./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 8de283a79f01a407383b7daa040c59e7c5c73f52f0f9c705f7021a208716cd24 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 20:00:46,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 20:00:46,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 20:00:46,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 20:00:46,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 20:00:46,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 20:00:46,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 20:00:46,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 20:00:46,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 20:00:46,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 20:00:46,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 20:00:46,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 20:00:46,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 20:00:46,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 20:00:46,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 20:00:46,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 20:00:46,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 20:00:46,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 20:00:46,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 20:00:46,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 20:00:46,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 20:00:46,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 20:00:46,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 20:00:46,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 20:00:46,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 20:00:46,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 20:00:46,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 20:00:46,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 20:00:46,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 20:00:46,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 20:00:46,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 20:00:46,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 20:00:46,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 20:00:46,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 20:00:46,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 20:00:46,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 20:00:46,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 20:00:46,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 20:00:46,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 20:00:46,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 20:00:46,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 20:00:46,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 20:00:46,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 20:00:46,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 20:00:46,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 20:00:46,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 20:00:46,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 20:00:46,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 20:00:46,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 20:00:46,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 20:00:46,652 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 20:00:46,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 20:00:46,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 20:00:46,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 20:00:46,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 20:00:46,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 20:00:46,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 20:00:46,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 20:00:46,654 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 20:00:46,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 20:00:46,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 20:00:46,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 20:00:46,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 20:00:46,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:00:46,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 20:00:46,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 20:00:46,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 20:00:46,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 20:00:46,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 20:00:46,656 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 20:00:46,656 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 20:00:46,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 20:00:46,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 20:00:46,656 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8de283a79f01a407383b7daa040c59e7c5c73f52f0f9c705f7021a208716cd24 [2021-11-16 20:00:46,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 20:00:46,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 20:00:46,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 20:00:46,837 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 20:00:46,838 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 20:00:46,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i [2021-11-16 20:00:46,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88475cff9/a1c8ac541b7144ff8db81bb244b70b9e/FLAGfa0a2f615 [2021-11-16 20:00:47,502 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 20:00:47,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i [2021-11-16 20:00:47,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88475cff9/a1c8ac541b7144ff8db81bb244b70b9e/FLAGfa0a2f615 [2021-11-16 20:00:47,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88475cff9/a1c8ac541b7144ff8db81bb244b70b9e [2021-11-16 20:00:47,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 20:00:47,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 20:00:47,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 20:00:47,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 20:00:47,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 20:00:47,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:00:47" (1/1) ... [2021-11-16 20:00:47,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51c4a7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:47, skipping insertion in model container [2021-11-16 20:00:47,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:00:47" (1/1) ... [2021-11-16 20:00:47,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 20:00:48,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 20:00:48,197 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4498,4511] [2021-11-16 20:00:48,204 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4558,4571] [2021-11-16 20:00:48,222 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:00:48,228 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:00:48,956 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:48,957 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:48,958 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:48,958 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:48,959 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:48,980 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:48,981 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:48,982 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:48,984 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:49,402 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:00:49,403 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:00:49,404 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:00:49,405 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:00:49,406 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:00:49,407 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:00:49,407 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:00:49,424 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:00:49,425 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:00:49,425 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:00:49,633 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:00:49,761 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:49,762 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:49,855 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:00:49,910 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 20:00:49,941 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4498,4511] [2021-11-16 20:00:49,942 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4558,4571] [2021-11-16 20:00:49,944 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:00:49,944 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:00:50,000 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:50,000 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:50,001 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:50,002 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:50,002 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:50,007 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:50,008 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:50,009 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:50,009 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:50,048 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:00:50,063 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:00:50,064 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:00:50,065 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:00:50,065 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:00:50,065 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:00:50,066 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:00:50,066 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:00:50,066 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:00:50,067 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:00:50,096 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:00:50,165 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:50,165 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:00:50,259 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:00:50,438 INFO L208 MainTranslator]: Completed translation [2021-11-16 20:00:50,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:50 WrapperNode [2021-11-16 20:00:50,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 20:00:50,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 20:00:50,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 20:00:50,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 20:00:50,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:50" (1/1) ... [2021-11-16 20:00:50,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:50" (1/1) ... [2021-11-16 20:00:50,701 INFO L137 Inliner]: procedures = 693, calls = 2617, calls flagged for inlining = 58, calls inlined = 4, statements flattened = 770 [2021-11-16 20:00:50,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 20:00:50,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 20:00:50,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 20:00:50,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 20:00:50,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:50" (1/1) ... [2021-11-16 20:00:50,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:50" (1/1) ... [2021-11-16 20:00:50,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:50" (1/1) ... [2021-11-16 20:00:50,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:50" (1/1) ... [2021-11-16 20:00:50,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:50" (1/1) ... [2021-11-16 20:00:50,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:50" (1/1) ... [2021-11-16 20:00:50,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:50" (1/1) ... [2021-11-16 20:00:50,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 20:00:50,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 20:00:50,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 20:00:50,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 