./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_byte_buf_write_be16_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 e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:59:08,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:59:08,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:59:08,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:59:08,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:59:08,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:59:08,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:59:08,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:59:08,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:59:08,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:59:08,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:59:08,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:59:08,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:59:08,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:59:08,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:59:08,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:59:08,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:59:08,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:59:08,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:59:08,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:59:08,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:59:08,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:59:08,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:59:08,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:59:08,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:59:08,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:59:08,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:59:08,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:59:08,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:59:08,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:59:08,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:59:08,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:59:08,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:59:08,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:59:08,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:59:08,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:59:08,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:59:08,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:59:08,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:59:08,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:59:08,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:59:08,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-17 23:59:08,512 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:59:08,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:59:08,512 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:59:08,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:59:08,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:59:08,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:59:08,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:59:08,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:59:08,514 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:59:08,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:59:08,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:59:08,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:59:08,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:59:08,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:59:08,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:59:08,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:59:08,516 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:59:08,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:59:08,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:59:08,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:59:08,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:59:08,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:59:08,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:59:08,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:59:08,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:59:08,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:59:08,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:59:08,518 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:59:08,518 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:59:08,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:59:08,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:59:08,519 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 [2021-12-17 23:59:08,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:59:08,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:59:08,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:59:08,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:59:08,739 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:59:08,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-12-17 23:59:08,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8db4281/1e3c9c04bf084cd0b675643795aef703/FLAG5af270d43 [2021-12-17 23:59:09,450 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:59:09,451 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-12-17 23:59:09,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8db4281/1e3c9c04bf084cd0b675643795aef703/FLAG5af270d43 [2021-12-17 23:59:09,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8db4281/1e3c9c04bf084cd0b675643795aef703 [2021-12-17 23:59:09,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:59:09,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:59:09,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:59:09,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:59:09,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:59:09,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:59:09" (1/1) ... [2021-12-17 23:59:09,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20213702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:09, skipping insertion in model container [2021-12-17 23:59:09,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:59:09" (1/1) ... [2021-12-17 23:59:09,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:59:09,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:59:09,963 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_byte_buf_write_be16_harness.i[4497,4510] [2021-12-17 23:59:09,971 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_byte_buf_write_be16_harness.i[4557,4570] [2021-12-17 23:59:10,631 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:10,631 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:10,632 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:10,632 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:10,633 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:10,643 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:10,646 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:10,649 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:10,650 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:10,885 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-17 23:59:10,886 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-17 23:59:10,886 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-17 23:59:10,887 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-17 23:59:10,888 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-17 23:59:10,889 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-17 23:59:10,889 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-17 23:59:10,890 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-17 23:59:10,890 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-17 23:59:10,891 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-17 23:59:10,997 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-17 23:59:11,108 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,115 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:59:11,238 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:59:11,253 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_byte_buf_write_be16_harness.i[4497,4510] [2021-12-17 23:59:11,256 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_byte_buf_write_be16_harness.i[4557,4570] [2021-12-17 23:59:11,279 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,279 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,279 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,280 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,280 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,284 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,284 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,285 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,285 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,306 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-17 23:59:11,307 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-17 23:59:11,307 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-17 23:59:11,308 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-17 23:59:11,308 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-17 23:59:11,309 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-17 23:59:11,309 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-17 23:59:11,310 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-17 23:59:11,310 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-17 23:59:11,310 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-17 23:59:11,328 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-17 23:59:11,378 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,380 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:59:11,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:59:11,572 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:59:11,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:11 WrapperNode [2021-12-17 23:59:11,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:59:11,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:59:11,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:59:11,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:59:11,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:11" (1/1) ... [2021-12-17 23:59:11,666 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:11" (1/1) ... [2021-12-17 23:59:11,778 INFO L137 Inliner]: procedures = 691, calls = 2619, calls flagged for inlining = 62, calls inlined = 10, statements flattened = 866 [2021-12-17 23:59:11,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:59:11,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:59:11,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:59:11,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:59:11,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:11" (1/1) ... [2021-12-17 23:59:11,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:11" (1/1) ... [2021-12-17 23:59:11,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:11" (1/1) ... [2021-12-17 23:59:11,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:11" (1/1) ... [2021-12-17 23:59:11,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:11" (1/1) ... [2021-12-17 23:59:11,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:11" (1/1) ... [2021-12-17 23:59:11,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:11" (1/1) ... [2021-12-17 23:59:11,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:59:11,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:59:11,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:59:11,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:59:11,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:11" (1/1) ... [2021-12-17 23:59:11,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:59:11,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:11,904 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) [2021-12-17 23:59:11,926 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 [2021-12-17 23:59:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure htons [2021-12-17 23:59:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-17 23:59:11,946 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-17 23:59:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:59:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-17 23:59:11,947 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-17 23:59:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:59:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 23:59:11,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 23:59:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 23:59:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:59:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 23:59:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-17 23:59:11,950 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-17 23:59:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:59:11,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:59:11,951 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-17 23:59:11,951 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-17 23:59:11,951 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-17 23:59:11,951 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-17 23:59:11,951 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 23:59:11,952 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 23:59:11,952 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-17 23:59:11,952 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-17 23:59:11,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:59:11,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 23:59:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-12-17 23:59:11,953 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-12-17 23:59:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-17 23:59:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-17 23:59:11,954 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-17 23:59:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:59:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:59:12,258 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:59:12,260 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:59:12,890 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:59:12,897 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:59:12,898 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 23:59:12,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:59:12 BoogieIcfgContainer [2021-12-17 23:59:12,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:59:12,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:59:12,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:59:12,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:59:12,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:59:09" (1/3) ... [2021-12-17 23:59:12,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2eaee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:59:12, skipping insertion in model container [2021-12-17 23:59:12,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:59:11" (2/3) ... [2021-12-17 23:59:12,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2eaee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:59:12, skipping insertion in model container [2021-12-17 23:59:12,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:59:12" (3/3) ... [2021-12-17 23:59:12,908 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_be16_harness.i [2021-12-17 23:59:12,912 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:59:12,913 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:59:12,957 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:59:12,962 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 23:59:12,962 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 23:59:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-17 23:59:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 23:59:12,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:12,996 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:12,997 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash 239952465, now seen corresponding path program 1 times [2021-12-17 23:59:13,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:13,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890882298] [2021-12-17 23:59:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:13,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:59:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 23:59:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 23:59:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 23:59:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 23:59:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:59:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 23:59:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-17 23:59:13,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:13,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890882298] [2021-12-17 23:59:13,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890882298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:13,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:59:13,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 23:59:13,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776336158] [2021-12-17 23:59:13,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:13,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 23:59:13,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 23:59:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 23:59:13,730 INFO L87 Difference]: Start difference. First operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:59:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:14,009 INFO L93 Difference]: Finished difference Result 260 states and 369 transitions. [2021-12-17 23:59:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 23:59:14,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-12-17 23:59:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:14,019 INFO L225 Difference]: With dead ends: 260 [2021-12-17 23:59:14,019 INFO L226 Difference]: Without dead ends: 127 [2021-12-17 23:59:14,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 23:59:14,025 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 62 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:14,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 191 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 23:59:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-17 23:59:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-17 23:59:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 83 states have internal predecessors, (99), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-17 23:59:14,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2021-12-17 23:59:14,066 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 86 [2021-12-17 23:59:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:14,066 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2021-12-17 23:59:14,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:59:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2021-12-17 23:59:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 23:59:14,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:14,070 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:14,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:59:14,071 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash 89659733, now seen corresponding path program 1 times [2021-12-17 23:59:14,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:14,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469076705] [2021-12-17 23:59:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:14,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:59:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 23:59:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 23:59:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 23:59:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 23:59:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:59:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 23:59:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-17 23:59:14,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:14,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469076705] [2021-12-17 23:59:14,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469076705] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:14,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090666392] [2021-12-17 23:59:14,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:14,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:14,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:14,423 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) [2021-12-17 23:59:14,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:59:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:14,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 2620 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 23:59:14,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 23:59:15,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:15,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090666392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:15,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:15,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-17 23:59:15,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466285224] [2021-12-17 23:59:15,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:15,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:59:15,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:15,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:59:15,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 23:59:15,242 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 23:59:15,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:15,397 INFO L93 Difference]: Finished difference Result 232 states and 311 transitions. [2021-12-17 23:59:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:59:15,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 86 [2021-12-17 23:59:15,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:15,401 INFO L225 Difference]: With dead ends: 232 [2021-12-17 23:59:15,401 INFO L226 Difference]: Without dead ends: 130 [2021-12-17 23:59:15,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-17 23:59:15,403 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 195 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:15,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 473 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:59:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-17 23:59:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-17 23:59:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-12-17 23:59:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 172 transitions. [2021-12-17 23:59:15,418 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 172 transitions. Word has length 86 [2021-12-17 23:59:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:15,419 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 172 transitions. [2021-12-17 23:59:15,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 23:59:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 172 transitions. [2021-12-17 23:59:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 23:59:15,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:15,422 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:15,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:15,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:15,636 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:15,636 INFO L85 PathProgramCache]: Analyzing trace with hash -171255798, now seen corresponding path program 1 times [2021-12-17 23:59:15,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:15,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594325902] [2021-12-17 23:59:15,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:15,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:15,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:15,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:15,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:15,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:15,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:15,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:59:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:15,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 