./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_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_cursor_compare_lexical_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 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 00:12:27,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 00:12:27,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 00:12:27,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 00:12:27,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 00:12:27,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 00:12:27,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 00:12:27,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 00:12:27,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 00:12:27,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 00:12:27,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 00:12:27,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 00:12:27,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 00:12:27,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 00:12:27,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 00:12:27,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 00:12:27,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 00:12:27,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 00:12:27,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 00:12:27,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 00:12:27,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 00:12:27,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 00:12:27,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 00:12:27,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 00:12:27,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 00:12:27,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 00:12:27,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 00:12:27,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 00:12:27,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 00:12:27,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 00:12:27,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 00:12:27,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 00:12:27,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 00:12:27,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 00:12:27,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 00:12:27,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 00:12:27,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 00:12:27,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 00:12:27,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 00:12:27,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 00:12:27,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 00:12:27,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-18 00:12:27,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 00:12:27,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 00:12:27,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 00:12:27,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 00:12:27,448 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 00:12:27,448 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 00:12:27,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 00:12:27,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 00:12:27,449 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 00:12:27,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 00:12:27,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 00:12:27,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 00:12:27,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 00:12:27,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 00:12:27,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 00:12:27,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 00:12:27,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 00:12:27,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 00:12:27,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 00:12:27,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 00:12:27,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 00:12:27,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:12:27,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 00:12:27,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 00:12:27,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 00:12:27,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 00:12:27,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 00:12:27,452 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 00:12:27,452 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 00:12:27,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 00:12:27,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 00:12:27,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 [2021-12-18 00:12:27,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 00:12:27,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 00:12:27,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 00:12:27,655 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 00:12:27,656 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 00:12:27,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-12-18 00:12:27,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd9c2e87/b733831411114f9ea8c65f3aaa64fa68/FLAGe59d061f4 [2021-12-18 00:12:28,247 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 00:12:28,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-12-18 00:12:28,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd9c2e87/b733831411114f9ea8c65f3aaa64fa68/FLAGe59d061f4 [2021-12-18 00:12:28,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd9c2e87/b733831411114f9ea8c65f3aaa64fa68 [2021-12-18 00:12:28,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 00:12:28,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 00:12:28,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 00:12:28,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 00:12:28,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 00:12:28,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:12:28" (1/1) ... [2021-12-18 00:12:28,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c81816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:28, skipping insertion in model container [2021-12-18 00:12:28,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:12:28" (1/1) ... [2021-12-18 00:12:28,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 00:12:28,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:12:28,997 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_cursor_compare_lexical_harness.i[4505,4518] [2021-12-18 00:12:29,002 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_cursor_compare_lexical_harness.i[4565,4578] [2021-12-18 00:12:29,479 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:29,484 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:29,484 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:29,485 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:29,486 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:29,499 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:29,502 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:29,503 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:29,504 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:29,706 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:12:29,707 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:12:29,708 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:12:29,709 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:12:29,709 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:12:29,710 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:12:29,710 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:12:29,711 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:12:29,711 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:12:29,711 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:12:29,794 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:12:29,896 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:29,896 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:29,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:12:30,022 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 00:12:30,041 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_cursor_compare_lexical_harness.i[4505,4518] [2021-12-18 00:12:30,042 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_cursor_compare_lexical_harness.i[4565,4578] [2021-12-18 00:12:30,062 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:30,063 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:30,063 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:30,063 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:30,064 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:30,067 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:30,067 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:30,068 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:30,068 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:30,098 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:12:30,099 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:12:30,100 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:12:30,100 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:12:30,101 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:12:30,101 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:12:30,101 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:12:30,102 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:12:30,102 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:12:30,102 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:12:30,114 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:12:30,155 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:30,155 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:12:30,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:12:30,376 INFO L208 MainTranslator]: Completed translation [2021-12-18 00:12:30,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:30 WrapperNode [2021-12-18 00:12:30,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 00:12:30,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 00:12:30,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 00:12:30,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 00:12:30,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:30" (1/1) ... [2021-12-18 00:12:30,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:30" (1/1) ... [2021-12-18 00:12:30,554 INFO L137 Inliner]: procedures = 691, calls = 2656, calls flagged for inlining = 59, calls inlined = 6, statements flattened = 925 [2021-12-18 00:12:30,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 00:12:30,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 00:12:30,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 00:12:30,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 00:12:30,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:30" (1/1) ... [2021-12-18 00:12:30,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:30" (1/1) ... [2021-12-18 00:12:30,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:30" (1/1) ... [2021-12-18 00:12:30,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:30" (1/1) ... [2021-12-18 00:12:30,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:30" (1/1) ... [2021-12-18 00:12:30,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:30" (1/1) ... [2021-12-18 00:12:30,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:30" (1/1) ... [2021-12-18 00:12:30,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 00:12:30,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 00:12:30,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 00:12:30,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 00:12:30,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:30" (1/1) ... [2021-12-18 00:12:30,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:12:30,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:12:30,674 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 00:12:30,692 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 00:12:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-18 00:12:30,703 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-18 00:12:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_compare_lexical [2021-12-18 00:12:30,703 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_compare_lexical [2021-12-18 00:12:30,704 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-18 00:12:30,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 00:12:30,704 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-18 00:12:30,704 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-18 00:12:30,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 00:12:30,704 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_bounded [2021-12-18 00:12:30,705 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_bounded [2021-12-18 00:12:30,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 00:12:30,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 00:12:30,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 00:12:30,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 