20:00:50,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:50" (1/1) ... [2021-11-16 20:00:50,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:00:50,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:00:50,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-16 20:00:50,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-16 20:00:50,950 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_ignore_case [2021-11-16 20:00:50,951 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_ignore_case [2021-11-16 20:00:50,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 20:00:50,951 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-16 20:00:50,952 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-16 20:00:50,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 20:00:50,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 20:00:50,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 20:00:50,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 20:00:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 20:00:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-16 20:00:50,954 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-16 20:00:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 20:00:50,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 20:00:50,955 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 20:00:50,955 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 20:00:50,955 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-16 20:00:50,955 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-16 20:00:50,955 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-16 20:00:50,955 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-16 20:00:50,955 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 20:00:50,956 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 20:00:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 20:00:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 20:00:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 20:00:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 20:00:51,325 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 20:00:51,328 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 20:00:52,645 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 20:00:52,649 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 20:00:52,650 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-16 20:00:52,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:00:52 BoogieIcfgContainer [2021-11-16 20:00:52,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 20:00:52,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 20:00:52,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 20:00:52,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 20:00:52,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:00:47" (1/3) ... [2021-11-16 20:00:52,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12bb1967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:00:52, skipping insertion in model container [2021-11-16 20:00:52,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:50" (2/3) ... [2021-11-16 20:00:52,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12bb1967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:00:52, skipping insertion in model container [2021-11-16 20:00:52,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:00:52" (3/3) ... [2021-11-16 20:00:52,657 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_eq_ignore_case_harness.i [2021-11-16 20:00:52,660 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 20:00:52,661 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 20:00:52,691 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 20:00:52,695 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 20:00:52,696 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 20:00:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 47 states have (on average 1.297872340425532) internal successors, (61), 51 states have internal predecessors, (61), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-16 20:00:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-16 20:00:52,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:00:52,712 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:00:52,713 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:00:52,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:00:52,717 INFO L85 PathProgramCache]: Analyzing trace with hash 106347311, now seen corresponding path program 1 times [2021-11-16 20:00:52,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:00:52,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101468045] [2021-11-16 20:00:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:00:52,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:00:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:53,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:00:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:53,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:00:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:53,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:00:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:53,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 20:00:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:53,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:00:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:53,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:00:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:53,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-16 20:00:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:53,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:00:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:53,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:00:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:53,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:00:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:53,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:00:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 20:00:53,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:00:53,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101468045] [2021-11-16 20:00:53,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101468045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:00:53,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:00:53,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 20:00:53,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861281374] [2021-11-16 20:00:53,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:00:53,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:00:53,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:00:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:00:53,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 20:00:53,142 INFO L87 Difference]: Start difference. First operand has 77 states, 47 states have (on average 1.297872340425532) internal successors, (61), 51 states have internal predecessors, (61), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 20:00:54,221 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:00:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:00:54,949 INFO L93 Difference]: Finished difference Result 156 states and 223 transitions. [2021-11-16 20:00:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:00:54,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 65 [2021-11-16 20:00:54,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:00:54,958 INFO L225 Difference]: With dead ends: 156 [2021-11-16 20:00:54,958 INFO L226 Difference]: Without dead ends: 77 [2021-11-16 20:00:54,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:00:54,966 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 76 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:00:54,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 120 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-16 20:00:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-16 20:00:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-11-16 20:00:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 46 states have internal predecessors, (53), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-16 20:00:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-11-16 20:00:55,051 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 65 [2021-11-16 20:00:55,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:00:55,052 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-11-16 20:00:55,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 20:00:55,053 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-11-16 20:00:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-16 20:00:55,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:00:55,057 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:00:55,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 20:00:55,058 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:00:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:00:55,058 INFO L85 PathProgramCache]: Analyzing trace with hash -566993231, now seen corresponding path program 1 times [2021-11-16 20:00:55,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:00:55,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186449835] [2021-11-16 20:00:55,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:00:55,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:00:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:55,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:00:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:55,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:00:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:55,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:00:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:55,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 20:00:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:55,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:00:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:55,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:00:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:55,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-16 20:00:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:55,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:00:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:55,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:00:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:55,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:00:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:55,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:00:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 20:00:55,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:00:55,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186449835] [2021-11-16 20:00:55,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186449835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:00:55,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:00:55,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 20:00:55,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852687402] [2021-11-16 20:00:55,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:00:55,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:00:55,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:00:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:00:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:00:55,456 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-16 20:00:56,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:00:56,075 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2021-11-16 20:00:56,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:00:56,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 4 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 65 [2021-11-16 20:00:56,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:00:56,079 