23:59:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:15,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:15,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 23:59:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:16,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:59:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:16,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 23:59:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:16,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 23:59:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-17 23:59:16,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:16,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594325902] [2021-12-17 23:59:16,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594325902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:16,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053488] [2021-12-17 23:59:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:16,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:16,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:16,042 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) [2021-12-17 23:59:16,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:59:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:16,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 23:59:16,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 23:59:16,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:16,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:16,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:16,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-17 23:59:16,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148903278] [2021-12-17 23:59:16,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:16,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 23:59:16,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 23:59:16,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-17 23:59:16,784 INFO L87 Difference]: Start difference. First operand 130 states and 172 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 23:59:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:17,023 INFO L93 Difference]: Finished difference Result 227 states and 302 transitions. [2021-12-17 23:59:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:59:17,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2021-12-17 23:59:17,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:17,025 INFO L225 Difference]: With dead ends: 227 [2021-12-17 23:59:17,025 INFO L226 Difference]: Without dead ends: 130 [2021-12-17 23:59:17,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:59:17,027 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 212 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:17,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 591 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 23:59:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-17 23:59:17,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-17 23:59:17,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-17 23:59:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 171 transitions. [2021-12-17 23:59:17,038 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 171 transitions. Word has length 92 [2021-12-17 23:59:17,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:17,038 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 171 transitions. [2021-12-17 23:59:17,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 23:59:17,038 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 171 transitions. [2021-12-17 23:59:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 23:59:17,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:17,040 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:17,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:17,255 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,SelfDestructingSolverStorable2 [2021-12-17 23:59:17,256 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:17,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:17,256 INFO L85 PathProgramCache]: Analyzing trace with hash -358018689, now seen corresponding path program 2 times [2021-12-17 23:59:17,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:17,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458181016] [2021-12-17 23:59:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:17,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:59:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 23:59:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:59:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:59:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 23:59:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 23:59:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 23:59:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 23:59:17,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:17,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458181016] [2021-12-17 23:59:17,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458181016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:17,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687956958] [2021-12-17 23:59:17,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:59:17,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:17,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:17,564 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) [2021-12-17 23:59:17,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:59:18,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:59:18,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:59:18,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 2654 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 23:59:18,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 23:59:18,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:18,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687956958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:18,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:18,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-12-17 23:59:18,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383788] [2021-12-17 23:59:18,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:18,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:59:18,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:18,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:59:18,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:59:18,571 INFO L87 Difference]: Start difference. First operand 130 states and 171 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 23:59:18,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:18,827 INFO L93 Difference]: Finished difference Result 221 states and 292 transitions. [2021-12-17 23:59:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:59:18,828 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 98 [2021-12-17 23:59:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:18,829 INFO L225 Difference]: With dead ends: 221 [2021-12-17 23:59:18,829 INFO L226 Difference]: Without dead ends: 127 [2021-12-17 23:59:18,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:59:18,830 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 218 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:18,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 675 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 23:59:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-17 23:59:18,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-17 23:59:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 83 states have internal predecessors, (98), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-17 23:59:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2021-12-17 23:59:18,850 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 98 [2021-12-17 23:59:18,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:18,852 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2021-12-17 23:59:18,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 23:59:18,853 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2021-12-17 23:59:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 23:59:18,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:18,861 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:18,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:19,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:19,075 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:19,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:19,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1323939499, now seen corresponding path program 1 times [2021-12-17 23:59:19,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:19,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279924247] [2021-12-17 23:59:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:19,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:59:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 23:59:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:59:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:59:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 23:59:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 23:59:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 23:59:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-17 23:59:19,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:19,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279924247] [2021-12-17 23:59:19,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279924247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:19,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:59:19,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 23:59:19,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956267156] [2021-12-17 23:59:19,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:19,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:59:19,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:19,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:59:19,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 23:59:19,441 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-17 23:59:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:19,927 INFO L93 Difference]: Finished difference Result 139 states and 182 transitions. [2021-12-17 23:59:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:59:19,927 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 110 [2021-12-17 23:59:19,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:19,929 INFO L225 Difference]: With dead ends: 139 [2021-12-17 23:59:19,929 INFO L226 Difference]: Without dead ends: 137 [2021-12-17 23:59:19,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-17 23:59:19,930 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 88 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:19,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 707 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 23:59:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-17 23:59:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-12-17 23:59:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 90 states have internal predecessors, (104), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-17 23:59:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2021-12-17 23:59:19,944 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 110 [2021-12-17 23:59:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:19,944 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2021-12-17 23:59:19,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-17 23:59:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2021-12-17 23:59:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 23:59:19,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:19,946 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:19,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 23:59:19,947 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:19,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2136545501, now seen corresponding path program 1 times [2021-12-17 23:59:19,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:19,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033193612] [2021-12-17 23:59:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:19,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:59:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 23:59:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:59:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:59:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 23:59:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 23:59:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 23:59:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-17 23:59:20,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:20,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033193612] [2021-12-17 23:59:20,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033193612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:20,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099279198] [2021-12-17 23:59:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:20,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:20,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:20,392 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) [2021-12-17 23:59:20,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 23:59:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:20,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 2700 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 23:59:20,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-17 23:59:25,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:25,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099279198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:25,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:25,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2021-12-17 23:59:25,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798048681] [2021-12-17 23:59:25,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:25,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:59:25,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:25,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:59:25,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=126, Unknown=2, NotChecked=0, Total=156 [2021-12-17 23:59:25,128 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-17 23:59:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:25,278 INFO L93 Difference]: Finished difference Result 263 states and 361 transitions. [2021-12-17 23:59:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:59:25,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 114 [2021-12-17 23:59:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:25,280 INFO L225 Difference]: With dead ends: 263 [2021-12-17 23:59:25,280 INFO L226 Difference]: Without dead ends: 152 [2021-12-17 23:59:25,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=34, Invalid=146, Unknown=2, NotChecked=0, Total=182 [2021-12-17 23:59:25,282 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 23 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:25,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 565 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2021-12-17 23:59:25,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-17 23:59:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 141. [2021-12-17 23:59:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 95 states have internal predecessors, (111), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-17 23:59:25,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 186 transitions. [2021-12-17 23:59:25,292 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 186 transitions. Word has length 114 [2021-12-17 23:59:25,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:25,292 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 186 transitions. [2021-12-17 23:59:25,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-17 23:59:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 186 transitions. [2021-12-17 23:59:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 23:59:25,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:25,294 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:25,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:25,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:25,505 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:25,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1900256357, now seen corresponding path program 1 times [2021-12-17 23:59:25,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:25,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046699036] [2021-12-17 23:59:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:25,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:59:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 23:59:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:59:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:59:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 23:59:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 23:59:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 23:59:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-17 23:59:25,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:25,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046699036] [2021-12-17 23:59:25,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046699036] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:25,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417149123] [2021-12-17 23:59:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:25,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:25,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:25,938 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) [2021-12-17 23:59:25,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 23:59:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:26,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 2695 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 23:59:26,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:26,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:59:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-17 23:59:26,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:26,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417149123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:26,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:26,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 21 [2021-12-17 23:59:26,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678005993] [2021-12-17 23:59:26,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:26,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 23:59:26,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:26,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 23:59:26,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:59:26,945 INFO L87 Difference]: Start difference. First operand 141 states and 186 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-17 23:59:26,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:26,999 INFO L93 Difference]: Finished difference Result 280 states and 371 transitions. [2021-12-17 23:59:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 23:59:27,000 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 114 [2021-12-17 23:59:27,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:27,001 INFO L225 Difference]: With dead ends: 280 [2021-12-17 23:59:27,001 INFO L226 Difference]: Without dead ends: 160 [2021-12-17 23:59:27,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:59:27,002 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 32 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:27,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 895 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2021-12-17 23:59:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-17 23:59:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-12-17 23:59:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 113 states have internal predecessors, (134), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-17 23:59:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 209 transitions. [2021-12-17 23:59:27,012 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 209 transitions. Word has length 114 [2021-12-17 23:59:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:27,013 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 209 transitions. [2021-12-17 23:59:27,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-17 23:59:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 209 transitions. [2021-12-17 23:59:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 23:59:27,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:27,015 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:27,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:27,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:27,231 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:27,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:27,232 INFO L85 PathProgramCache]: Analyzing trace with hash -333498407, now seen corresponding path program 1 times [2021-12-17 23:59:27,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:27,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967084346] [2021-12-17 23:59:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:27,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:59:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 23:59:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:59:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:59:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 23:59:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 23:59:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 23:59:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-17 23:59:27,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:27,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967084346] [2021-12-17 23:59:27,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967084346] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:27,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352501039] [2021-12-17 23:59:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:27,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:27,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:27,451 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) [2021-12-17 23:59:27,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 23:59:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 2690 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 23:59:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 23:59:28,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:28,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352501039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:28,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:28,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-17 23:59:28,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900453599] [2021-12-17 23:59:28,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:28,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:59:28,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:28,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:59:28,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:59:28,029 INFO L87 Difference]: Start difference. First operand 160 states and 209 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:59:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:28,054 INFO L93 Difference]: Finished difference Result 289 states and 389 transitions. [2021-12-17 23:59:28,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:59:28,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 114 [2021-12-17 23:59:28,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:28,056 INFO L225 Difference]: With dead ends: 289 [2021-12-17 23:59:28,056 INFO L226 Difference]: Without dead ends: 169 [2021-12-17 23:59:28,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:59:28,057 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 