00:12:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-18 00:12:30,707 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-18 00:12:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 00:12:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 00:12:30,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 00:12:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-18 00:12:30,707 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-18 00:12:30,708 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-18 00:12:30,708 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-18 00:12:30,708 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 00:12:30,708 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 00:12:30,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 00:12:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 00:12:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 00:12:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-18 00:12:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-18 00:12:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 00:12:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-12-18 00:12:30,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-12-18 00:12:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 00:12:30,932 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 00:12:30,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 00:12:31,482 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 00:12:31,489 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 00:12:31,489 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-18 00:12:31,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:12:31 BoogieIcfgContainer [2021-12-18 00:12:31,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 00:12:31,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 00:12:31,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 00:12:31,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 00:12:31,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 12:12:28" (1/3) ... [2021-12-18 00:12:31,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496bfbdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:12:31, skipping insertion in model container [2021-12-18 00:12:31,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:12:30" (2/3) ... [2021-12-18 00:12:31,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496bfbdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:12:31, skipping insertion in model container [2021-12-18 00:12:31,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:12:31" (3/3) ... [2021-12-18 00:12:31,496 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_compare_lexical_harness.i [2021-12-18 00:12:31,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 00:12:31,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 00:12:31,544 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 00:12:31,553 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 00:12:31,553 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 00:12:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand has 151 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-18 00:12:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-18 00:12:31,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:31,589 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:12:31,589 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:31,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:31,593 INFO L85 PathProgramCache]: Analyzing trace with hash 616113637, now seen corresponding path program 1 times [2021-12-18 00:12:31,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:31,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343251260] [2021-12-18 00:12:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:31,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:12:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:12:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:12:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-18 00:12:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:12:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:12:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-18 00:12:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:12:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-18 00:12:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:12:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:12:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-18 00:12:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-18 00:12:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-18 00:12:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-18 00:12:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-18 00:12:32,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:32,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343251260] [2021-12-18 00:12:32,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343251260] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:12:32,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605055645] [2021-12-18 00:12:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:32,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:32,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:12:32,341 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) [2021-12-18 00:12:32,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 00:12:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:32,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 00:12:32,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:12:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-18 00:12:32,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:12:32,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605055645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:12:32,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:12:32,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-18 00:12:32,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705186988] [2021-12-18 00:12:32,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:12:32,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 00:12:32,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:33,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 00:12:33,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:12:33,019 INFO L87 Difference]: Start difference. First operand has 151 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-18 00:12:33,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:33,197 INFO L93 Difference]: Finished difference Result 301 states and 447 transitions. [2021-12-18 00:12:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 00:12:33,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 120 [2021-12-18 00:12:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:33,206 INFO L225 Difference]: With dead ends: 301 [2021-12-18 00:12:33,206 INFO L226 Difference]: Without dead ends: 148 [2021-12-18 00:12:33,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-18 00:12:33,211 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 222 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:33,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 432 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:12:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-18 00:12:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-12-18 00:12:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 46 states have call successors, (46), 11 states have call predecessors, (46), 12 states have return successors, (51), 45 states have call predecessors, (51), 45 states have call successors, (51) [2021-12-18 00:12:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 204 transitions. [2021-12-18 00:12:33,260 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 204 transitions. Word has length 120 [2021-12-18 00:12:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:33,261 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 204 transitions. [2021-12-18 00:12:33,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-18 00:12:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 204 transitions. [2021-12-18 00:12:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-18 00:12:33,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:33,266 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:33,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 00:12:33,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-18 00:12:33,488 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:33,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash 138900842, now seen corresponding path program 1 times [2021-12-18 00:12:33,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:33,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908481499] [2021-12-18 00:12:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:33,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:12:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:12:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:12:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:12:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:12:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:12:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:12:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-18 00:12:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-18 00:12:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 00:12:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-18 00:12:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-18 00:12:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:12:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-18 00:12:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 00:12:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-18 00:12:33,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:33,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908481499] [2021-12-18 00:12:33,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908481499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:12:33,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269737461] [2021-12-18 00:12:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:33,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:33,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:12:33,847 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) [2021-12-18 00:12:33,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 00:12:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:34,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 00:12:34,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:12:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-18 00:12:34,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:12:34,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269737461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:12:34,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:12:34,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-12-18 00:12:34,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763997849] [2021-12-18 00:12:34,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:12:34,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:12:34,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:34,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:12:34,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:12:34,507 INFO L87 Difference]: Start difference. First operand 148 states and 204 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-18 00:12:34,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:34,799 INFO L93 Difference]: Finished difference Result 242 states and 337 transitions. [2021-12-18 00:12:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:12:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 122 [2021-12-18 00:12:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:34,801 INFO L225 Difference]: With dead ends: 242 [2021-12-18 00:12:34,801 INFO L226 Difference]: Without dead ends: 148 [2021-12-18 00:12:34,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-12-18 00:12:34,803 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 233 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:34,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 621 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 00:12:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-18 00:12:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-12-18 00:12:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 46 states have call successors, (46), 11 states have call predecessors, (46), 12 states have return successors, (49), 45 states have call predecessors, (49), 45 states have call successors, (49) [2021-12-18 00:12:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-12-18 00:12:34,813 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 122 [2021-12-18 00:12:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:34,814 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-12-18 00:12:34,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-18 00:12:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-12-18 00:12:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-18 00:12:34,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:34,816 