INFO L225 Difference]: With dead ends: 97 [2021-11-16 20:00:56,079 INFO L226 Difference]: Without dead ends: 80 [2021-11-16 20:00:56,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:00:56,086 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 78 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:00:56,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 190 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 20:00:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-16 20:00:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-11-16 20:00:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 48 states have internal predecessors, (55), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) [2021-11-16 20:00:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2021-11-16 20:00:56,108 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 65 [2021-11-16 20:00:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:00:56,108 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2021-11-16 20:00:56,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-16 20:00:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2021-11-16 20:00:56,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-16 20:00:56,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:00:56,116 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:00:56,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-16 20:00:56,116 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:00:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:00:56,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1579169156, now seen corresponding path program 1 times [2021-11-16 20:00:56,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:00:56,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899744375] [2021-11-16 20:00:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:00:56,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:00:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:56,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:00:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:56,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:00:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:56,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:00:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:56,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 20:00:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:56,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:00:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:56,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:00:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:56,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-16 20:00:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:56,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:00:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:56,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:00:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:56,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:00:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:56,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:00:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-16 20:00:56,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:00:56,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899744375] [2021-11-16 20:00:56,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899744375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:00:56,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872162015] [2021-11-16 20:00:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:00:56,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:00:56,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:00:56,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:00:56,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 20:00:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:57,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 2446 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-16 20:00:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:00:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 20:00:57,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:00:57,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872162015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:00:57,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:00:57,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 18 [2021-11-16 20:00:57,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225199446] [2021-11-16 20:00:57,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:00:57,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:00:57,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:00:57,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:00:57,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:00:57,409 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 20:00:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:00:57,528 INFO L93 Difference]: Finished difference Result 109 states and 141 transitions. [2021-11-16 20:00:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:00:57,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-11-16 20:00:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:00:57,530 INFO L225 Difference]: With dead ends: 109 [2021-11-16 20:00:57,530 INFO L226 Difference]: Without dead ends: 93 [2021-11-16 20:00:57,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:00:57,531 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 9 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:00:57,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 543 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:00:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-16 20:00:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2021-11-16 20:00:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.196078431372549) internal successors, (61), 55 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 10 states have return successors, (27), 25 states have call predecessors, (27), 25 states have call successors, (27) [2021-11-16 20:00:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2021-11-16 20:00:57,551 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 67 [2021-11-16 20:00:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:00:57,552 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2021-11-16 20:00:57,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 20:00:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2021-11-16 20:00:57,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-16 20:00:57,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:00:57,553 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:00:57,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-16 20:00:57,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:00:57,754 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:00:57,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:00:57,754 INFO L85 PathProgramCache]: Analyzing trace with hash 537595811, now seen corresponding path program 1 times [2021-11-16 20:00:57,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:00:57,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373754397] [2021-11-16 20:00:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:00:57,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:00:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:57,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:00:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:57,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:00:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:57,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:00:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:57,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 20:00:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:58,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:00:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:58,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:00:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:58,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-16 20:00:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:58,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:00:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:58,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:00:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:58,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:00:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:58,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:00:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 20:00:58,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:00:58,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373754397] [2021-11-16 20:00:58,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373754397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:00:58,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:00:58,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:00:58,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391074774] [2021-11-16 20:00:58,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:00:58,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:00:58,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:00:58,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:00:58,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:00:58,069 INFO L87 Difference]: Start difference. First operand 88 states and 114 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 20:00:59,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:00:59,700 INFO L93 Difference]: Finished difference Result 140 states and 197 transitions. [2021-11-16 20:00:59,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:00:59,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 69 [2021-11-16 20:00:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:00:59,702 INFO L225 Difference]: With dead ends: 140 [2021-11-16 20:00:59,702 INFO L226 Difference]: Without dead ends: 126 [2021-11-16 20:00:59,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:00:59,703 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 90 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:00:59,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 409 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-16 20:00:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-16 20:00:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2021-11-16 20:00:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 73 states have internal predecessors, (80), 42 states have call successors, (42), 10 states have call predecessors, (42), 12 states have return successors, (48), 41 states have call predecessors, (48), 41 states have call successors, (48) [2021-11-16 20:00:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 170 transitions. [2021-11-16 20:00:59,729 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 170 transitions. Word has length 69 [2021-11-16 20:00:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:00:59,729 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 170 transitions. [2021-11-16 20:00:59,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 20:00:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 170 transitions. [2021-11-16 20:00:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-16 20:00:59,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:00:59,731 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 20:00:59,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-16 20:00:59,731 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:00:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:00:59,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1643615623, now seen corresponding path program 1 times [2021-11-16 20:00:59,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:00:59,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497898412] [2021-11-16 