20 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:28,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 487 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:59:28,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-17 23:59:28,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2021-12-17 23:59:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 105 states have internal predecessors, (125), 35 states have call successors, (35), 12 states have call predecessors, (35), 12 states have return successors, (39), 34 states have call predecessors, (39), 34 states have call successors, (39) [2021-12-17 23:59:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 199 transitions. [2021-12-17 23:59:28,066 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 199 transitions. Word has length 114 [2021-12-17 23:59:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:28,067 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 199 transitions. [2021-12-17 23:59:28,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:59:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 199 transitions. [2021-12-17 23:59:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-17 23:59:28,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:28,068 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:28,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:28,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:28,284 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:28,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:28,284 INFO L85 PathProgramCache]: Analyzing trace with hash -320167147, now seen corresponding path program 2 times [2021-12-17 23:59:28,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:28,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269341946] [2021-12-17 23:59:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:28,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 23:59:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:59:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:59:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 23:59:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 23:59:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 23:59:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 23:59:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 23:59:28,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:28,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269341946] [2021-12-17 23:59:28,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269341946] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:28,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439047356] [2021-12-17 23:59:28,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:59:28,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:28,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:28,586 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) [2021-12-17 23:59:28,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 23:59:29,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:59:29,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:59:29,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 2702 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 23:59:29,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 23:59:29,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:29,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439047356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:29,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:29,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-17 23:59:29,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593133023] [2021-12-17 23:59:29,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:29,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:59:29,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:29,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:59:29,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 23:59:29,558 INFO L87 Difference]: Start difference. First operand 152 states and 199 transitions. Second operand has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 23:59:29,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:29,674 INFO L93 Difference]: Finished difference Result 277 states and 369 transitions. [2021-12-17 23:59:29,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:59:29,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 118 [2021-12-17 23:59:29,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:29,676 INFO L225 Difference]: With dead ends: 277 [2021-12-17 23:59:29,676 INFO L226 Difference]: Without dead ends: 157 [2021-12-17 23:59:29,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:59:29,678 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 12 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:29,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1206 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:59:29,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-17 23:59:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-12-17 23:59:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 110 states have internal predecessors, (129), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (44), 34 states have call predecessors, (44), 34 states have call successors, (44) [2021-12-17 23:59:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 208 transitions. [2021-12-17 23:59:29,686 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 208 transitions. Word has length 118 [2021-12-17 23:59:29,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:29,686 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 208 transitions. [2021-12-17 23:59:29,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 23:59:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 208 transitions. [2021-12-17 23:59:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 23:59:29,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:29,688 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:29,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:29,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:29,899 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash 363409424, now seen corresponding path program 1 times [2021-12-17 23:59:29,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:29,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708349366] [2021-12-17 23:59:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:29,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:29,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:29,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:29,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:30,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:30,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:30,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:59:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:30,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:30,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:59:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:30,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 23:59:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:30,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 23:59:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:30,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 23:59:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:30,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 23:59:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-17 23:59:30,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:30,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708349366] [2021-12-17 23:59:30,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708349366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:30,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829944695] [2021-12-17 23:59:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:30,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:30,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:30,081 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) [2021-12-17 23:59:30,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 23:59:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:30,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 2707 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 23:59:30,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-17 23:59:30,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:30,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829944695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:30,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:30,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-17 23:59:30,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714469297] [2021-12-17 23:59:30,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:30,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:59:30,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:30,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:59:30,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:59:30,718 INFO L87 Difference]: Start difference. First operand 157 states and 208 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:59:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:30,740 INFO L93 Difference]: Finished difference Result 287 states and 390 transitions. [2021-12-17 23:59:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:59:30,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 120 [2021-12-17 23:59:30,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:30,742 INFO L225 Difference]: With dead ends: 287 [2021-12-17 23:59:30,742 INFO L226 Difference]: Without dead ends: 160 [2021-12-17 23:59:30,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:59:30,744 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 9 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:30,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 480 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:59:30,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-17 23:59:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2021-12-17 23:59:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 110 states have internal predecessors, (127), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (44), 34 states have call predecessors, (44), 34 states have call successors, (44) [2021-12-17 23:59:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 206 transitions. [2021-12-17 23:59:30,752 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 206 transitions. Word has length 120 [2021-12-17 23:59:30,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:30,752 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 206 transitions. [2021-12-17 23:59:30,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:59:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 206 transitions. [2021-12-17 23:59:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 23:59:30,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:30,754 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:30,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-17 23:59:30,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 23:59:30,967 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:30,968 INFO L85 PathProgramCache]: Analyzing trace with hash 363989836, now seen corresponding path program 1 times [2021-12-17 23:59:30,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:30,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282103808] [2021-12-17 23:59:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:30,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:59:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:59:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 23:59:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 23:59:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 23:59:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 23:59:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 23:59:31,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:31,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282103808] [2021-12-17 23:59:31,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282103808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:31,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295727570] [2021-12-17 23:59:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:31,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:31,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:31,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:31,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 23:59:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:31,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 23:59:31,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-17 23:59:31,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:31,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295727570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:31,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:31,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-17 23:59:31,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219121830] [2021-12-17 23:59:31,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:31,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:59:31,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:31,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:59:31,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:59:31,779 INFO L87 Difference]: Start difference. First operand 157 states and 206 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:59:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:31,802 INFO L93 Difference]: Finished difference Result 293 states and 402 transitions. [2021-12-17 23:59:31,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:59:31,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 120 [2021-12-17 23:59:31,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:31,803 INFO L225 Difference]: With dead ends: 293 [2021-12-17 23:59:31,804 INFO L226 Difference]: Without dead ends: 166 [2021-12-17 23:59:31,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:59:31,805 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 34 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:31,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 478 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:59:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-17 23:59:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 153. [2021-12-17 23:59:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 104 states have (on average 1.1538461538461537) internal successors, (120), 106 states have internal predecessors, (120), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (44), 34 states have call predecessors, (44), 34 states have call successors, (44) [2021-12-17 23:59:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 199 transitions. [2021-12-17 23:59:31,812 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 199 transitions. Word has length 120 [2021-12-17 23:59:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:31,813 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 199 transitions. [2021-12-17 23:59:31,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:59:31,813 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 199 transitions. [2021-12-17 23:59:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 23:59:31,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:31,815 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:31,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:32,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:32,035 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:32,036 INFO L85 PathProgramCache]: Analyzing trace with hash -630703862, now seen corresponding path program 1 times [2021-12-17 23:59:32,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:32,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932212108] [2021-12-17 23:59:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:32,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:59:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:59:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 23:59:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 23:59:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 23:59:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 23:59:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-17 23:59:32,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:32,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932212108] [2021-12-17 23:59:32,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932212108] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:32,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329788574] [2021-12-17 23:59:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:32,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:32,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:32,463 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:32,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 23:59:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-17 23:59:32,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:32,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:59:33,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:33,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-17 23:59:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 23:59:33,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:33,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329788574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:33,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:33,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 22 [2021-12-17 23:59:33,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272664021] [2021-12-17 23:59:33,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:33,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 23:59:33,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:33,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 23:59:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:59:33,602 INFO L87 Difference]: Start difference. First operand 153 states and 199 transitions. Second operand has 13 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-17 23:59:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:33,769 INFO L93 Difference]: Finished difference Result 347 states and 458 transitions. [2021-12-17 23:59:33,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 23:59:33,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 120 [2021-12-17 23:59:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:33,771 INFO L225 Difference]: With dead ends: 347 [2021-12-17 23:59:33,771 INFO L226 Difference]: Without dead ends: 226 [2021-12-17 23:59:33,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-12-17 23:59:33,772 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 45 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:33,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1405 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2021-12-17 23:59:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-17 23:59:33,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 191. [2021-12-17 23:59:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 137 states have (on average 1.1605839416058394) internal successors, (159), 140 states have internal predecessors, (159), 37 states have call successors, (37), 14 states have call predecessors, (37), 16 states have return successors, (49), 36 states have call predecessors, (49), 36 states have call successors, (49) [2021-12-17 23:59:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 245 transitions. [2021-12-17 23:59:33,782 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 245 transitions. Word has length 120 [2021-12-17 23:59:33,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:33,782 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 245 transitions. [2021-12-17 23:59:33,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-17 23:59:33,783 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 245 transitions. [2021-12-17 23:59:33,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 23:59:33,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:33,784 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:33,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:34,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 23:59:34,011 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:34,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:34,012 INFO L85 PathProgramCache]: Analyzing trace with hash 936054088, now seen corresponding path program 1 times [2021-12-17 23:59:34,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:34,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107723224] [2021-12-17 23:59:34,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:34,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:59:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:59:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 23:59:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 23:59:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 23:59:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 23:59:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-17 23:59:34,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:34,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107723224] [2021-12-17 23:59:34,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107723224] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:34,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591009672] [2021-12-17 23:59:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:34,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:34,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:34,396 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:34,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 23:59:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:34,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-17 23:59:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:34,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:59:35,491 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 23:59:35,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 11 [2021-12-17 23:59:35,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-17 23:59:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 23:59:35,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:35,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591009672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:35,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:35,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [11] total 24 [2021-12-17 23:59:35,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002312958] [2021-12-17 23:59:35,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:35,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 23:59:35,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 23:59:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-12-17 23:59:35,627 INFO L87 Difference]: Start difference. First operand 191 states and 245 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-17 23:59:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:36,016 INFO L93 Difference]: Finished difference Result 375 states and 488 transitions. [2021-12-17 23:59:36,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 23:59:36,017 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 120 [2021-12-17 23:59:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:36,018 INFO L225 Difference]: With dead ends: 375 [2021-12-17 23:59:36,018 INFO L226 Difference]: Without dead ends: 249 [2021-12-17 23:59:36,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-12-17 23:59:36,020 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 143 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:36,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 968 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 281 Invalid, 0 Unknown, 315 Unchecked, 0.3s Time] [2021-12-17 23:59:36,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-12-17 23:59:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 