse3) (< .cse3 (+ 18446744073709551616 .cse0)) (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_88| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_49|)) (= .cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_88|) 8))))) is different from true [2021-12-07 01:33:49,351 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.offset_BEFORE_CALL_61| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.offset_21| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_89| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_50| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_61| Int) (|v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_21| Int) (|aux_div_aux_mod_v_ULTIMATE.start_aws_byte_cursor_advance_harness_~len~2#1_BEFORE_CALL_139_102_114| Int)) (let ((.cse4 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_89|) 8)) (.cse7 (+ 8 |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.offset_21|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_21|) .cse7)) (.cse6 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#rv~14#1.base_21|) .cse7)) (.cse2 (+ 8 |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.offset_BEFORE_CALL_61|)) (.cse1 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_50|) 8)) (.cse0 (+ .cse4 (* 18446744073709551616 |aux_div_aux_mod_v_ULTIMATE.start_aws_byte_cursor_advance_harness_~len~2#1_BEFORE_CALL_139_102_114|))) (.cse5 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_50|) 8))) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_89| |v_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base_50|)) (<= .cse0 (+ 9223372036854775807 .cse1)) (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_61|) .cse2) .cse3) (< .cse4 (+ 18446744073709551616 .cse1)) (= .cse3 .cse1) (= .cse5 .cse6) (<= .cse1 .cse4) (= .cse6 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#old~0#1.base_BEFORE_CALL_61|) .cse2)) (<= .cse1 .cse0) (= .cse5 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_advance_harness_~#cursor~2#1.base_BEFORE_CALL_89|) 8)))))) is different from true [2021-12-07 01:33:50,274 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-12-07 01:33:50,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 16 [2021-12-07 01:33:50,299 INFO L354 Elim1Store]: treesize reduction 48, result has 34.2 percent of original size [2021-12-07 01:33:50,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 44 [2021-12-07 01:33:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 59 proven. 14 refuted. 0 times theorem prover too weak. 39 trivial. 50 not checked. [2021-12-07 01:33:50,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:58,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49773159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:33:58,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:33:58,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35] total 63 [2021-12-07 01:33:58,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129360920] [2021-12-07 01:33:58,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:33:58,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-07 01:33:58,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:33:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-07 01:33:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=4181, Unknown=16, NotChecked=670, Total=5112 [2021-12-07 01:33:58,244 INFO L87 Difference]: Start difference. First operand 289 states and 308 transitions. Second operand has 63 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 54 states have internal predecessors, (122), 22 states have call successors, (34), 9 states have call predecessors, (34), 12 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-12-07 01:36:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:36:02,791 INFO L93 Difference]: Finished difference Result 319 states and 342 transitions. [2021-12-07 01:36:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-07 01:36:02,792 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 54 states have internal predecessors, (122), 22 states have call successors, (34), 9 states have call predecessors, (34), 12 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) Word has length 138 [2021-12-07 01:36:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:36:02,793 INFO L225 Difference]: With dead ends: 319 [2021-12-07 01:36:02,793 INFO L226 Difference]: Without dead ends: 317 [2021-12-07 01:36:02,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 145 SyntacticMatches, 12 SemanticMatches, 119 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 4023 ImplicationChecksByTransitivity, 172.0s TimeCoverageRelationStatistics Valid=731, Invalid=12565, Unknown=64, NotChecked=1160, Total=14520 [2021-12-07 01:36:02,794 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 166 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1997 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 4277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1941 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:36:02,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 635 Invalid, 4277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1997 Invalid, 0 Unknown, 1941 Unchecked, 2.0s Time] [2021-12-07 01:36:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-07 01:36:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 303. [2021-12-07 01:36:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 221 states have (on average 1.0361990950226245) internal successors, (229), 224 states have internal predecessors, (229), 47 states have call successors, (47), 35 states have call predecessors, (47), 34 states have return successors, (46), 43 states have call predecessors, (46), 44 states have call successors, (46) [2021-12-07 01:36:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 322 transitions. [2021-12-07 01:36:02,830 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 322 transitions. Word has length 138 [2021-12-07 01:36:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:36:02,830 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 322 transitions. [2021-12-07 01:36:02,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 54 states have internal predecessors, (122), 22 states have call successors, (34), 9 states have call predecessors, (34), 12 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-12-07 01:36:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 322 transitions. [2021-12-07 01:36:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-07 01:36:02,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:36:02,832 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:36:02,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-07 01:36:03,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:36:03,033 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:36:03,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:36:03,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2039245230, now seen corresponding path program 2 times [2021-12-07 01:36:03,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:36:03,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148688962] [2021-12-07 01:36:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:36:03,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:36:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:36:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:36:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:36:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:36:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:36:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:36:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:36:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:36:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:36:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 01:36:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:36:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:36:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:36:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-07 01:36:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-07 01:36:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-07 01:36:03,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:36:03,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148688962] [2021-12-07 