20:00:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:00:59,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:00:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:59,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:00:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:59,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:00:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:59,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:00:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:59,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 20:00:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:59,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:00:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:59,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:00:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:59,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-16 20:00:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:59,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:00:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:59,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:00:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:59,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:00:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:59,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:00:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:00:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 20:00:59,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:00:59,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497898412] [2021-11-16 20:00:59,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497898412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:00:59,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:00:59,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 20:00:59,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718624178] [2021-11-16 20:00:59,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:00:59,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:00:59,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:00:59,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:00:59,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:00:59,997 INFO L87 Difference]: Start difference. First operand 122 states and 170 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-16 20:01:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:01:00,887 INFO L93 Difference]: Finished difference Result 145 states and 201 transitions. [2021-11-16 20:01:00,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 20:01:00,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-11-16 20:01:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:01:00,889 INFO L225 Difference]: With dead ends: 145 [2021-11-16 20:01:00,889 INFO L226 Difference]: Without dead ends: 117 [2021-11-16 20:01:00,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-16 20:01:00,890 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 104 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:01:00,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 502 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-16 20:01:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-16 20:01:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2021-11-16 20:01:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 64 states have (on average 1.1875) internal successors, (76), 69 states have internal predecessors, (76), 36 states have call successors, (36), 10 states have call predecessors, (36), 12 states have return successors, (41), 36 states have call predecessors, (41), 35 states have call successors, (41) [2021-11-16 20:01:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 153 transitions. [2021-11-16 20:01:00,897 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 153 transitions. Word has length 70 [2021-11-16 20:01:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:01:00,897 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 153 transitions. [2021-11-16 20:01:00,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-16 20:01:00,898 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 153 transitions. [2021-11-16 20:01:00,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-16 20:01:00,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:01:00,899 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:01:00,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-16 20:01:00,899 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:01:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:01:00,900 INFO L85 PathProgramCache]: Analyzing trace with hash 510934331, now seen corresponding path program 1 times [2021-11-16 20:01:00,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:01:00,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426198521] [2021-11-16 20:01:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:00,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:01:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:01:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:01:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 20:01:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 20:01:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:01:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:01:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:01:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:01:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:01:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 20:01:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:01:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-16 20:01:01,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:01:01,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426198521] [2021-11-16 20:01:01,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426198521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:01:01,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024456792] [2021-11-16 20:01:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:01,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:01:01,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:01:01,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:01:01,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 20:01:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:01,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 2484 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-16 20:01:01,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:01:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-16 20:01:02,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:01:02,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024456792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:01:02,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:01:02,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [13] total 24 [2021-11-16 20:01:02,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371674200] [2021-11-16 20:01:02,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:01:02,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-16 20:01:02,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:01:02,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-16 20:01:02,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-11-16 20:01:02,414 INFO L87 Difference]: Start difference. First operand 113 states and 153 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-16 20:01:02,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:01:02,810 INFO L93 Difference]: Finished difference Result 174 states and 243 transitions. [2021-11-16 20:01:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 20:01:02,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 3 states have call successors, (13) Word has length 83 [2021-11-16 20:01:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:01:02,811 INFO L225 Difference]: With dead ends: 174 [2021-11-16 20:01:02,812 INFO L226 Difference]: Without dead ends: 139 [2021-11-16 20:01:02,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-11-16 20:01:02,813 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 38 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:01:02,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1337 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 20:01:02,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-16 20:01:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2021-11-16 20:01:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 77 states have internal predecessors, (83), 46 states have call successors, (46), 10 states have call predecessors, (46), 13 states have return successors, (54), 46 states have call predecessors, (54), 45 states have call successors, (54) [2021-11-16 20:01:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 183 transitions. [2021-11-16 20:01:02,826 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 183 transitions. Word has length 83 [2021-11-16 20:01:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:01:02,826 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 183 transitions. [2021-11-16 20:01:02,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-16 20:01:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 183 transitions. [2021-11-16 20:01:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-16 20:01:02,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:01:02,846 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:01:02,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 20:01:03,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-16 20:01:03,064 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:01:03,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:01:03,064 INFO L85 PathProgramCache]: Analyzing trace with hash -66334228, now seen corresponding path program 1 times [2021-11-16 20:01:03,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:01:03,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143449089] [2021-11-16 20:01:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:03,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:01:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:01:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:01:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 20:01:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 20:01:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:01:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:01:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:01:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:01:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:01:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:01:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:01:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:01:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-16 20:01:03,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:01:03,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143449089] [2021-11-16 20:01:03,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143449089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:01:03,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234303897] [2021-11-16 20:01:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:03,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:01:03,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:01:03,858 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:01:03,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 20:01:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:04,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 2515 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-16 20:01:04,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:01:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 3 proven. 