213. [2021-12-17 23:59:36,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 156 states have (on average 1.141025641025641) internal successors, (178), 160 states have internal predecessors, (178), 37 states have call successors, (37), 16 states have call predecessors, (37), 19 states have return successors, (49), 36 states have call predecessors, (49), 36 states have call successors, (49) [2021-12-17 23:59:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 264 transitions. [2021-12-17 23:59:36,030 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 264 transitions. Word has length 120 [2021-12-17 23:59:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:36,031 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 264 transitions. [2021-12-17 23:59:36,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-17 23:59:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 264 transitions. [2021-12-17 23:59:36,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-17 23:59:36,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:36,032 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:36,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:36,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 23:59:36,259 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:36,259 INFO L85 PathProgramCache]: Analyzing trace with hash -241203708, now seen corresponding path program 2 times [2021-12-17 23:59:36,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:36,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418518571] [2021-12-17 23:59:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:36,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:59:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:59:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 23:59:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 23:59:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 23:59:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 23:59:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-17 23:59:36,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:36,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418518571] [2021-12-17 23:59:36,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418518571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:36,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282802512] [2021-12-17 23:59:36,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:59:36,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:36,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:36,555 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:36,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 23:59:37,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:59:37,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:59:37,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 23:59:37,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 23:59:38,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:38,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282802512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:38,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:38,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-17 23:59:38,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524375366] [2021-12-17 23:59:38,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:38,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:59:38,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:38,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:59:38,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 23:59:38,085 INFO L87 Difference]: Start difference. First operand 213 states and 264 transitions. Second operand has 9 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 23:59:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:38,203 INFO L93 Difference]: Finished difference Result 330 states and 417 transitions. [2021-12-17 23:59:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:59:38,204 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 124 [2021-12-17 23:59:38,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:38,205 INFO L225 Difference]: With dead ends: 330 [2021-12-17 23:59:38,205 INFO L226 Difference]: Without dead ends: 201 [2021-12-17 23:59:38,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:59:38,207 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 12 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:38,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1220 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:59:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-17 23:59:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-12-17 23:59:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 145 states have (on average 1.1241379310344828) internal successors, (163), 148 states have internal predecessors, (163), 37 states have call successors, (37), 16 states have call predecessors, (37), 18 states have return successors, (47), 36 states have call predecessors, (47), 36 states have call successors, (47) [2021-12-17 23:59:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 247 transitions. [2021-12-17 23:59:38,216 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 247 transitions. Word has length 124 [2021-12-17 23:59:38,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:38,216 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 247 transitions. [2021-12-17 23:59:38,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 23:59:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 247 transitions. [2021-12-17 23:59:38,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 23:59:38,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:38,218 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:38,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:38,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 23:59:38,443 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2119383251, now seen corresponding path program 1 times [2021-12-17 23:59:38,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:38,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218404403] [2021-12-17 23:59:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:38,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:59:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 23:59:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 23:59:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:59:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:59:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:59:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-17 23:59:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-17 23:59:38,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:38,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218404403] [2021-12-17 23:59:38,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218404403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:38,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898769799] [2021-12-17 23:59:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:38,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:38,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:38,794 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:38,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 23:59:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:39,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 2749 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 23:59:39,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:39,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:59:39,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-17 23:59:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-17 23:59:39,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:39,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898769799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:39,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:39,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 17 [2021-12-17 23:59:39,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959531301] [2021-12-17 23:59:39,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:39,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 23:59:39,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:39,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 23:59:39,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-12-17 23:59:39,713 INFO L87 Difference]: Start difference. First operand 201 states and 247 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-17 23:59:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:40,188 INFO L93 Difference]: Finished difference Result 359 states and 465 transitions. [2021-12-17 23:59:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 23:59:40,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 127 [2021-12-17 23:59:40,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:40,191 INFO L225 Difference]: With dead ends: 359 [2021-12-17 23:59:40,191 INFO L226 Difference]: Without dead ends: 237 [2021-12-17 23:59:40,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-12-17 23:59:40,192 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 93 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:40,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1348 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 388 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2021-12-17 23:59:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-17 23:59:40,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 207. [2021-12-17 23:59:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 150 states have (on average 1.1133333333333333) internal successors, (167), 154 states have internal predecessors, (167), 37 states have call successors, (37), 16 states have call predecessors, (37), 19 states have return successors, (52), 36 states have call predecessors, (52), 36 states have call successors, (52) [2021-12-17 23:59:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 256 transitions. [2021-12-17 23:59:40,203 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 256 transitions. Word has length 127 [2021-12-17 23:59:40,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:40,203 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 256 transitions. [2021-12-17 23:59:40,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-17 23:59:40,203 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 256 transitions. [2021-12-17 23:59:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 23:59:40,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:40,205 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:40,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:40,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 23:59:40,419 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:40,420 INFO L85 PathProgramCache]: Analyzing trace with hash -616753479, now seen corresponding path program 3 times [2021-12-17 23:59:40,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:40,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743492089] [2021-12-17 23:59:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:40,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:59:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 23:59:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 23:59:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 23:59:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 23:59:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 23:59:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 23:59:40,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:40,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743492089] [2021-12-17 23:59:40,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743492089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:40,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:59:40,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 23:59:40,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048503759] [2021-12-17 23:59:40,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:40,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 23:59:40,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 23:59:40,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-17 23:59:40,776 INFO L87 Difference]: Start difference. First operand 207 states and 256 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 10 states have internal predecessors, (62), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 23:59:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:41,387 INFO L93 Difference]: Finished difference Result 308 states and 386 transitions. [2021-12-17 23:59:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 23:59:41,387 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 10 states have internal predecessors, (62), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 126 [2021-12-17 23:59:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:41,389 INFO L225 Difference]: With dead ends: 308 [2021-12-17 23:59:41,389 INFO L226 Difference]: Without dead ends: 222 [2021-12-17 23:59:41,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:59:41,390 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 159 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:41,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 627 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 23:59:41,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-17 23:59:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2021-12-17 23:59:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 158 states have (on average 1.1139240506329113) internal successors, (176), 164 states have internal predecessors, (176), 38 states have call successors, (38), 16 states have call predecessors, (38), 20 states have return successors, (59), 36 states have call predecessors, (59), 37 states have call successors, (59) [2021-12-17 23:59:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 273 transitions. [2021-12-17 23:59:41,403 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 273 transitions. Word has length 126 [2021-12-17 23:59:41,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:41,403 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 273 transitions. [2021-12-17 23:59:41,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 10 states have internal predecessors, (62), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 23:59:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 273 transitions. [2021-12-17 23:59:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 23:59:41,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:41,405 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:41,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 23:59:41,405 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1896617157, now seen corresponding path program 4 times [2021-12-17 23:59:41,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:41,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204205314] [2021-12-17 23:59:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:41,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:59:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 23:59:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 23:59:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 23:59:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 23:59:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 23:59:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-17 23:59:41,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:41,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204205314] [2021-12-17 23:59:41,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204205314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:41,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698672501] [2021-12-17 23:59:41,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 23:59:41,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:41,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:41,776 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:41,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 23:59:42,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 23:59:42,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:59:42,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 2708 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-17 23:59:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:42,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:59:42,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:42,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-17 23:59:43,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:43,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-17 23:59:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-17 23:59:43,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:43,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698672501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:43,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:43,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [11] total 25 [2021-12-17 23:59:43,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523124671] [2021-12-17 23:59:43,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:43,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:59:43,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:43,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:59:43,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-12-17 23:59:43,454 INFO L87 Difference]: Start difference. First operand 217 states and 273 transitions. Second operand has 16 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 8 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-17 23:59:43,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:43,667 INFO L93 Difference]: Finished difference Result 397 states and 501 transitions. [2021-12-17 23:59:43,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 23:59:43,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 8 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 126 [2021-12-17 23:59:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:43,669 INFO L225 Difference]: With dead ends: 397 [2021-12-17 23:59:43,669 INFO L226 Difference]: Without dead ends: 266 [2021-12-17 23:59:43,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 129 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-12-17 23:59:43,670 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 24 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:43,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 1779 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 156 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2021-12-17 23:59:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-17 23:59:43,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 251. [2021-12-17 23:59:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 187 states have (on average 1.1229946524064172) internal successors, (210), 193 states have internal predecessors, (210), 41 states have call successors, (41), 19 states have call predecessors, (41), 22 states have return successors, (63), 38 states have call predecessors, (63), 40 states have call successors, (63) [2021-12-17 23:59:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 314 transitions. [2021-12-17 23:59:43,682 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 314 transitions. Word has length 126 [2021-12-17 23:59:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:43,682 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 314 transitions. [2021-12-17 23:59:43,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 8 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-17 23:59:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 314 transitions. [2021-12-17 23:59:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 23:59:43,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:43,685 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:43,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:43,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:43,912 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:43,912 INFO L85 PathProgramCache]: Analyzing trace with hash 124986801, now seen corresponding path program 1 times [2021-12-17 23:59:43,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:43,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513056807] [2021-12-17 23:59:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:43,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:59:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 23:59:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 23:59:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:59:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:59:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:59:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-17 23:59:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-17 23:59:44,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:44,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513056807] [2021-12-17 23:59:44,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513056807] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:44,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860044709] [2021-12-17 23:59:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:44,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:44,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:44,300 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:44,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 23:59:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:44,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 2749 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-17 23:59:44,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:44,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:59:44,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:59:45,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:45,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-17 23:59:45,486 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:59:45,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-17 23:59:45,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-17 23:59:45,669 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:59:45,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-12-17 23:59:45,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:45,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-17 23:59:45,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-17 23:59:45,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:45,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-17 23:59:45,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 23:59:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 23:59:46,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:59:48,740 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9| Int) (v_ArrVal_1545 Int) (v_ArrVal_1546 Int)) (or (not (= 0 (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9| (store (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9|) 0 v_ArrVal_1546)) |c_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.offset| 16)) 18446744073709551616))) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9|) 0 v_ArrVal_1545)) |c_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.offset| 8)))))) is different from false [2021-12-17 23:59:48,762 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9| Int) (v_ArrVal_1543 (Array Int Int)) (v_ArrVal_1542 Int) (v_ArrVal_1545 Int) (v_ArrVal_1546 Int)) (or (not (= 0 (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_1543))) (store .cse0 |v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9| (store (select .cse0 |v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9|) 0 v_ArrVal_1545))) |c_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.offset| 8)))) (not (= 0 (mod (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base|) (+ |c_ULTIMATE.start_save_byte_from_array_~storage#1.offset| 8) v_ArrVal_1542)))) (store .cse1 |v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9| (store (select .cse1 |v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9|) 0 