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:12:34,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 00:12:35,036 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,SelfDestructingSolverStorable1 [2021-12-18 00:12:35,037 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:35,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:35,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2034710092, now seen corresponding path program 2 times [2021-12-18 00:12:35,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:35,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417569475] [2021-12-18 00:12:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:35,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:12:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:12:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:12:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:12:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:12:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:12:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:12:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-18 00:12:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:12:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:12:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 00:12:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 00:12:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 00:12:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:12:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-18 00:12:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-18 00:12:35,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:35,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417569475] [2021-12-18 00:12:35,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417569475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:12:35,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326833029] [2021-12-18 00:12:35,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:12:35,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:35,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:12:35,317 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) [2021-12-18 00:12:35,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 00:12:35,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 00:12:35,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:12:35,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 2312 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 00:12:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:12:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-18 00:12:35,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:12:35,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326833029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:12:35,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:12:35,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-12-18 00:12:35,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049242459] [2021-12-18 00:12:35,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:12:35,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:12:35,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:35,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:12:35,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:12:35,914 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-18 00:12:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:35,967 INFO L93 Difference]: Finished difference Result 160 states and 221 transitions. [2021-12-18 00:12:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:12:35,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 126 [2021-12-18 00:12:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:35,969 INFO L225 Difference]: With dead ends: 160 [2021-12-18 00:12:35,970 INFO L226 Difference]: Without dead ends: 158 [2021-12-18 00:12:35,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-12-18 00:12:35,971 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 16 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:35,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1354 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:12:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-18 00:12:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-12-18 00:12:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 98 states have internal predecessors, (113), 47 states have call successors, (47), 12 states have call predecessors, (47), 14 states have return successors, (58), 46 states have call predecessors, (58), 46 states have call successors, (58) [2021-12-18 00:12:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 218 transitions. [2021-12-18 00:12:35,982 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 218 transitions. Word has length 126 [2021-12-18 00:12:35,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:35,983 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 218 transitions. [2021-12-18 00:12:35,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-18 00:12:35,983 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 218 transitions. [2021-12-18 00:12:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-18 00:12:35,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:35,985 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:12:36,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 00:12:36,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:36,205 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1275067964, now seen corresponding path program 1 times [2021-12-18 00:12:36,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:36,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998556427] [2021-12-18 00:12:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:36,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:12:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:12:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:12:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:12:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:12:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:12:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:12:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-18 00:12:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:12:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:12:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 00:12:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 00:12:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 00:12:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:12:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-18 00:12:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-18 00:12:36,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:36,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998556427] [2021-12-18 00:12:36,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998556427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:12:36,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459381238] [2021-12-18 00:12:36,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:36,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:36,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:12:36,496 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) [2021-12-18 00:12:36,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 00:12:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:36,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 2726 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 00:12:36,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:12:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-18 00:12:37,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:12:37,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459381238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:12:37,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:12:37,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-12-18 00:12:37,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998472162] [2021-12-18 00:12:37,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:12:37,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:12:37,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:37,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:12:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:12:37,168 INFO L87 Difference]: Start difference. First operand 157 states and 218 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-18 00:12:37,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:37,463 INFO L93 Difference]: Finished difference Result 307 states and 437 transitions. [2021-12-18 00:12:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:12:37,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 130 [2021-12-18 00:12:37,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:37,466 INFO L225 Difference]: With dead ends: 307 [2021-12-18 00:12:37,466 INFO L226 Difference]: Without dead ends: 187 [2021-12-18 00:12:37,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-12-18 00:12:37,467 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 277 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:37,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 708 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 00:12:37,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-18 00:12:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-12-18 00:12:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 114 states have internal predecessors, (133), 60 states have call successors, (60), 13 states have call predecessors, (60), 15 states have return successors, (73), 59 states have call predecessors, (73), 59 states have call successors, (73) [2021-12-18 00:12:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 266 transitions. [2021-12-18 00:12:37,479 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 266 transitions. Word has length 130 [2021-12-18 00:12:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:37,480 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 266 transitions. [2021-12-18 00:12:37,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-18 00:12:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 266 transitions. [2021-12-18 00:12:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-18 00:12:37,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:37,482 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:37,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 00:12:37,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:37,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1527536575, now seen corresponding path program 1 times [2021-12-18 00:12:37,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:37,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105218136] [2021-12-18 00:12:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:37,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:12:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:12:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:12:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:12:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:12:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:12:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:12:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-18 00:12:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:12:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:12:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-18 00:12:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-18 00:12:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-18 00:12:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-18 00:12:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-18 00:12:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-18 00:12:38,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:38,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105218136] [2021-12-18 00:12:38,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105218136] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:12:38,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262126285] [2021-12-18 00:12:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:38,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:38,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:12:38,396 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) [2021-12-18 00:12:38,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 00:12:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:38,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 2731 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 00:12:38,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:12:38,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-18 00:12:38,945 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 [2021-12-18 00:12:39,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 00:12:39,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 00:12:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-18 00:12:39,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:12:39,834 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 38 treesize of output 32 [2021-12-18 