52 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-16 20:01:04,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:01:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-16 20:01:05,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234303897] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 20:01:05,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:01:05,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [25, 20] total 47 [2021-11-16 20:01:05,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737084130] [2021-11-16 20:01:05,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:01:05,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:01:05,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:01:05,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:01:05,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2008, Unknown=0, NotChecked=0, Total=2162 [2021-11-16 20:01:05,445 INFO L87 Difference]: Start difference. First operand 131 states and 183 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 20:01:05,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:01:05,591 INFO L93 Difference]: Finished difference Result 151 states and 208 transitions. [2021-11-16 20:01:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:01:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 94 [2021-11-16 20:01:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:01:05,593 INFO L225 Difference]: With dead ends: 151 [2021-11-16 20:01:05,593 INFO L226 Difference]: Without dead ends: 149 [2021-11-16 20:01:05,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2021-11-16 20:01:05,594 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 28 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:01:05,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 664 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:01:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-16 20:01:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2021-11-16 20:01:05,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 83 states have internal predecessors, (90), 48 states have call successors, (48), 12 states have call predecessors, (48), 15 states have return successors, (56), 48 states have call predecessors, (56), 47 states have call successors, (56) [2021-11-16 20:01:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 194 transitions. [2021-11-16 20:01:05,627 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 194 transitions. Word has length 94 [2021-11-16 20:01:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:01:05,627 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 194 transitions. [2021-11-16 20:01:05,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 20:01:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 194 transitions. [2021-11-16 20:01:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-16 20:01:05,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:01:05,629 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:01:05,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-16 20:01:05,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:01:05,839 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:01:05,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:01:05,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1874232636, now seen corresponding path program 1 times [2021-11-16 20:01:05,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:01:05,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779889094] [2021-11-16 20:01:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:05,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:01:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:01:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:01:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:01:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 20:01:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-16 20:01:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:01:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:01:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:01:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:01:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:01:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-16 20:01:06,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:01:06,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779889094] [2021-11-16 20:01:06,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779889094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:01:06,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084815500] [2021-11-16 20:01:06,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:06,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:01:06,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:01:06,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:01:06,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 20:01:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:06,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 2493 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-16 20:01:06,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:01:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 20:01:07,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:01:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-16 20:01:07,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084815500] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 20:01:07,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:01:07,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [20, 14] total 42 [2021-11-16 20:01:07,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235120670] [2021-11-16 20:01:07,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:01:07,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 20:01:07,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:01:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 20:01:07,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1593, Unknown=0, NotChecked=0, Total=1722 [2021-11-16 20:01:07,886 INFO L87 Difference]: Start difference. First operand 141 states and 194 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:01:09,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:01:09,054 INFO L93 Difference]: Finished difference Result 176 states and 248 transitions. [2021-11-16 20:01:09,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 20:01:09,054 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 80 [2021-11-16 20:01:09,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:01:09,055 INFO L225 Difference]: With dead ends: 176 [2021-11-16 20:01:09,055 INFO L226 Difference]: Without dead ends: 161 [2021-11-16 20:01:09,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=198, Invalid=2454, Unknown=0, NotChecked=0, Total=2652 [2021-11-16 20:01:09,057 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 155 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:01:09,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 655 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-16 20:01:09,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-16 20:01:09,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2021-11-16 20:01:09,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 87 states have internal predecessors, (94), 52 states have call successors, (52), 12 states have call predecessors, (52), 16 states have return successors, (72), 54 states have call predecessors, (72), 51 states have call successors, (72) [2021-11-16 20:01:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 218 transitions. [2021-11-16 20:01:09,064 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 218 transitions. Word has length 80 [2021-11-16 20:01:09,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:01:09,064 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 218 transitions. [2021-11-16 20:01:09,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:01:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 218 transitions. [2021-11-16 20:01:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-16 20:01:09,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:01:09,066 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:01:09,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-16 20:01:09,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:01:09,266 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:01:09,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:01:09,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1854673709, now seen corresponding path program 1 times [2021-11-16 20:01:09,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:01:09,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419242437] [2021-11-16 20:01:09,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:09,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:01:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:01:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:01:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:01:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 20:01:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-16 20:01:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:01:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:01:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 20:01:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:01:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:01:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:01:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-16 20:01:09,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:01:09,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419242437] [2021-11-16 20:01:09,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419242437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:01:09,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221951274] [2021-11-16 20:01:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:09,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:01:09,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:01:09,761 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:01:09,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 20:01:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:10,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 2514 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-16 20:01:10,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:01:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-16 20:01:10,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:01:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-16 20:01:11,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221951274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:01:11,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:01:11,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 13] total 40 [2021-11-16 20:01:11,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690895438] [2021-11-16 20:01:11,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:01:11,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-16 20:01:11,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:01:11,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-16 20:01:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1440, Unknown=0, NotChecked=0, Total=1560 [2021-11-16 20:01:11,087 INFO L87 Difference]: Start difference. First operand 150 states and 218 transitions. Second operand has 40 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 30 states have internal predecessors, (81), 14 states have call successors, (33), 6 states have call predecessors, (33), 11 states have return successors, (30), 15 states have call predecessors, (30), 12 states have call successors, (30) [2021-11-16 20:01:16,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:01:16,926 INFO L93 Difference]: Finished difference Result 201 states and 299 transitions. [2021-11-16 20:01:16,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-16 20:01:16,927 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 