v_ArrVal_1546))) |c_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.offset| 16)) 18446744073709551616))))) is different from false [2021-12-17 23:59:48,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860044709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:48,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:59:48,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 25] total 34 [2021-12-17 23:59:48,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443723184] [2021-12-17 23:59:48,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:59:48,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 23:59:48,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:48,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 23:59:48,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1488, Unknown=2, NotChecked=158, Total=1806 [2021-12-17 23:59:48,790 INFO L87 Difference]: Start difference. First operand 251 states and 314 transitions. Second operand has 34 states, 31 states have (on average 4.32258064516129) internal successors, (134), 29 states have internal predecessors, (134), 11 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (25), 8 states have call predecessors, (25), 11 states have call successors, (25) [2021-12-17 23:59:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:49,966 INFO L93 Difference]: Finished difference Result 428 states and 551 transitions. [2021-12-17 23:59:49,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:59:49,967 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 4.32258064516129) internal successors, (134), 29 states have internal predecessors, (134), 11 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (25), 8 states have call predecessors, (25), 11 states have call successors, (25) Word has length 127 [2021-12-17 23:59:49,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:49,969 INFO L225 Difference]: With dead ends: 428 [2021-12-17 23:59:49,969 INFO L226 Difference]: Without dead ends: 287 [2021-12-17 23:59:49,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=327, Invalid=3585, Unknown=2, NotChecked=246, Total=4160 [2021-12-17 23:59:49,971 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 159 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:49,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1129 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 839 Invalid, 0 Unknown, 373 Unchecked, 0.6s Time] [2021-12-17 23:59:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-17 23:59:49,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 269. [2021-12-17 23:59:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 201 states have (on average 1.1144278606965174) internal successors, (224), 206 states have internal predecessors, (224), 43 states have call successors, (43), 21 states have call predecessors, (43), 24 states have return successors, (64), 41 states have call predecessors, (64), 42 states have call successors, (64) [2021-12-17 23:59:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 331 transitions. [2021-12-17 23:59:49,984 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 331 transitions. Word has length 127 [2021-12-17 23:59:49,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:49,984 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 331 transitions. [2021-12-17 23:59:49,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 4.32258064516129) internal successors, (134), 29 states have internal predecessors, (134), 11 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (25), 8 states have call predecessors, (25), 11 states have call successors, (25) [2021-12-17 23:59:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 331 transitions. [2021-12-17 23:59:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-17 23:59:49,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:49,986 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 23:59:50,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:50,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 23:59:50,199 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:50,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:50,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1774992129, now seen corresponding path program 1 times [2021-12-17 23:59:50,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:50,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809387626] [2021-12-17 23:59:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:50,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:59:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 23:59:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 23:59:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 23:59:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-17 23:59:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-17 23:59:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-17 23:59:50,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:50,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809387626] [2021-12-17 23:59:50,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809387626] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:50,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242356066] [2021-12-17 23:59:50,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:50,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:50,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:50,458 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:50,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 23:59:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:50,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 2715 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 23:59:50,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-17 23:59:51,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:59:51,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242356066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:59:51,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:51,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-17 23:59:51,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249619372] [2021-12-17 23:59:51,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:59:51,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:59:51,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:59:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 23:59:51,067 INFO L87 Difference]: Start difference. First operand 269 states and 331 transitions. Second operand has 9 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 23:59:51,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:51,166 INFO L93 Difference]: Finished difference Result 401 states and 504 transitions. [2021-12-17 23:59:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:59:51,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2021-12-17 23:59:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:51,168 INFO L225 Difference]: With dead ends: 401 [2021-12-17 23:59:51,168 INFO L226 Difference]: Without dead ends: 262 [2021-12-17 23:59:51,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:59:51,170 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 12 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:51,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1213 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:59:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-17 23:59:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-12-17 23:59:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 194 states have (on average 1.097938144329897) internal successors, (213), 199 states have internal predecessors, (213), 43 states have call successors, (43), 21 states have call predecessors, (43), 24 states have return successors, (62), 41 states have call predecessors, (62), 42 states have call successors, (62) [2021-12-17 23:59:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 318 transitions. [2021-12-17 23:59:51,181 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 318 transitions. Word has length 130 [2021-12-17 23:59:51,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:51,181 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 318 transitions. [2021-12-17 23:59:51,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 23:59:51,181 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 318 transitions. [2021-12-17 23:59:51,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-17 23:59:51,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:51,182 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:51,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:51,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:51,392 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:51,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1768002988, now seen corresponding path program 1 times [2021-12-17 23:59:51,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:51,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22805378] [2021-12-17 23:59:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:51,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:59:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 23:59:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 23:59:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 23:59:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 23:59:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-17 23:59:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-17 23:59:51,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22805378] [2021-12-17 23:59:51,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22805378] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:51,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663119189] [2021-12-17 23:59:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:51,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:51,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:51,778 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:51,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 23:59:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:52,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-17 23:59:52,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:52,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:59:52,442 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:59:52,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2021-12-17 23:59:52,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-12-17 23:59:52,542 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:59:52,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 29 [2021-12-17 23:59:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 69 proven. 44 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 23:59:53,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:59:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-17 23:59:53,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663119189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:59:53,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:59:53,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 9] total 32 [2021-12-17 23:59:53,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068385383] [2021-12-17 23:59:53,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:59:53,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 23:59:53,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:53,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 23:59:53,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-12-17 23:59:53,551 INFO L87 Difference]: Start difference. First operand 262 states and 318 transitions. Second operand has 32 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 12 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 9 states have call predecessors, (27), 11 states have call successors, (27) [2021-12-17 23:59:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:56,519 INFO L93 Difference]: Finished difference Result 468 states and 606 transitions. [2021-12-17 23:59:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 23:59:56,519 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 12 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 9 states have call predecessors, (27), 11 states have call successors, (27) Word has length 132 [2021-12-17 23:59:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:56,521 INFO L225 Difference]: With dead ends: 468 [2021-12-17 23:59:56,521 INFO L226 Difference]: Without dead ends: 336 [2021-12-17 23:59:56,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 270 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=525, Invalid=4031, Unknown=0, NotChecked=0, Total=4556 [2021-12-17 23:59:56,524 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 413 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 2979 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 3792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 2979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:56,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 1589 Invalid, 3792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 2979 Invalid, 0 Unknown, 514 Unchecked, 1.8s Time] [2021-12-17 23:59:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-17 23:59:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 279. [2021-12-17 23:59:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 203 states have (on average 1.0935960591133005) internal successors, (222), 207 states have internal predecessors, (222), 49 states have call successors, (49), 22 states have call predecessors, (49), 26 states have return successors, (73), 49 states have call predecessors, (73), 48 states have call successors, (73) [2021-12-17 23:59:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 344 transitions. [2021-12-17 23:59:56,538 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 344 transitions. Word has length 132 [2021-12-17 23:59:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:56,539 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 344 transitions. [2021-12-17 23:59:56,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 12 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 9 states have call predecessors, (27), 11 states have call successors, (27) [2021-12-17 23:59:56,539 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 344 transitions. [2021-12-17 23:59:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-17 23:59:56,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:56,541 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:56,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-17 23:59:56,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:56,755 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:56,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:56,756 INFO L85 PathProgramCache]: Analyzing trace with hash -448953133, now seen corresponding path program 1 times [2021-12-17 23:59:56,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:56,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010955143] [2021-12-17 23:59:56,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:56,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:56,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:56,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:59:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:56,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:59:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:56,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:56,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:59:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:56,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:59:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:56,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:59:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:56,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 23:59:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:56,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 23:59:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:56,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:59:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:57,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:59:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:57,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:59:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:57,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 23:59:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 60 proven. 7 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-17 23:59:57,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:57,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010955143] [2021-12-17 23:59:57,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010955143] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:57,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828102001] [2021-12-17 23:59:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:57,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:57,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:57,176 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:57,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 23:59:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:57,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 2774 conjuncts, 129 conjunts are in the unsatisfiable core [2021-12-17 23:59:57,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:57,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:59:58,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:58,278 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-17 23:59:58,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 44 [2021-12-17 23:59:58,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:58,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:58,965 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 23:59:58,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 95 [2021-12-17 23:59:59,142 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-17 23:59:59,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 114 [2021-12-17 23:59:59,146 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-17 23:59:59,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:59:59,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-17 23:59:59,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786186419] [2021-12-17 23:59:59,147 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 23:59:59,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 23:59:59,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 23:59:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-12-17 23:59:59,148 INFO L87 Difference]: Start difference. First operand 279 states and 344 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 23:59:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 23:59:59,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-12-17 23:59:59,150 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:59,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:59:59,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:59,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:59,365 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@41e02e97 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-17 23:59:59,368 INFO L158 Benchmark]: Toolchain (without parser) took 49764.36ms. Allocated memory was 111.1MB in the beginning and 400.6MB in the end (delta: 289.4MB). Free memory was 72.7MB in the beginning and 165.8MB in the end (delta: -93.1MB). Peak memory consumption was 198.4MB. Max. memory is 16.1GB. [2021-12-17 23:59:59,368 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 77.6MB. Free memory was 43.1MB in the beginning and 43.0MB in the end (delta: 40.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 23:59:59,368 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1967.27ms. Allocated memory was 111.1MB in the beginning and 153.1MB in the end (delta: 41.9MB). Free memory was 72.5MB in the beginning and 73.0MB in the end (delta: -499.5kB). Peak memory consumption was 61.2MB. Max. memory is 16.1GB. [2021-12-17 23:59:59,369 INFO L158 Benchmark]: Boogie Procedure Inliner took 206.65ms. Allocated memory is still 153.1MB. Free memory was 73.0MB in the beginning and 100.9MB in the end (delta: -27.9MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2021-12-17 23:59:59,369 INFO L158 Benchmark]: Boogie Preprocessor took 94.52ms. Allocated memory is still 153.1MB. Free memory was 100.9MB in the beginning and 93.8MB in the end (delta: 7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 23:59:59,369 INFO L158 Benchmark]: RCFGBuilder took 1024.15ms. Allocated memory was 153.1MB in the beginning and 195.0MB in the end (delta: 41.9MB). Free memory was 93.8MB in the beginning and 137.5MB in the end (delta: -43.7MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. [2021-12-17 23:59:59,369 INFO L158 Benchmark]: TraceAbstraction took 46466.55ms. Allocated memory was 195.0MB in the beginning and 400.6MB in the end (delta: 205.5MB). Free memory was 137.5MB in the beginning and 165.8MB in the end (delta: -28.3MB). Peak memory consumption was 176.8MB. Max. memory is 16.1GB. [2021-12-17 23:59:59,370 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 77.6MB. Free memory was 43.1MB in the beginning and 43.0MB in the end (delta: 40.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1967.27ms. Allocated memory was 111.1MB in the beginning and 153.1MB in the end (delta: 41.9MB). Free memory was 72.5MB in the beginning and 73.0MB in the end (delta: -499.5kB). Peak memory consumption was 61.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 206.65ms. Allocated memory is still 153.1MB. Free memory was 73.0MB in the beginning and 100.9MB in the end (delta: -27.9MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 94.52ms. Allocated memory is still 153.1MB. Free memory was 100.9MB in the beginning and 93.8MB in the end (delta: 7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 1024.15ms. Allocated memory was 153.1MB in the beginning and 195.0MB in the end (delta: 41.9MB). Free memory was 93.8MB in the beginning and 137.5MB in the end (delta: -43.7MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. * TraceAbstraction took 46466.55ms. Allocated memory was 195.0MB in the beginning and 400.6MB in the end (delta: 205.5MB). Free memory was 137.5MB in the beginning and 165.8MB in the end (delta: -28.3MB). Peak memory consumption was 176.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@41e02e97 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@41e02e97: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-17 23:59:59,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_byte_buf_write_be16_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.