00:12:39,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:12:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:12:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-18 00:12:39,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262126285] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:12:39,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:12:39,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 12] total 31 [2021-12-18 00:12:39,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78407581] [2021-12-18 00:12:39,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:12:39,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 00:12:39,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:39,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 00:12:39,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2021-12-18 00:12:39,888 INFO L87 Difference]: Start difference. First operand 187 states and 266 transitions. Second operand has 31 states, 27 states have (on average 4.074074074074074) internal successors, (110), 24 states have internal predecessors, (110), 14 states have call successors, (56), 7 states have call predecessors, (56), 8 states have return successors, (54), 11 states have call predecessors, (54), 13 states have call successors, (54) [2021-12-18 00:12:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:42,449 INFO L93 Difference]: Finished difference Result 493 states and 719 transitions. [2021-12-18 00:12:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 00:12:42,450 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 4.074074074074074) internal successors, (110), 24 states have internal predecessors, (110), 14 states have call successors, (56), 7 states have call predecessors, (56), 8 states have return successors, (54), 11 states have call predecessors, (54), 13 states have call successors, (54) Word has length 132 [2021-12-18 00:12:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:42,452 INFO L225 Difference]: With dead ends: 493 [2021-12-18 00:12:42,452 INFO L226 Difference]: Without dead ends: 288 [2021-12-18 00:12:42,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 284 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=267, Invalid=2703, Unknown=0, NotChecked=0, Total=2970 [2021-12-18 00:12:42,455 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 290 mSDsluCounter, 1657 mSDsCounter, 0 mSdLazyCounter, 3520 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1828 SdHoareTripleChecker+Invalid, 4312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 3520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:42,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 1828 Invalid, 4312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 3520 Invalid, 0 Unknown, 550 Unchecked, 1.9s Time] [2021-12-18 00:12:42,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-18 00:12:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 273. [2021-12-18 00:12:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 158 states have (on average 1.1962025316455696) internal successors, (189), 164 states have internal predecessors, (189), 95 states have call successors, (95), 15 states have call predecessors, (95), 19 states have return successors, (123), 93 states have call predecessors, (123), 94 states have call successors, (123) [2021-12-18 00:12:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 407 transitions. [2021-12-18 00:12:42,480 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 407 transitions. Word has length 132 [2021-12-18 00:12:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:42,480 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 407 transitions. [2021-12-18 00:12:42,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 4.074074074074074) internal successors, (110), 24 states have internal predecessors, (110), 14 states have call successors, (56), 7 states have call predecessors, (56), 8 states have return successors, (54), 11 states have call predecessors, (54), 13 states have call successors, (54) [2021-12-18 00:12:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 407 transitions. [2021-12-18 00:12:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-18 00:12:42,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:42,482 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:42,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-18 00:12:42,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:42,697 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash -132654696, now seen corresponding path program 1 times [2021-12-18 00:12:42,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:42,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129616537] [2021-12-18 00:12:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:42,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:12:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:12:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:12:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:12:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:12:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:12:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 00:12:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-18 00:12:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 00:12:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-18 00:12:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-18 00:12:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:12:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-18 00:12:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 00:12:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:12:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-18 00:12:43,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:43,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129616537] [2021-12-18 00:12:43,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129616537] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:12:43,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381438753] [2021-12-18 00:12:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:43,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:43,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:12:43,434 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) [2021-12-18 00:12:43,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 00:12:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:43,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 2766 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 00:12:43,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:12:43,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 00:12:44,038 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 00:12:44,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 00:12:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-18 00:12:45,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:12:45,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381438753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:12:45,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:12:45,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [22] total 38 [2021-12-18 00:12:45,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401193817] [2021-12-18 00:12:45,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:12:45,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 00:12:45,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 00:12:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 00:12:45,655 INFO L87 Difference]: Start difference. First operand 273 states and 407 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) [2021-12-18 00:12:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:46,446 INFO L93 Difference]: Finished difference Result 469 states and 693 transitions. [2021-12-18 00:12:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 00:12:46,446 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) Word has length 143 [2021-12-18 00:12:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:46,449 INFO L225 Difference]: With dead ends: 469 [2021-12-18 00:12:46,449 INFO L226 Difference]: Without dead ends: 355 [2021-12-18 00:12:46,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 142 SyntacticMatches, 27 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=165, Invalid=2091, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 00:12:46,451 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 177 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 744 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:46,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 1277 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1188 Invalid, 0 Unknown, 744 Unchecked, 0.6s Time] [2021-12-18 00:12:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-18 00:12:46,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 331. [2021-12-18 00:12:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 198 states have (on average 1.1818181818181819) internal successors, (234), 207 states have internal predecessors, (234), 107 states have call successors, (107), 18 states have call predecessors, (107), 25 states have return successors, (149), 105 states have call predecessors, (149), 106 states have call successors, (149) [2021-12-18 00:12:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 490 transitions. [2021-12-18 00:12:46,486 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 490 transitions. Word has length 143 [2021-12-18 00:12:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:46,487 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 490 transitions. [2021-12-18 00:12:46,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) [2021-12-18 00:12:46,488 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 490 transitions. [2021-12-18 00:12:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-18 00:12:46,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:46,492 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:46,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 00:12:46,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:46,708 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:46,709 INFO L85 PathProgramCache]: Analyzing trace with hash 125510742, now seen corresponding path program 1 times [2021-12-18 00:12:46,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:46,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134569762] [2021-12-18 00:12:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:46,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:46,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:46,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:12:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:12:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:12:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:12:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:12:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:12:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 00:12:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-18 00:12:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 00:12:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-18 00:12:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-18 00:12:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:12:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-18 00:12:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 00:12:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:12:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-18 00:12:47,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:47,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134569762] [2021-12-18 00:12:47,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134569762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:12:47,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795390401] [2021-12-18 00:12:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:47,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:47,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:12:47,332 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) [2021-12-18 00:12:47,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 00:12:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:47,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 00:12:47,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:12:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-12-18 00:12:47,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:12:47,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795390401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:12:47,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:12:47,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [20] total 22 [2021-12-18 00:12:47,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24177200] [2021-12-18 00:12:47,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:12:47,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:12:47,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:47,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:12:47,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-12-18 00:12:47,964 INFO L87 Difference]: Start difference. First operand 331 