30 states have internal predecessors, (81), 14 states have call successors, (33), 6 states have call predecessors, (33), 11 states have return successors, (30), 15 states have call predecessors, (30), 12 states have call successors, (30) Word has length 87 [2021-11-16 20:01:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:01:16,928 INFO L225 Difference]: With dead ends: 201 [2021-11-16 20:01:16,928 INFO L226 Difference]: Without dead ends: 186 [2021-11-16 20:01:16,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=283, Invalid=2909, Unknown=0, NotChecked=0, Total=3192 [2021-11-16 20:01:16,930 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 229 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:01:16,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 618 Invalid, 2660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-16 20:01:16,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-16 20:01:16,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 164. [2021-11-16 20:01:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 91 states have internal predecessors, (99), 62 states have call successors, (62), 12 states have call predecessors, (62), 16 states have return successors, (87), 64 states have call predecessors, (87), 61 states have call successors, (87) [2021-11-16 20:01:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 248 transitions. [2021-11-16 20:01:16,950 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 248 transitions. Word has length 87 [2021-11-16 20:01:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:01:16,950 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 248 transitions. [2021-11-16 20:01:16,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 30 states have internal predecessors, (81), 14 states have call successors, (33), 6 states have call predecessors, (33), 11 states have return successors, (30), 15 states have call predecessors, (30), 12 states have call successors, (30) [2021-11-16 20:01:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 248 transitions. [2021-11-16 20:01:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-16 20:01:16,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:01:16,955 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:01:16,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-16 20:01:17,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:01:17,179 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:01:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:01:17,179 INFO L85 PathProgramCache]: Analyzing trace with hash -108622202, now seen corresponding path program 1 times [2021-11-16 20:01:17,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:01:17,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762320675] [2021-11-16 20:01:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:17,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:01:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:01:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:01:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:01:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 20:01:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-16 20:01:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:01:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:01:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:01:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:01:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:01:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-16 20:01:17,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:01:17,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762320675] [2021-11-16 20:01:17,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762320675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:01:17,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:01:17,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 20:01:17,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086461224] [2021-11-16 20:01:17,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:01:17,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:01:17,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:01:17,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:01:17,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:01:17,352 INFO L87 Difference]: Start difference. First operand 164 states and 248 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:01:17,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:01:17,931 INFO L93 Difference]: Finished difference Result 185 states and 271 transitions. [2021-11-16 20:01:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:01:17,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 81 [2021-11-16 20:01:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:01:17,932 INFO L225 Difference]: With dead ends: 185 [2021-11-16 20:01:17,932 INFO L226 Difference]: Without dead ends: 162 [2021-11-16 20:01:17,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:01:17,933 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 80 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:01:17,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 182 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 20:01:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-16 20:01:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2021-11-16 20:01:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 90 states have internal predecessors, (99), 57 states have call successors, (57), 12 states have call predecessors, (57), 16 states have return successors, (77), 61 states have call predecessors, (77), 56 states have call successors, (77) [2021-11-16 20:01:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 233 transitions. [2021-11-16 20:01:17,952 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 233 transitions. Word has length 81 [2021-11-16 20:01:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:01:17,952 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 233 transitions. [2021-11-16 20:01:17,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:01:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 233 transitions. [2021-11-16 20:01:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-16 20:01:17,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:01:17,954 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:01:17,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-16 20:01:17,954 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:01:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:01:17,955 INFO L85 PathProgramCache]: Analyzing trace with hash -727359888, now seen corresponding path program 1 times [2021-11-16 20:01:17,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:01:17,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289316992] [2021-11-16 20:01:17,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:17,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:01:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:01:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:01:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 20:01:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 20:01:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:01:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:01:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:01:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:01:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:01:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 20:01:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:01:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-16 20:01:18,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:01:18,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289316992] [2021-11-16 20:01:18,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289316992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:01:18,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:01:18,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:01:18,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881295115] [2021-11-16 20:01:18,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:01:18,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:01:18,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:01:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:01:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:01:18,178 INFO L87 Difference]: Start difference. First operand 159 states and 233 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:01:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:01:19,783 INFO L93 Difference]: Finished difference Result 183 states and 260 transitions. [2021-11-16 20:01:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:01:19,784 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 86 [2021-11-16 20:01:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:01:19,785 INFO L225 Difference]: With dead ends: 183 [2021-11-16 20:01:19,785 INFO L226 Difference]: Without dead ends: 149 [2021-11-16 20:01:19,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:01:19,785 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 80 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:01:19,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 503 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-16 20:01:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-16 20:01:19,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-16 20:01:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 88 states have internal predecessors, (97), 49 states have call successors, (49), 12 states have call predecessors, (49), 16 states have return successors, (63), 53 states have call predecessors, (63), 47 states have call successors, (63) [2021-11-16 20:01:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 209 transitions. [2021-11-16 20:01:19,803 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 209 transitions. Word has length 86 [2021-11-16 20:01:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:01:19,803 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 209 transitions. [2021-11-16 20:01:19,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:01:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 209 transitions. [2021-11-16 20:01:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-16 20:01:19,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:01:19,806 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:01:19,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-16 20:01:19,806 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:01:19,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:01:19,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1085947873, now seen corresponding path program 1 times [2021-11-16 20:01:19,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:01:19,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974267253] [2021-11-16 20:01:19,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:19,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:01:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:19,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:01:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:19,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:01:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 20:01:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 20:01:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:01:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:01:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:01:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:01:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:01:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:01:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:01:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:01:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:01:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-16 20:01:20,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:01:20,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974267253] [2021-11-16 20:01:20,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974267253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:01:20,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679939660] [2021-11-16 20:01:20,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:20,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:01:20,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:01:20,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:01:20,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 20:01:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:20,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 2532 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-16 20:01:20,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:01:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 3 proven. 