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 e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 00:00:01,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 00:00:01,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 00:00:01,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 00:00:01,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 00:00:01,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 00:00:01,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 00:00:01,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 00:00:01,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 00:00:01,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 00:00:01,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 00:00:01,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 00:00:01,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 00:00:01,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 00:00:01,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 00:00:01,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 00:00:01,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 00:00:01,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 00:00:01,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 00:00:01,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 00:00:01,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 00:00:01,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 00:00:01,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 00:00:01,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 00:00:01,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 00:00:01,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 00:00:01,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 00:00:01,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 00:00:01,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 00:00:01,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 00:00:01,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 00:00:01,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 00:00:01,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 00:00:01,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 00:00:01,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 00:00:01,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 00:00:01,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 00:00:01,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 00:00:01,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 00:00:01,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 00:00:01,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 00:00:01,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-12-18 00:00:01,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 00:00:01,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 00:00:01,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 00:00:01,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 00:00:01,404 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 00:00:01,404 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 00:00:01,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 00:00:01,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 00:00:01,406 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 00:00:01,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 00:00:01,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 00:00:01,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 00:00:01,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 00:00:01,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 00:00:01,408 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 00:00:01,408 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 00:00:01,408 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 00:00:01,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 00:00:01,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 00:00:01,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 00:00:01,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 00:00:01,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 00:00:01,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 00:00:01,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:00:01,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 00:00:01,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 00:00:01,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 00:00:01,410 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 00:00:01,410 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 00:00:01,410 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 00:00:01,411 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 00:00:01,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 00:00:01,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 00:00:01,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 00:00:01,411 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 [2021-12-18 00:00:01,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 00:00:01,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 00:00:01,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 00:00:01,692 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 00:00:01,693 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 00:00:01,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-12-18 00:00:01,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcb8134c6/a2389ae303254ad7b595b0226202e3d4/FLAG188bae0d3 [2021-12-18 00:00:02,488 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 00:00:02,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-12-18 00:00:02,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcb8134c6/a2389ae303254ad7b595b0226202e3d4/FLAG188bae0d3 [2021-12-18 00:00:02,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcb8134c6/a2389ae303254ad7b595b0226202e3d4 [2021-12-18 00:00:02,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 00:00:02,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 00:00:02,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 00:00:02,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 00:00:02,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 00:00:02,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:00:02" (1/1) ... [2021-12-18 00:00:02,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df6e065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:02, skipping insertion in model container [2021-12-18 00:00:02,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:00:02" (1/1) ... [2021-12-18 00:00:02,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 00:00:02,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:00:03,066 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_byte_buf_write_be16_harness.i[4497,4510] [2021-12-18 00:00:03,071 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_byte_buf_write_be16_harness.i[4557,4570] [2021-12-18 00:00:03,664 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:03,665 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:03,666 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:03,667 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:03,669 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:03,686 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:03,686 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:03,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:03,689 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:03,944 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:00:03,945 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:00:03,946 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:00:03,947 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:00:03,948 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:00:03,949 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:00:03,949 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:00:03,950 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:00:03,950 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:00:03,951 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:00:04,058 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:00:04,139 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,139 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:00:04,258 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 00:00:04,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:00:04,334 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_byte_buf_write_be16_harness.i[4497,4510] [2021-12-18 00:00:04,334 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_byte_buf_write_be16_harness.i[4557,4570] [2021-12-18 00:00:04,385 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,386 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,386 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,387 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,387 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,391 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,392 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,392 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,393 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,450 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:00:04,451 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:00:04,452 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:00:04,452 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:00:04,453 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:00:04,454 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:00:04,454 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:00:04,454 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:00:04,455 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:00:04,455 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:00:04,485 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:00:04,555 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,555 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:00:04,610 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 00:00:04,621 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_byte_buf_write_be16_harness.i[4497,4510] [2021-12-18 00:00:04,621 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_byte_buf_write_be16_harness.i[4557,4570] [2021-12-18 00:00:04,646 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,646 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,646 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,647 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,647 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,651 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,651 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,651 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,652 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,674 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:00:04,674 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:00:04,675 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:00:04,675 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:00:04,676 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:00:04,676 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:00:04,676 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:00:04,676 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:00:04,677 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:00:04,677 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:00:04,704 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:00:04,755 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,756 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:00:04,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:00:05,055 INFO L208 MainTranslator]: Completed translation [2021-12-18 00:00:05,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:05 WrapperNode [2021-12-18 00:00:05,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 00:00:05,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 00:00:05,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 00:00:05,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 00:00:05,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:05" (1/1) ... [2021-12-18 00:00:05,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:05" (1/1) ... [2021-12-18 00:00:05,231 INFO L137 Inliner]: procedures = 711, calls = 2619, calls flagged for inlining = 62, calls inlined = 10, statements flattened = 867 [2021-12-18 00:00:05,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 00:00:05,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 00:00:05,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 00:00:05,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 00:00:05,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:05" (1/1) ... [2021-12-18 00:00:05,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:05" (1/1) ... [2021-12-18 00:00:05,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:05" (1/1) ... [2021-12-18 00:00:05,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:05" (1/1) ... [2021-12-18 00:00:05,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:05" (1/1) ... [2021-12-18 00:00:05,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:05" (1/1) ... [2021-12-18 00:00:05,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:05" (1/1) ... [2021-12-18 00:00:05,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 00:00:05,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 00:00:05,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 00:00:05,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 00:00:05,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:05" (1/1) ... [2021-12-18 00:00:05,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:00:05,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:00:05,397 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) [2021-12-18 00:00:05,420 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 [2021-12-18 00:00:05,437 INFO L130 BoogieDeclarations]: Found specification of procedure htons [2021-12-18 00:00:05,437 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-18 00:00:05,437 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-18 00:00:05,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 00:00:05,437 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-18 00:00:05,437 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-18 00:00:05,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-18 00:00:05,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-18 00:00:05,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-12-18 00:00:05,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 00:00:05,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 00:00:05,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 00:00:05,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 00:00:05,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 00:00:05,439 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-18 00:00:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-18 00:00:05,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 00:00:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 00:00:05,440 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-18 00:00:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-18 00:00:05,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-18 00:00:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-18 00:00:05,441 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-18 00:00:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-12-18 00:00:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-12-18 00:00:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 00:00:05,442 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 00:00:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-18 00:00:05,442 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-18 00:00:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 00:00:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 00:00:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-12-18 00:00:05,443 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-12-18 00:00:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-12-18 00:00:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-18 00:00:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-12-18 00:00:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 00:00:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-18 00:00:05,444 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-18 00:00:05,727 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 00:00:05,728 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 00:00:06,906 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 00:00:06,916 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 00:00:06,918 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-18 00:00:06,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:00:06 BoogieIcfgContainer [2021-12-18 00:00:06,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 00:00:06,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 00:00:06,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 00:00:06,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 00:00:06,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 12:00:02" (1/3) ... [2021-12-18 00:00:06,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6f0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:00:06, skipping insertion in model container [2021-12-18 00:00:06,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:00:05" (2/3) ... [2021-12-18 00:00:06,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6f0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:00:06, skipping insertion in model container [2021-12-18 00:00:06,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:00:06" (3/3) ... [2021-12-18 00:00:06,933 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_be16_harness.i [2021-12-18 00:00:06,938 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 00:00:06,939 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 00:00:06,999 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 00:00:07,010 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 00:00:07,011 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 00:00:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-18 00:00:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-18 00:00:07,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:07,042 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:07,042 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:07,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1408968499, now seen corresponding path program 1 times [2021-12-18 00:00:07,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:07,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307284848] [2021-12-18 00:00:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:07,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:07,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:07,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:07,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 00:00:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-18 00:00:08,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-18 00:00:08,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:00:08,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:08,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307284848] [2021-12-18 00:00:08,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307284848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:08,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:08,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 00:00:08,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898757905] [2021-12-18 00:00:08,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:08,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 00:00:08,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 00:00:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 00:00:08,337 INFO L87 Difference]: Start difference. First operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-18 00:00:08,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:08,377 INFO L93 Difference]: Finished difference Result 260 states and 369 transitions. [2021-12-18 00:00:08,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 00:00:08,379 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-12-18 00:00:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:08,385 INFO L225 Difference]: With dead ends: 260 [2021-12-18 00:00:08,385 INFO L226 Difference]: Without dead ends: 127 [2021-12-18 00:00:08,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 00:00:08,392 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:08,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:00:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-18 00:00:08,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-18 00:00:08,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 83 states have internal predecessors, (99), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-18 00:00:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2021-12-18 00:00:08,438 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 86 [2021-12-18 00:00:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:08,438 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2021-12-18 00:00:08,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-18 00:00:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2021-12-18 00:00:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-18 00:00:08,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:08,442 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:08,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-18 00:00:08,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:08,644 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:08,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:08,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1559261231, now seen corresponding path program 1 times [2021-12-18 00:00:08,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:08,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443020273] [2021-12-18 00:00:08,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:08,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:08,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:08,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:08,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 00:00:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:09,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 00:00:09,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-18 00:00:09,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:00:09,762 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:09,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443020273] [2021-12-18 00:00:09,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443020273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:09,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:09,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 00:00:09,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122080956] [2021-12-18 00:00:09,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:09,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 00:00:09,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 00:00:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:00:09,766 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-18 00:00:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:10,011 INFO L93 Difference]: Finished difference Result 232 states and 311 transitions. [2021-12-18 00:00:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:00:10,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 86 [2021-12-18 00:00:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:10,015 INFO L225 Difference]: With dead ends: 232 [2021-12-18 00:00:10,015 INFO L226 Difference]: Without dead ends: 130 [2021-12-18 00:00:10,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:00:10,017 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 48 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:10,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 534 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 00:00:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-18 00:00:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-18 00:00:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-12-18 00:00:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 172 transitions. [2021-12-18 00:00:10,034 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 172 transitions. Word has length 86 [2021-12-18 00:00:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:10,034 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 172 transitions. [2021-12-18 00:00:10,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-18 00:00:10,035 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 172 transitions. [2021-12-18 00:00:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-18 00:00:10,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:10,037 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:10,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-18 00:00:10,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:10,252 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:10,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:10,252 INFO L85 PathProgramCache]: Analyzing trace with hash -112396410, now seen corresponding path program 1 times [2021-12-18 00:00:10,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:10,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349372130] [2021-12-18 00:00:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:10,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:10,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:10,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:10,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 