states and 490 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, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-18 00:12:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:48,059 INFO L93 Difference]: Finished difference Result 648 states and 985 transitions. [2021-12-18 00:12:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 00:12:48,060 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, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 143 [2021-12-18 00:12:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:48,062 INFO L225 Difference]: With dead ends: 648 [2021-12-18 00:12:48,063 INFO L226 Difference]: Without dead ends: 324 [2021-12-18 00:12:48,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-12-18 00:12:48,065 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 3 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:48,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 525 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2021-12-18 00:12:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-18 00:12:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2021-12-18 00:12:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 192 states have (on average 1.171875) internal successors, (225), 200 states have internal predecessors, (225), 107 states have call successors, (107), 18 states have call predecessors, (107), 24 states have return successors, (142), 105 states have call predecessors, (142), 106 states have call successors, (142) [2021-12-18 00:12:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 474 transitions. [2021-12-18 00:12:48,088 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 474 transitions. Word has length 143 [2021-12-18 00:12:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:48,088 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 474 transitions. [2021-12-18 00:12:48,089 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, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-18 00:12:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 474 transitions. [2021-12-18 00:12:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-18 00:12:48,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:48,090 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:48,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 00:12:48,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:48,311 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:48,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:48,312 INFO L85 PathProgramCache]: Analyzing trace with hash -845476291, now seen corresponding path program 1 times [2021-12-18 00:12:48,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:48,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247911538] [2021-12-18 00:12:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:48,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:12:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:12:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:12:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:12:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:12:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:12:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 00:12:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-18 00:12:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 00:12:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-18 00:12:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-18 00:12:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:12:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-18 00:12:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 00:12:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:12:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-18 00:12:48,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:48,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247911538] [2021-12-18 00:12:48,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247911538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:12:48,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:12:48,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-18 00:12:48,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335853657] [2021-12-18 00:12:48,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:12:48,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 00:12:48,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:48,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 00:12:48,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:12:48,643 INFO L87 Difference]: Start difference. First operand 324 states and 474 transitions. Second operand has 13 states, 12 states have (on average 4.583333333333333) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-18 00:12:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:49,254 INFO L93 Difference]: Finished difference Result 344 states and 518 transitions. [2021-12-18 00:12:49,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 00:12:49,255 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.583333333333333) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 145 [2021-12-18 00:12:49,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:49,256 INFO L225 Difference]: With dead ends: 344 [2021-12-18 00:12:49,257 INFO L226 Difference]: Without dead ends: 342 [2021-12-18 00:12:49,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-12-18 00:12:49,257 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 225 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:49,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1110 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 00:12:49,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-18 00:12:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 330. [2021-12-18 00:12:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 197 states have (on average 1.16751269035533) internal successors, (230), 206 states have internal predecessors, (230), 107 states have call successors, (107), 18 states have call predecessors, (107), 25 states have return successors, (164), 105 states have call predecessors, (164), 106 states have call successors, (164) [2021-12-18 00:12:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 501 transitions. [2021-12-18 00:12:49,279 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 501 transitions. Word has length 145 [2021-12-18 00:12:49,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:49,279 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 501 transitions. [2021-12-18 00:12:49,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.583333333333333) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-18 00:12:49,279 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 501 transitions. [2021-12-18 00:12:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-18 00:12:49,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:49,281 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:49,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 00:12:49,282 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash -144411713, now seen corresponding path program 1 times [2021-12-18 00:12:49,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:49,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203553694] [2021-12-18 00:12:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:49,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:12:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:12:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:12:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:12:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:12:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:12:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 00:12:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-18 00:12:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 00:12:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-18 00:12:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-18 00:12:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:12:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-18 00:12:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 00:12:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:12:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-18 00:12:49,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:49,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203553694] [2021-12-18 00:12:49,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203553694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:12:49,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:12:49,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-18 00:12:49,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185006334] [2021-12-18 00:12:49,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:12:49,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 00:12:49,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:49,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 00:12:49,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-18 00:12:49,659 INFO L87 Difference]: Start difference. First operand 330 states and 501 transitions. Second operand has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-18 00:12:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:50,558 INFO L93 Difference]: Finished difference Result 349 states and 537 transitions. [2021-12-18 00:12:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 00:12:50,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 145 [2021-12-18 00:12:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:50,560 INFO L225 Difference]: With dead ends: 349 [2021-12-18 00:12:50,560 INFO L226 Difference]: Without dead ends: 347 [2021-12-18 00:12:50,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-12-18 00:12:50,561 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 240 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:50,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1270 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 00:12:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-18 00:12:50,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 329. [2021-12-18 00:12:50,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 196 states have (on average 1.1683673469387754) internal successors, (229), 205 states have internal predecessors, (229), 107 states have call successors, (107), 18 states have call predecessors, (107), 25 states have return successors, (157), 105 states have call predecessors, (157), 106 states have call successors, (157) [2021-12-18 00:12:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 493 transitions. [2021-12-18 00:12:50,582 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 493 transitions. Word has length 145 [2021-12-18 00:12:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:50,583 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 493 transitions. [2021-12-18 00:12:50,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-18 00:12:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 493 transitions. [2021-12-18 00:12:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-18 00:12:50,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:50,585 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 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, 1, 1, 1, 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 00:12:50,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 00:12:50,585 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:50,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:50,585 INFO L85 PathProgramCache]: Analyzing trace with hash -338314884, now seen corresponding path program 1 times [2021-12-18 00:12:50,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:50,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162255487] [2021-12-18 00:12:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:50,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:12:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:12:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:12:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:12:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:12:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:12:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:12:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 00:12:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 00:12:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 00:12:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:50,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 00:12:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:51,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-18 00:12:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:51,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-18 00:12:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:51,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-18 00:12:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:51,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:12:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:51,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-18 00:12:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-12-18 00:12:51,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:51,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162255487] [2021-12-18 00:12:51,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162255487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:12:51,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379808737] [2021-12-18 00:12:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:51,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:51,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:12:51,058 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) [2021-12-18 00:12:51,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 00:12:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:51,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 2813 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 00:12:51,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:12:51,548 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 [2021-12-18 00:12:51,858 INFO L354 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2021-12-18 00:12:51,858 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 2 case distinctions, treesize of input 40 treesize of output 45 [2021-12-18 00:12:51,940 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 00:12:51,941 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 44 treesize of output 24 [2021-12-18 00:12:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 160 proven. 