52 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-16 20:01:20,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:01:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-16 20:01:21,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679939660] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 20:01:21,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:01:21,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17, 13] total 36 [2021-11-16 20:01:21,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707457205] [2021-11-16 20:01:21,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:01:21,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 20:01:21,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:01:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 20:01:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2021-11-16 20:01:21,555 INFO L87 Difference]: Start difference. First operand 149 states and 209 transitions. Second operand has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 20:01:23,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:01:23,524 INFO L93 Difference]: Finished difference Result 189 states and 275 transitions. [2021-11-16 20:01:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 20:01:23,525 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2021-11-16 20:01:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:01:23,526 INFO L225 Difference]: With dead ends: 189 [2021-11-16 20:01:23,526 INFO L226 Difference]: Without dead ends: 160 [2021-11-16 20:01:23,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2021-11-16 20:01:23,527 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 106 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:01:23,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 732 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-16 20:01:23,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-16 20:01:23,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2021-11-16 20:01:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 89 states have internal predecessors, (99), 53 states have call successors, (53), 12 states have call predecessors, (53), 16 states have return successors, (67), 58 states have call predecessors, (67), 51 states have call successors, (67) [2021-11-16 20:01:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 219 transitions. [2021-11-16 20:01:23,540 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 219 transitions. Word has length 97 [2021-11-16 20:01:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:01:23,541 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 219 transitions. [2021-11-16 20:01:23,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 20:01:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 219 transitions. [2021-11-16 20:01:23,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-16 20:01:23,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:01:23,542 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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, 1, 1, 1, 1] [2021-11-16 20:01:23,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-16 20:01:23,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:01:23,762 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:01:23,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:01:23,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1647697566, now seen corresponding path program 1 times [2021-11-16 20:01:23,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:01:23,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15968357] [2021-11-16 20:01:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:01:23,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:01:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:01:52,263 WARN L227 SmtUtils]: Spent 10.85s on a formula simplification. DAG size of input: 170 DAG size of output: 170 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:02:41,109 WARN L227 SmtUtils]: Spent 15.03s on a formula simplification. DAG size of input: 172 DAG size of output: 172 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:03:00,043 WARN L227 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 173 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:03:00,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:03:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:00,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:03:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:00,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:03:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:00,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 20:03:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:00,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 20:03:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:00,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:03:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:00,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:03:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:00,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:03:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:01,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:03:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:01,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:03:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:01,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:03:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:13,774 WARN L227 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 190 DAG size of output: 184 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:03:13,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:03:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:13,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:03:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:13,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 20:03:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:13,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:03:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:13,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:03:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:13,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:03:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-16 20:03:13,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:03:13,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15968357] [2021-11-16 20:03:13,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15968357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:03:13,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605612701] [2021-11-16 20:03:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:03:13,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:03:13,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:03:13,874 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:03:13,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 20:03:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:03:14,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2553 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-16 20:03:14,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:03:15,268 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 [2021-11-16 20:03:15,652 INFO L354 Elim1Store]: treesize reduction 164, result has 27.8 percent of original size [2021-11-16 20:03:15,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 84 treesize of output 122 [2021-11-16 20:03:15,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:03:15,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:03:15,701 INFO L354 Elim1Store]: treesize reduction 65, result has 25.3 percent of original size [2021-11-16 20:03:15,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 120 treesize of output 101 [2021-11-16 20:03:15,801 INFO L354 Elim1Store]: treesize reduction 57, result has 19.7 percent of original size [2021-11-16 20:03:15,801 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 119 [2021-11-16 20:03:39,816 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-16 20:03:39,817 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 65 [2021-11-16 20:03:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-16 20:03:39,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:03:51,671 INFO L354 Elim1Store]: treesize reduction 834, result has 0.1 percent of original size [2021-11-16 20:03:51,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 405 treesize of output 1 [2021-11-16 20:04:10,968 WARN L227 SmtUtils]: Spent 10.12s on a formula simplification that was a NOOP. DAG size: 139 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:04:22,892 WARN L227 SmtUtils]: Spent 10.10s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:04:35,236 WARN L227 SmtUtils]: Spent 12.19s on a formula simplification. DAG size of input: 302 DAG size of output: 230 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-16 20:04:35,237 INFO L354 Elim1Store]: treesize reduction 214, result has 75.0 percent of original size [2021-11-16 20:04:35,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 149339 treesize of output 107044 [2021-11-16 20:04:36,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-16 20:04:36,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:04:36,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-16 20:04:36,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986311965] [2021-11-16 20:04:36,402 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 20:04:36,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-16 20:04:36,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:04:36,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-16 20:04:36,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2781, Unknown=14, NotChecked=0, Total=2970 [2021-11-16 20:04:36,404 INFO L87 Difference]: Start difference. First operand 154 states and 219 transitions. Second operand has 24 states, 20 states have (on average 2.25) internal successors, (45), 16 states have internal predecessors, (45), 7 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-16 20:04:38,190 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:04:39,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:04:41,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:04:44,102 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:04:53,413 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 219 DAG size of output: 206 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:05:07,551 WARN L227 SmtUtils]: Spent 6.96s on a formula simplification that was a NOOP. DAG size: 181 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:05:19,573 WARN L227 SmtUtils]: Spent 5.67s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:05:39,951 WARN L227 SmtUtils]: Spent 14.85s on a formula simplification that was a NOOP. DAG size: 330 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:06:10,733 WARN L227 SmtUtils]: Spent 20.94s on a formula simplification that was a NOOP. DAG size: 