00:00:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 00:00:11,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:11,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:00:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-18 00:00:12,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:00:12,041 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:12,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349372130] [2021-12-18 00:00:12,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349372130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:12,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:12,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 00:00:12,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046520022] [2021-12-18 00:00:12,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:12,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 00:00:12,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:12,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 00:00:12,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-18 00:00:12,043 INFO L87 Difference]: Start difference. First operand 130 states and 172 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-18 00:00:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:12,313 INFO L93 Difference]: Finished difference Result 247 states and 331 transitions. [2021-12-18 00:00:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 00:00:12,314 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 92 [2021-12-18 00:00:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:12,316 INFO L225 Difference]: With dead ends: 247 [2021-12-18 00:00:12,316 INFO L226 Difference]: Without dead ends: 137 [2021-12-18 00:00:12,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:00:12,318 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 40 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:12,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 913 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-18 00:00:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-18 00:00:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-12-18 00:00:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 92 states have internal predecessors, (110), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-12-18 00:00:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 181 transitions. [2021-12-18 00:00:12,337 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 181 transitions. Word has length 92 [2021-12-18 00:00:12,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:12,338 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 181 transitions. [2021-12-18 00:00:12,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-18 00:00:12,338 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 181 transitions. [2021-12-18 00:00:12,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-18 00:00:12,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:12,341 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:12,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 00:00:12,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:12,564 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:12,564 INFO L85 PathProgramCache]: Analyzing trace with hash 89427524, now seen corresponding path program 1 times [2021-12-18 00:00:12,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:12,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200724742] [2021-12-18 00:00:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:12,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:12,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:12,567 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:12,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 00:00:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:13,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1536 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 00:00:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-18 00:00:13,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:00:13,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:13,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200724742] [2021-12-18 00:00:13,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200724742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:13,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:13,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 00:00:13,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245172286] [2021-12-18 00:00:13,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:13,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:00:13,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:13,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:00:13,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 00:00:13,593 INFO L87 Difference]: Start difference. First operand 137 states and 181 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-18 00:00:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:13,640 INFO L93 Difference]: Finished difference Result 252 states and 345 transitions. [2021-12-18 00:00:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:00:13,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 92 [2021-12-18 00:00:13,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:13,643 INFO L225 Difference]: With dead ends: 252 [2021-12-18 00:00:13,643 INFO L226 Difference]: Without dead ends: 147 [2021-12-18 00:00:13,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:00:13,644 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 20 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:13,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 490 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:00:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-18 00:00:13,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2021-12-18 00:00:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 92 states have internal predecessors, (110), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-12-18 00:00:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 181 transitions. [2021-12-18 00:00:13,659 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 181 transitions. Word has length 92 [2021-12-18 00:00:13,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:13,659 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 181 transitions. [2021-12-18 00:00:13,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-18 00:00:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 181 transitions. [2021-12-18 00:00:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 00:00:13,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:13,661 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:13,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-18 00:00:13,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:13,868 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:13,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1213803650, now seen corresponding path program 1 times [2021-12-18 00:00:13,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:13,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421105414] [2021-12-18 00:00:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:13,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:13,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:13,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:13,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 00:00:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:14,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 00:00:14,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-18 00:00:15,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:00:15,324 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:15,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421105414] [2021-12-18 00:00:15,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421105414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:15,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:15,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 00:00:15,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197998941] [2021-12-18 00:00:15,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:15,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 00:00:15,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:15,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 00:00:15,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:00:15,326 INFO L87 Difference]: Start difference. First operand 137 states and 181 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-18 00:00:16,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:16,384 INFO L93 Difference]: Finished difference Result 264 states and 363 transitions. [2021-12-18 00:00:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:00:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 96 [2021-12-18 00:00:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:16,389 INFO L225 Difference]: With dead ends: 264 [2021-12-18 00:00:16,389 INFO L226 Difference]: Without dead ends: 157 [2021-12-18 00:00:16,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 00:00:16,390 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 23 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:16,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 597 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 41 Unchecked, 0.9s Time] [2021-12-18 00:00:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-18 00:00:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 150. [2021-12-18 00:00:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 103 states have (on average 1.2135922330097086) internal successors, (125), 105 states have internal predecessors, (125), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-12-18 00:00:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 201 transitions. [2021-12-18 00:00:16,412 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 201 transitions. Word has length 96 [2021-12-18 00:00:16,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:16,413 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 201 transitions. [2021-12-18 00:00:16,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-18 00:00:16,413 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 201 transitions. [2021-12-18 00:00:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 00:00:16,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:16,415 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:16,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-18 00:00:16,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:16,620 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:16,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:16,620 INFO L85 PathProgramCache]: Analyzing trace with hash 747771008, now seen corresponding path program 1 times [2021-12-18 00:00:16,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:16,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926905284] [2021-12-18 00:00:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:16,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:16,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:16,623 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:16,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 00:00:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:17,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 00:00:17,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-18 00:00:19,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:00:19,049 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:19,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926905284] [2021-12-18 00:00:19,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926905284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:19,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:19,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 00:00:19,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622924108] [2021-12-18 00:00:19,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:19,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 00:00:19,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:19,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 00:00:19,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-18 00:00:19,051 INFO L87 Difference]: Start difference. First operand 150 states and 201 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-18 00:00:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:20,586 INFO L93 Difference]: Finished difference Result 280 states and 382 transitions. [2021-12-18 00:00:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 00:00:20,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 96 [2021-12-18 00:00:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:20,591 INFO L225 Difference]: With dead ends: 280 [2021-12-18 00:00:20,591 INFO L226 Difference]: Without dead ends: 162 [2021-12-18 00:00:20,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-18 00:00:20,592 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 25 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:20,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 1530 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 322 Unchecked, 1.3s Time] [2021-12-18 00:00:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-18 00:00:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 153. [2021-12-18 00:00:20,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 108 states have internal predecessors, (129), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-12-18 00:00:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 205 transitions. [2021-12-18 00:00:20,604 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 205 transitions. Word has length 96 [2021-12-18 00:00:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:20,604 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 205 transitions. [2021-12-18 00:00:20,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-18 00:00:20,605 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 205 transitions. [2021-12-18 00:00:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 00:00:20,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:20,606 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:20,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 00:00:20,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:20,828 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1945771076, now seen corresponding path program 1 times [2021-12-18 00:00:20,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:20,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596558525] [2021-12-18 00:00:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:20,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:20,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:20,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:20,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 00:00:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:21,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 00:00:21,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-18 00:00:21,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:00:21,761 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:21,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596558525] [2021-12-18 00:00:21,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596558525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:21,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:21,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 00:00:21,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655325040] [2021-12-18 00:00:21,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:21,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:00:21,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:21,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:00:21,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 00:00:21,762 INFO L87 Difference]: Start difference. First operand 153 states and 205 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-18 00:00:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:21,817 INFO L93 Difference]: Finished difference Result 290 states and 396 transitions. [2021-12-18 00:00:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:00:21,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 96 [2021-12-18 00:00:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:21,823 INFO L225 Difference]: With dead ends: 290 [2021-12-18 00:00:21,823 INFO L226 Difference]: Without dead ends: 169 [2021-12-18 00:00:21,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:00:21,825 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 26 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:21,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 518 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:00:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-18 00:00:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2021-12-18 00:00:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 102 states have (on average 1.196078431372549) internal successors, (122), 104 states have internal predecessors, (122), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-12-18 00:00:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 198 transitions. [2021-12-18 00:00:21,835 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 198 transitions. Word has length 96 [2021-12-18 00:00:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:21,835 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 198 transitions. [2021-12-18 00:00:21,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-18 00:00:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 198 transitions. [2021-12-18 00:00:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 00:00:21,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:21,837 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:21,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-18 00:00:22,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:22,052 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2000163974, now seen corresponding path program 1 times [2021-12-18 00:00:22,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:22,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934789754] [2021-12-18 00:00:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:22,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:22,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:22,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:22,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 00:00:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:22,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1543 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 00:00:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-18 00:00:22,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:00:22,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:22,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934789754] [2021-12-18 00:00:22,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934789754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:22,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:22,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 00:00:22,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128222225] [2021-12-18 00:00:22,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:22,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:00:22,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:00:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-18 00:00:22,951 INFO L87 Difference]: Start difference. First operand 149 states and 198 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-18 00:00:23,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:23,223 INFO L93 Difference]: Finished difference Result 277 states and 378 transitions. [2021-12-18 00:00:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 00:00:23,226 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 96 [2021-12-18 00:00:23,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:23,227 INFO L225 Difference]: With dead ends: 277 [2021-12-18 00:00:23,227 INFO L226 Difference]: Without dead ends: 158 [2021-12-18 00:00:23,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-18 00:00:23,229 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 12 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:23,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1181 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 00:00:23,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-18 00:00:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 147. [2021-12-18 00:00:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 100 states have (on average 1.19) internal successors, (119), 102 states have internal predecessors, (119), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-12-18 00:00:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2021-12-18 00:00:23,245 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 96 [2021-12-18 00:00:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:23,246 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2021-12-18 00:00:23,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-18 00:00:23,246 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2021-12-18 00:00:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-18 00:00:23,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:23,248 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:23,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-18 00:00:23,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:23,456 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:23,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1531546949, now seen corresponding path program 1 times [2021-12-18 00:00:23,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:23,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101467795] [2021-12-18 00:00:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:23,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:23,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:23,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:23,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 00:00:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:24,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 00:00:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-18 00:00:24,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:00:24,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:24,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101467795] [2021-12-18 00:00:24,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101467795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:24,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:24,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 00:00:24,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966662768] [2021-12-18 00:00:24,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:24,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 00:00:24,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:24,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 00:00:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 00:00:24,888 INFO L87 Difference]: Start difference. First operand 147 states and 195 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-18 00:00:25,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:25,895 INFO L93 Difference]: Finished difference Result 273 states and 375 transitions. [2021-12-18 00:00:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:00:25,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 98 [2021-12-18 00:00:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:25,899 INFO L225 Difference]: With dead ends: 273 [2021-12-18 00:00:25,899 INFO L226 Difference]: Without dead ends: 154 [2021-12-18 00:00:25,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:00:25,900 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 21 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:25,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 712 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 87 Unchecked, 0.9s Time] [2021-12-18 00:00:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-18 