12 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-18 00:12:52,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:12:52,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379808737] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:12:52,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:12:52,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 20 [2021-12-18 00:12:52,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037182234] [2021-12-18 00:12:52,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:12:52,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 00:12:52,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:52,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 00:12:52,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-12-18 00:12:52,418 INFO L87 Difference]: Start difference. First operand 329 states and 493 transitions. Second operand has 20 states, 19 states have (on average 5.631578947368421) internal successors, (107), 17 states have internal predecessors, (107), 9 states have call successors, (46), 7 states have call predecessors, (46), 6 states have return successors, (43), 8 states have call predecessors, (43), 9 states have call successors, (43) [2021-12-18 00:12:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:53,814 INFO L93 Difference]: Finished difference Result 730 states and 1126 transitions. [2021-12-18 00:12:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 00:12:53,814 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.631578947368421) internal successors, (107), 17 states have internal predecessors, (107), 9 states have call successors, (46), 7 states have call predecessors, (46), 6 states have return successors, (43), 8 states have call predecessors, (43), 9 states have call successors, (43) Word has length 150 [2021-12-18 00:12:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:53,817 INFO L225 Difference]: With dead ends: 730 [2021-12-18 00:12:53,817 INFO L226 Difference]: Without dead ends: 492 [2021-12-18 00:12:53,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 268 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 00:12:53,819 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 300 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 2451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 445 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:53,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1158 Invalid, 2451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1724 Invalid, 0 Unknown, 445 Unchecked, 1.0s Time] [2021-12-18 00:12:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-12-18 00:12:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 442. [2021-12-18 00:12:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 258 states have (on average 1.1317829457364341) internal successors, (292), 265 states have internal predecessors, (292), 156 states have call successors, (156), 22 states have call predecessors, (156), 27 states have return successors, (217), 154 states have call predecessors, (217), 155 states have call successors, (217) [2021-12-18 00:12:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 665 transitions. [2021-12-18 00:12:53,852 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 665 transitions. Word has length 150 [2021-12-18 00:12:53,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:53,853 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 665 transitions. [2021-12-18 00:12:53,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.631578947368421) internal successors, (107), 17 states have internal predecessors, (107), 9 states have call successors, (46), 7 states have call predecessors, (46), 6 states have return successors, (43), 8 states have call predecessors, (43), 9 states have call successors, (43) [2021-12-18 00:12:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 665 transitions. [2021-12-18 00:12:53,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-18 00:12:53,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:53,855 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:12:53,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 00:12:54,076 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 [2021-12-18 00:12:54,076 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:54,077 INFO L85 PathProgramCache]: Analyzing trace with hash -386866604, now seen corresponding path program 1 times [2021-12-18 00:12:54,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:54,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645539828] [2021-12-18 00:12:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:54,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:12:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:12:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:12:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:12:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:12:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:12:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 00:12:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-18 00:12:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 00:12:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-18 00:12:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-18 00:12:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:12:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-18 00:12:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 00:12:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:12:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-18 00:12:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:12:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-12-18 00:12:54,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:54,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645539828] [2021-12-18 00:12:54,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645539828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:12:54,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:12:54,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 00:12:54,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397099691] [2021-12-18 00:12:54,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:12:54,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 00:12:54,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:54,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 00:12:54,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:12:54,385 INFO L87 Difference]: Start difference. First operand 442 states and 665 transitions. Second operand has 11 states, 10 states have (on average 5.3) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2021-12-18 00:12:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:54,905 INFO L93 Difference]: Finished difference Result 456 states and 682 transitions. [2021-12-18 00:12:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 00:12:54,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 153 [2021-12-18 00:12:54,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:54,909 INFO L225 Difference]: With dead ends: 456 [2021-12-18 00:12:54,909 INFO L226 Difference]: Without dead ends: 454 [2021-12-18 00:12:54,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-12-18 00:12:54,910 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 148 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:54,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 881 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 00:12:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-18 00:12:54,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 450. [2021-12-18 00:12:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 261 states have (on average 1.1302681992337165) internal successors, (295), 268 states have internal predecessors, (295), 160 states have call successors, (160), 23 states have call predecessors, (160), 28 states have return successors, (221), 158 states have call predecessors, (221), 159 states have call successors, (221) [2021-12-18 00:12:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 676 transitions. [2021-12-18 00:12:54,935 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 676 transitions. Word has length 153 [2021-12-18 00:12:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:54,935 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 676 transitions. [2021-12-18 00:12:54,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2021-12-18 00:12:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 676 transitions. [2021-12-18 00:12:54,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-18 00:12:54,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:54,937 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:12:54,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 00:12:54,938 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash 649329282, now seen corresponding path program 2 times [2021-12-18 00:12:54,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:54,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82786378] [2021-12-18 00:12:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:54,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:12:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:12:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:12:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:12:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:12:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:12:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-18 00:12:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 00:12:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-18 00:12:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-18 00:12:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-18 00:12:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 00:12:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 00:12:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-18 00:12:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 00:12:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-18 00:12:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-12-18 00:12:55,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:55,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82786378] [2021-12-18 00:12:55,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82786378] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:12:55,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528579035] [2021-12-18 00:12:55,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:12:55,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:55,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:12:55,338 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) [2021-12-18 00:12:55,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 00:12:56,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:12:56,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:12:56,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 2825 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 00:12:56,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:12:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-18 00:12:56,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:12:56,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528579035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:12:56,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:12:56,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-18 00:12:56,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967433684] [2021-12-18 00:12:56,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:12:56,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:12:56,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:12:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:12:56,374 