333 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:06:12,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:06:12,926 INFO L93 Difference]: Finished difference Result 172 states and 238 transitions. [2021-11-16 20:06:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-16 20:06:12,926 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.25) internal successors, (45), 16 states have internal predecessors, (45), 7 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-11-16 20:06:12,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:06:12,927 INFO L225 Difference]: With dead ends: 172 [2021-11-16 20:06:12,927 INFO L226 Difference]: Without dead ends: 127 [2021-11-16 20:06:12,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 148 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 184.1s TimeCoverageRelationStatistics Valid=292, Invalid=4938, Unknown=26, NotChecked=0, Total=5256 [2021-11-16 20:06:12,929 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 116 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 2145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:06:12,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 939 Invalid, 2145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2021-11-16 20:06:12,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-16 20:06:12,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2021-11-16 20:06:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 72 states have internal predecessors, (76), 34 states have call successors, (34), 11 states have call predecessors, (34), 15 states have return successors, (39), 34 states have call predecessors, (39), 32 states have call successors, (39) [2021-11-16 20:06:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 149 transitions. [2021-11-16 20:06:12,936 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 149 transitions. Word has length 104 [2021-11-16 20:06:12,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:06:12,937 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 149 transitions. [2021-11-16 20:06:12,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.25) internal successors, (45), 16 states have internal predecessors, (45), 7 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-16 20:06:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 149 transitions. [2021-11-16 20:06:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-16 20:06:12,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:06:12,940 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:06:12,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-16 20:06:13,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:06:13,160 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:06:13,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:06:13,160 INFO L85 PathProgramCache]: Analyzing trace with hash 540771710, now seen corresponding path program 1 times [2021-11-16 20:06:13,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:06:13,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103539124] [2021-11-16 20:06:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:06:13,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:06:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:06:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:06:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:06:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:06:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:06:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 20:06:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-16 20:06:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:06:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:06:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:06:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:06:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:06:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 20:06:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:06:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:06:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:06:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-16 20:06:13,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:06:13,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103539124] [2021-11-16 20:06:13,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103539124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:06:13,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:06:13,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 20:06:13,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700580266] [2021-11-16 20:06:13,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:06:13,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:06:13,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:06:13,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:06:13,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:06:13,495 INFO L87 Difference]: Start difference. First operand 116 states and 149 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-16 20:06:14,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:06:14,245 INFO L93 Difference]: Finished difference Result 133 states and 167 transitions. [2021-11-16 20:06:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:06:14,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 94 [2021-11-16 20:06:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:06:14,246 INFO L225 Difference]: With dead ends: 133 [2021-11-16 20:06:14,246 INFO L226 Difference]: Without dead ends: 114 [2021-11-16 20:06:14,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:06:14,247 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 92 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:06:14,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 226 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-16 20:06:14,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-16 20:06:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-16 20:06:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 70 states have internal predecessors, (74), 34 states have call successors, (34), 11 states have call predecessors, (34), 14 states have return successors, (38), 34 states have call predecessors, (38), 32 states have call successors, (38) [2021-11-16 20:06:14,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 146 transitions. [2021-11-16 20:06:14,256 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 146 transitions. Word has length 94 [2021-11-16 20:06:14,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:06:14,256 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 146 transitions. [2021-11-16 20:06:14,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-16 20:06:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 146 transitions. [2021-11-16 20:06:14,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-16 20:06:14,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:06:14,260 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:06:14,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-16 20:06:14,260 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:06:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:06:14,261 INFO L85 PathProgramCache]: Analyzing trace with hash -489801862, now seen corresponding path program 1 times [2021-11-16 20:06:14,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:06:14,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549060477] [2021-11-16 20:06:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:06:14,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:06:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:07:36,106 WARN L227 SmtUtils]: Spent 39.73s on a formula simplification. DAG size of input: 195 DAG size of output: 184 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:08:53,214 WARN L227 SmtUtils]: Spent 42.18s on a formula simplification. DAG size of input: 188 DAG size of output: 183 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:09:58,376 WARN L227 SmtUtils]: Spent 34.58s on a formula simplification. DAG size of input: 184 DAG size of output: 178 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:10:33,395 WARN L227 SmtUtils]: Spent 8.38s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:11:16,951 WARN L227 SmtUtils]: Spent 13.55s on a formula simplification. DAG size of input: 172 DAG size of output: 166 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:12:09,512 WARN L227 SmtUtils]: Spent 13.60s on a formula simplification that was a NOOP. DAG size: 173 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:12:09,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:12:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:12:09,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:12:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:12:10,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:12:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:12:10,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:12:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:12:10,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:12:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:12:10,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 20:12:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:12:10,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-16 20:12:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:13:00,306 WARN L227 SmtUtils]: Spent 9.37s on a formula simplification that was a NOOP. DAG size: 184 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:13:00,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:13:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:13:00,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:13:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:13:00,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:13:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:13:00,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:13:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:13:00,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:13:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:13:00,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 20:13:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:13:00,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:13:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:13:00,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:13:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:13:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-16 20:13:00,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:13:00,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549060477] [2021-11-16 20:13:00,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549060477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:13:00,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620897087] [2021-11-16 20:13:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:13:00,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:13:00,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:13:00,962 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:13:00,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 20:13:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:13:01,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 2556 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-16 20:13:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:13:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-16 20:13:03,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:13:03,650 INFO L354 Elim1Store]: treesize reduction 9, result has 85.9 percent of original size [2021-11-16 20:13:03,651 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 78 [2021-11-16 20:13:05,055 INFO L354 Elim1Store]: treesize reduction 90, result has 68.6 percent of original size [2021-11-16 20:13:05,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 100 treesize of output 246 Killed by 15