00:00:25,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 147. [2021-12-18 00:00:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 100 states have (on average 1.17) internal successors, (117), 102 states have internal predecessors, (117), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-12-18 00:00:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 193 transitions. [2021-12-18 00:00:25,909 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 193 transitions. Word has length 98 [2021-12-18 00:00:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:25,909 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 193 transitions. [2021-12-18 00:00:25,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-18 00:00:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 193 transitions. [2021-12-18 00:00:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-18 00:00:25,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:25,911 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:25,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 00:00:26,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:26,115 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:26,116 INFO L85 PathProgramCache]: Analyzing trace with hash -892177611, now seen corresponding path program 1 times [2021-12-18 00:00:26,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:26,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493895498] [2021-12-18 00:00:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:26,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:26,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:26,118 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:26,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 00:00:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:26,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1547 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 00:00:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-18 00:00:27,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:00:27,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:27,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493895498] [2021-12-18 00:00:27,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493895498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:27,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:27,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 00:00:27,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974799594] [2021-12-18 00:00:27,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:27,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 00:00:27,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:27,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 00:00:27,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 00:00:27,124 INFO L87 Difference]: Start difference. First operand 147 states and 193 transitions. Second operand has 6 states, 5 states have (on average 11.2) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-18 00:00:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:27,315 INFO L93 Difference]: Finished difference Result 258 states and 340 transitions. [2021-12-18 00:00:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 00:00:27,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.2) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 98 [2021-12-18 00:00:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:27,317 INFO L225 Difference]: With dead ends: 258 [2021-12-18 00:00:27,317 INFO L226 Difference]: Without dead ends: 147 [2021-12-18 00:00:27,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:00:27,318 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 65 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:27,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 670 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 00:00:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-18 00:00:27,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-12-18 00:00:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 100 states have (on average 1.17) internal successors, (117), 102 states have internal predecessors, (117), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (41), 33 states have call predecessors, (41), 33 states have call successors, (41) [2021-12-18 00:00:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 192 transitions. [2021-12-18 00:00:27,331 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 192 transitions. Word has length 98 [2021-12-18 00:00:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:27,332 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 192 transitions. [2021-12-18 00:00:27,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.2) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-18 00:00:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 192 transitions. [2021-12-18 00:00:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-18 00:00:27,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:27,334 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:27,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-18 00:00:27,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:27,555 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:27,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:27,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2139077398, now seen corresponding path program 1 times [2021-12-18 00:00:27,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:27,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473359194] [2021-12-18 00:00:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:27,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:27,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:27,558 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:27,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 00:00:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:28,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1560 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 00:00:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 00:00:28,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:00:28,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:28,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473359194] [2021-12-18 00:00:28,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473359194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:28,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:28,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 00:00:28,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774624709] [2021-12-18 00:00:28,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:28,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:00:28,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:28,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:00:28,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:00:28,648 INFO L87 Difference]: Start difference. First operand 147 states and 192 transitions. Second operand has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-18 00:00:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:29,053 INFO L93 Difference]: Finished difference Result 252 states and 329 transitions. [2021-12-18 00:00:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:00:29,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 104 [2021-12-18 00:00:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:29,056 INFO L225 Difference]: With dead ends: 252 [2021-12-18 00:00:29,056 INFO L226 Difference]: Without dead ends: 144 [2021-12-18 00:00:29,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-18 00:00:29,057 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 84 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:29,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 934 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 00:00:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-18 00:00:29,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-12-18 00:00:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 98 states have (on average 1.163265306122449) internal successors, (114), 99 states have internal predecessors, (114), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2021-12-18 00:00:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 186 transitions. [2021-12-18 00:00:29,068 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 186 transitions. Word has length 104 [2021-12-18 00:00:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:29,068 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 186 transitions. [2021-12-18 00:00:29,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-18 00:00:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 186 transitions. [2021-12-18 00:00:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 00:00:29,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:29,071 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:29,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-18 00:00:29,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:29,281 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:29,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:29,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1375170240, now seen corresponding path program 1 times [2021-12-18 00:00:29,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:29,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010329608] [2021-12-18 00:00:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:29,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:29,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:29,283 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:29,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 00:00:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:30,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 00:00:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:31,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:00:31,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 155 treesize of output 59 [2021-12-18 00:00:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 00:00:31,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:00:31,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:31,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010329608] [2021-12-18 00:00:31,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010329608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:31,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:31,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-18 00:00:31,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588565313] [2021-12-18 00:00:31,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:31,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 00:00:31,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:31,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 00:00:31,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:00:31,668 INFO L87 Difference]: Start difference. First operand 144 states and 186 transitions. Second operand has 13 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 6 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-18 00:00:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:35,043 INFO L93 Difference]: Finished difference Result 304 states and 396 transitions. [2021-12-18 00:00:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 00:00:35,044 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 6 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 116 [2021-12-18 00:00:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:35,045 INFO L225 Difference]: With dead ends: 304 [2021-12-18 00:00:35,045 INFO L226 Difference]: Without dead ends: 207 [2021-12-18 00:00:35,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-12-18 00:00:35,046 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 143 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:35,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1765 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 545 Invalid, 0 Unknown, 63 Unchecked, 2.6s Time] [2021-12-18 00:00:35,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-18 00:00:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 182. [2021-12-18 00:00:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 132 states have internal predecessors, (151), 37 states have call successors, (37), 13 states have call predecessors, (37), 14 states have return successors, (47), 36 states have call predecessors, (47), 36 states have call successors, (47) [2021-12-18 00:00:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 235 transitions. [2021-12-18 00:00:35,056 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 235 transitions. Word has length 116 [2021-12-18 00:00:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:35,056 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 235 transitions. [2021-12-18 00:00:35,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 6 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-18 00:00:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 235 transitions. [2021-12-18 00:00:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 00:00:35,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:35,058 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:35,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-18 00:00:35,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:35,271 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash 925652350, now seen corresponding path program 1 times [2021-12-18 00:00:35,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:35,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733410278] [2021-12-18 00:00:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:35,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:35,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:35,274 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:35,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-18 00:00:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:36,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 00:00:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 00:00:38,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:00:41,580 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-18 00:00:41,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-18 00:00:41,594 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-18 00:00:41,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-12-18 00:00:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-18 00:00:41,709 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:41,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733410278] [2021-12-18 00:00:41,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733410278] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:00:41,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:00:41,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 31 [2021-12-18 00:00:41,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887320588] [2021-12-18 00:00:41,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:00:41,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 00:00:41,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:41,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 00:00:41,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-12-18 00:00:41,712 INFO L87 Difference]: Start difference. First operand 182 states and 235 transitions. Second operand has 31 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 26 states have internal predecessors, (103), 8 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2021-12-18 00:00:46,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:46,351 INFO L93 Difference]: Finished difference Result 247 states and 321 transitions. [2021-12-18 00:00:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 00:00:46,352 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 26 states have internal predecessors, (103), 8 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) Word has length 116 [2021-12-18 00:00:46,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:46,354 INFO L225 Difference]: With dead ends: 247 [2021-12-18 00:00:46,354 INFO L226 Difference]: Without dead ends: 245 [2021-12-18 00:00:46,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 204 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=395, Invalid=2685, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 00:00:46,358 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 166 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 3374 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:46,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 3374 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 972 Invalid, 0 Unknown, 149 Unchecked, 2.5s Time] [2021-12-18 00:00:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-18 00:00:46,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2021-12-18 00:00:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 153 states have (on average 1.1568627450980393) internal successors, (177), 156 states have internal predecessors, (177), 41 states have call successors, (41), 16 states have call predecessors, (41), 18 states have return successors, (59), 40 states have call predecessors, (59), 40 states have call successors, (59) [2021-12-18 00:00:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 277 transitions. [2021-12-18 00:00:46,374 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 277 transitions. Word has length 116 [2021-12-18 00:00:46,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:46,376 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 277 transitions. [2021-12-18 00:00:46,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 26 states have internal predecessors, (103), 8 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2021-12-18 00:00:46,377 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 277 transitions. [2021-12-18 00:00:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-18 00:00:46,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:46,378 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:46,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-18 00:00:46,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:46,599 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:46,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:46,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1015786308, now seen corresponding path program 1 times [2021-12-18 00:00:46,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:46,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990294773] [2021-12-18 00:00:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:46,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:46,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:46,602 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:46,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 00:00:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:47,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 00:00:47,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 00:00:49,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:00:52,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:00:52,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2021-12-18 00:00:52,317 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-18 00:00:52,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-18 00:00:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-18 00:00:52,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:00:52,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990294773] [2021-12-18 00:00:52,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990294773] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:00:52,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:00:52,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-12-18 00:00:52,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712835505] [2021-12-18 00:00:52,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:00:52,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 00:00:52,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:00:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 00:00:52,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-12-18 00:00:52,454 INFO L87 Difference]: Start difference. First operand 213 states and 277 transitions. Second operand has 23 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 7 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2021-12-18 00:00:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:56,047 INFO L93 Difference]: Finished difference Result 333 states and 425 transitions. [2021-12-18 00:00:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 00:00:56,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 7 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 120 [2021-12-18 00:00:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:56,049 INFO L225 Difference]: With dead ends: 333 [2021-12-18 00:00:56,049 INFO L226 Difference]: Without dead ends: 242 [2021-12-18 00:00:56,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 221 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=328, Invalid=1564, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 00:00:56,051 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 204 mSDsluCounter, 1720 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:56,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1898 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 585 Invalid, 0 Unknown, 131 Unchecked, 2.1s Time] [2021-12-18 00:00:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-18 00:00:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 213. [2021-12-18 00:00:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 153 states have (on average 1.1503267973856208) internal successors, (176), 156 states have internal predecessors, (176), 41 states have call successors, (41), 16 states have call predecessors, (41), 18 states have return successors, (58), 40 states have call predecessors, (58), 40 states have call successors, (58) [2021-12-18 00:00:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 275 transitions. [2021-12-18 00:00:56,066 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 275 transitions. Word has length 120 [2021-12-18 00:00:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:56,066 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 275 transitions. [2021-12-18 00:00:56,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 7 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2021-12-18 00:00:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 275 transitions. [2021-12-18 00:00:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-18 00:00:56,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:56,069 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:56,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-18 00:00:56,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:00:56,283 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:56,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2110590710, now seen corresponding path program 1 times [2021-12-18 00:00:56,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:00:56,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136687293] [2021-12-18 00:00:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:56,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:00:56,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:00:56,287 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:00:56,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 00:00:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:57,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 00:00:57,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 81 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 00:00:59,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:01:08,936 WARN L227 SmtUtils]: Spent 7.69s on a formula simplification. DAG size of input: 527 DAG size of output: 273 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-18 00:01:08,938 INFO L354 Elim1Store]: treesize reduction 897, result has 45.1 percent of original size [2021-12-18 00:01:08,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 132 treesize of output 771 Killed by 15