INFO L87 Difference]: Start difference. First operand 450 states and 676 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-18 00:12:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:56,511 INFO L93 Difference]: Finished difference Result 768 states and 1162 transitions. [2021-12-18 00:12:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 00:12:56,512 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 154 [2021-12-18 00:12:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:56,514 INFO L225 Difference]: With dead ends: 768 [2021-12-18 00:12:56,514 INFO L226 Difference]: Without dead ends: 450 [2021-12-18 00:12:56,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-18 00:12:56,516 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 11 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:56,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1431 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:12:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-18 00:12:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 450. [2021-12-18 00:12:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 261 states have (on average 1.1302681992337165) internal successors, (295), 268 states have internal predecessors, (295), 160 states have call successors, (160), 23 states have call predecessors, (160), 28 states have return successors, (217), 158 states have call predecessors, (217), 159 states have call successors, (217) [2021-12-18 00:12:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 672 transitions. [2021-12-18 00:12:56,540 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 672 transitions. Word has length 154 [2021-12-18 00:12:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:56,540 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 672 transitions. [2021-12-18 00:12:56,540 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-18 00:12:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 672 transitions. [2021-12-18 00:12:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-18 00:12:56,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:56,542 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 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, 1, 1, 1, 1, 1, 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 00:12:56,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 00:12:56,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:56,772 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:56,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:56,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1759754407, now seen corresponding path program 1 times [2021-12-18 00:12:56,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:56,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286470374] [2021-12-18 00:12:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:56,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:12:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:12:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:12:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:12:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:12:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:12:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-18 00:12:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:56,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 00:12:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:57,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 00:12:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:57,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:12:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:57,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-18 00:12:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:57,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-18 00:12:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:57,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 00:12:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:57,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-18 00:12:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:57,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-18 00:12:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:57,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-18 00:12:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-12-18 00:12:57,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:57,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286470374] [2021-12-18 00:12:57,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286470374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:12:57,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346517150] [2021-12-18 00:12:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:57,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:57,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:12:57,084 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) [2021-12-18 00:12:57,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 00:12:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:57,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 2830 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 00:12:57,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:12:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-18 00:12:57,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:12:57,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346517150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:12:57,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:12:57,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2021-12-18 00:12:57,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708137506] [2021-12-18 00:12:57,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:12:57,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 00:12:57,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:12:57,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 00:12:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-18 00:12:57,759 INFO L87 Difference]: Start difference. First operand 450 states and 672 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-18 00:12:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:12:57,930 INFO L93 Difference]: Finished difference Result 876 states and 1339 transitions. [2021-12-18 00:12:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 00:12:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 156 [2021-12-18 00:12:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:12:57,933 INFO L225 Difference]: With dead ends: 876 [2021-12-18 00:12:57,933 INFO L226 Difference]: Without dead ends: 450 [2021-12-18 00:12:57,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-18 00:12:57,936 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 13 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:12:57,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 694 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2021-12-18 00:12:57,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-18 00:12:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 450. [2021-12-18 00:12:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 261 states have (on average 1.1264367816091954) internal successors, (294), 268 states have internal predecessors, (294), 160 states have call successors, (160), 23 states have call predecessors, (160), 28 states have return successors, (217), 158 states have call predecessors, (217), 159 states have call successors, (217) [2021-12-18 00:12:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 671 transitions. [2021-12-18 00:12:57,959 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 671 transitions. Word has length 156 [2021-12-18 00:12:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:12:57,959 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 671 transitions. [2021-12-18 00:12:57,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-18 00:12:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 671 transitions. [2021-12-18 00:12:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-18 00:12:57,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:12:57,961 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 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, 1, 1, 1, 1, 1, 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 00:12:57,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 00:12:58,182 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,SelfDestructingSolverStorable12 [2021-12-18 00:12:58,182 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:12:58,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:12:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1267128233, now seen corresponding path program 1 times [2021-12-18 00:12:58,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:12:58,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738682376] [2021-12-18 00:12:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:58,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:12:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:12:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:12:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:12:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:12:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:12:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:12:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:12:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:12:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:12:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:12:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-18 00:12:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 00:12:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 00:12:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:12:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-18 00:12:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-18 00:12:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 00:12:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-18 00:12:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-18 00:12:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-18 00:12:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-18 00:12:58,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:12:58,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738682376] [2021-12-18 00:12:58,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738682376] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:12:58,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072613137] [2021-12-18 00:12:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:12:58,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:12:58,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:12:58,842 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) [2021-12-18 00:12:58,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 00:12:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:12:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 2835 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-18 00:12:59,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:12:59,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 00:12:59,347 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 [2021-12-18 00:12:59,701 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 26 treesize of output 26 [2021-12-18 00:12:59,730 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 [2021-12-18 00:12:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 164 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-18 00:12:59,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:13:00,118 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1192 (Array Int Int))) (<= 0 (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#rhs~0#1.base| v_ArrVal_1192) |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#lhs~0#1.offset|))) (+ (* 18446744073709551616 (div (* .cse0 (- 1)) 18446744073709551616)) .cse0)))) is different from false [2021-12-18 00:13:00,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072613137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:13:00,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:13:00,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 24 [2021-12-18 00:13:00,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111777621] [2021-12-18 00:13:00,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:13:00,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 00:13:00,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:13:00,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 00:13:00,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=577, Unknown=1, NotChecked=48, Total=702 [2021-12-18 00:13:00,125 INFO L87 Difference]: Start difference. First operand 450 states and 671 transitions. Second operand has 24 states, 22 states have (on average 4.909090909090909) internal successors, (108), 21 states have internal predecessors, (108), 12 states have call successors, (46), 6 states have call predecessors, (46), 7 states have return successors, (44), 10 states have call predecessors, (44), 12 states have call successors, (44) [2021-12-18 