01:36:03,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148688962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:36:03,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:36:03,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-07 01:36:03,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480165614] [2021-12-07 01:36:03,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:36:03,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 01:36:03,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:36:03,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:36:03,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:36:03,730 INFO L87 Difference]: Start difference. First operand 303 states and 322 transitions. Second operand has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 9 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-07 01:36:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:36:04,765 INFO L93 Difference]: Finished difference Result 316 states and 336 transitions. [2021-12-07 01:36:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:36:04,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 9 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 138 [2021-12-07 01:36:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:36:04,766 INFO L225 Difference]: With dead ends: 316 [2021-12-07 01:36:04,766 INFO L226 Difference]: Without dead ends: 314 [2021-12-07 01:36:04,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-12-07 01:36:04,767 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 98 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:36:04,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 457 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 01:36:04,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-07 01:36:04,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 307. [2021-12-07 01:36:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 224 states have (on average 1.0357142857142858) internal successors, (232), 227 states have internal predecessors, (232), 47 states have call successors, (47), 36 states have call predecessors, (47), 35 states have return successors, (46), 43 states have call predecessors, (46), 44 states have call successors, (46) [2021-12-07 01:36:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 325 transitions. [2021-12-07 01:36:04,803 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 325 transitions. Word has length 138 [2021-12-07 01:36:04,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:36:04,803 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 325 transitions. [2021-12-07 01:36:04,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 9 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-07 01:36:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 325 transitions. [2021-12-07 01:36:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-07 01:36:04,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:36:04,804 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:36:04,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-07 01:36:04,805 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:36:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:36:04,805 INFO L85 PathProgramCache]: Analyzing trace with hash -917825902, now seen corresponding path program 1 times [2021-12-07 01:36:04,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:36:04,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941715030] [2021-12-07 01:36:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:36:04,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:36:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:36:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 01:36:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:36:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-07 01:36:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 01:36:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 01:36:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-07 01:36:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:36:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-07 01:36:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 01:36:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-07 01:36:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 01:36:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:36:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-07 01:36:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-07 01:36:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-07 01:36:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-07 01:36:08,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:36:08,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941715030] [2021-12-07 01:36:08,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941715030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:36:08,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439403130] [2021-12-07 01:36:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:36:08,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:36:08,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:36:08,583 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:36:08,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_651ed769-affa-4281-b9d8-162c691ce10e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-07 01:36:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:09,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 2805 conjuncts, 208 conjunts are in the unsatisfiable core [2021-12-07 01:36:09,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:36:09,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:36:10,216 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:36:10,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:36:10,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:36:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:10,433 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 [2021-12-07 01:36:10,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:36:11,594 INFO L354 Elim1Store]: treesize reduction 154, result has 24.5 percent of original size [2021-12-07 01:36:11,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 71 [2021-12-07 01:36:11,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2021-12-07 01:36:11,941 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 25 [2021-12-07 01:36:11,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-12-07 01:36:13,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:13,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 90 [2021-12-07 01:36:13,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:13,570 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-12-07 01:36:13,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 114 treesize of output 108 [2021-12-07 01:36:13,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:13,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 135 [2021-12-07 01:36:13,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:13,936 INFO L354 Elim1Store]: treesize reduction 104, result has 32.0 percent of original size [2021-12-07 01:36:13,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 38 treesize of output 69 [2021-12-07 01:36:17,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:17,891 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-12-07 01:36:17,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 28 [2021-12-07 01:36:18,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:18,154 INFO L354 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2021-12-07 01:36:18,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 66 [2021-12-07 01:36:18,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 54 [2021-12-07 01:36:18,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 56 [2021-12-07 01:36:34,765 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:36:34,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 43 [2021-12-07 01:36:34,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-07 01:36:35,441 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-12-07 01:36:35,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 98 treesize of output 66 [2021-12-07 01:36:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 34 proven. 87 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-07 01:36:35,590 INFO L328 TraceCheckSpWp]: Computing backward predicates...