00:13:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:13:01,815 INFO L93 Difference]: Finished difference Result 684 states and 1020 transitions. [2021-12-18 00:13:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 00:13:01,816 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 4.909090909090909) internal successors, (108), 21 states have internal predecessors, (108), 12 states have call successors, (46), 6 states have call predecessors, (46), 7 states have return successors, (44), 10 states have call predecessors, (44), 12 states have call successors, (44) Word has length 156 [2021-12-18 00:13:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:13:01,818 INFO L225 Difference]: With dead ends: 684 [2021-12-18 00:13:01,818 INFO L226 Difference]: Without dead ends: 489 [2021-12-18 00:13:01,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 288 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=230, Invalid=1579, Unknown=1, NotChecked=82, Total=1892 [2021-12-18 00:13:01,820 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 327 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:13:01,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 962 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 2075 Invalid, 0 Unknown, 256 Unchecked, 1.3s Time] [2021-12-18 00:13:01,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-18 00:13:01,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 471. [2021-12-18 00:13:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 273 states have (on average 1.1318681318681318) internal successors, (309), 280 states have internal predecessors, (309), 169 states have call successors, (169), 23 states have call predecessors, (169), 28 states have return successors, (225), 167 states have call predecessors, (225), 168 states have call successors, (225) [2021-12-18 00:13:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 703 transitions. [2021-12-18 00:13:01,844 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 703 transitions. Word has length 156 [2021-12-18 00:13:01,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:13:01,845 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 703 transitions. [2021-12-18 00:13:01,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 4.909090909090909) internal successors, (108), 21 states have internal predecessors, (108), 12 states have call successors, (46), 6 states have call predecessors, (46), 7 states have return successors, (44), 10 states have call predecessors, (44), 12 states have call successors, (44) [2021-12-18 00:13:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 703 transitions. [2021-12-18 00:13:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-18 00:13:01,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:13:01,848 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:13:01,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-18 00:13:02,063 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,SelfDestructingSolverStorable13 [2021-12-18 00:13:02,063 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:13:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:13:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1021216476, now seen corresponding path program 1 times [2021-12-18 00:13:02,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:13:02,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715486208] [2021-12-18 00:13:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:13:02,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:13:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:13:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:13:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:13:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:13:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:13:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:13:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:13:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:13:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:13:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:13:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 00:13:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-18 00:13:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 00:13:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-18 00:13:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-18 00:13:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:13:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-18 00:13:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 00:13:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:13:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-18 00:13:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:13:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-12-18 00:13:02,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:13:02,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715486208] [2021-12-18 00:13:02,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715486208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:13:02,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620852893] [2021-12-18 00:13:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:13:02,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:13:02,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:13:02,577 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) [2021-12-18 00:13:02,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 00:13:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 2798 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 00:13:03,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:13:03,082 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 [2021-12-18 00:13:03,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:13:03,435 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 00:13:03,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2021-12-18 00:13:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 93 proven. 22 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-18 00:13:04,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:13:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-12-18 00:13:05,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620852893] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:13:05,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:13:05,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 13] total 32 [2021-12-18 00:13:05,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110669500] [2021-12-18 00:13:05,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:13:05,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 00:13:05,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:13:05,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 00:13:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-12-18 00:13:05,337 INFO L87 Difference]: Start difference. First operand 471 states and 703 transitions. Second operand has 32 states, 31 states have (on average 4.0) internal successors, (124), 27 states have internal predecessors, (124), 11 states have call successors, (52), 10 states have call predecessors, (52), 7 states have return successors, (47), 10 states have call predecessors, (47), 10 states have call successors, (47) [2021-12-18 00:13:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:13:06,418 INFO L93 Difference]: Finished difference Result 1124 states and 1675 transitions. [2021-12-18 00:13:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 00:13:06,418 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.0) internal successors, (124), 27 states have internal predecessors, (124), 11 states have call successors, (52), 10 states have call predecessors, (52), 7 states have return successors, (47), 10 states have call predecessors, (47), 10 states have call successors, (47) Word has length 157 [2021-12-18 00:13:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:13:06,422 INFO L225 Difference]: With dead ends: 1124 [2021-12-18 00:13:06,422 INFO L226 Difference]: Without dead ends: 838 [2021-12-18 00:13:06,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 310 SyntacticMatches, 38 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 00:13:06,424 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 117 mSDsluCounter, 2899 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 3121 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 881 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 00:13:06,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 3121 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 948 Invalid, 0 Unknown, 881 Unchecked, 0.7s Time] [2021-12-18 00:13:06,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-12-18 00:13:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 785. [2021-12-18 00:13:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 457 states have (on average 1.113785557986871) internal successors, (509), 465 states have internal predecessors, (509), 286 states have call successors, (286), 35 states have call predecessors, (286), 41 states have return successors, (369), 284 states have call predecessors, (369), 285 states have call successors, (369) [2021-12-18 00:13:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1164 transitions. [2021-12-18 00:13:06,464 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1164 transitions. Word has length 157 [2021-12-18 00:13:06,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:13:06,464 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1164 transitions. [2021-12-18 00:13:06,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.0) internal successors, (124), 27 states have internal predecessors, (124), 11 states have call successors, (52), 10 states have call predecessors, (52), 7 states have return successors, (47), 10 states have call predecessors, (47), 10 states have call successors, (47) [2021-12-18 00:13:06,465 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1164 transitions. [2021-12-18 00:13:06,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-18 00:13:06,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:13:06,467 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:13:06,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 00:13:06,688 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,SelfDestructingSolverStorable14 [2021-12-18 00:13:06,688 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:13:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:13:06,689 INFO L85 PathProgramCache]: Analyzing trace with hash -398784330, now seen corresponding path program 1 times [2021-12-18 00:13:06,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:13:06,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612208735] [2021-12-18 00:13:06,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:13:06,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:13:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:06,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:13:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:06,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:13:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:13:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:13:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:13:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:13:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:13:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:13:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:13:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:13:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 00:13:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 00:13:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:13:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:13:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-18 00:13:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-18 00:13:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:13:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-18 00:13:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-18 00:13:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-18 00:13:07,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:13:07,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612208735] [2021-12-18 00:13:07,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612208735] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:13:07,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689580630] [2021-12-18 00:13:07,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:13:07,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:13:07,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:13:07,400 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) [2021-12-18 00:13:07,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 00:13:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:07,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 2810 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-18 00:13:07,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:13:08,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:13:08,249 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 00:13:08,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-18 00:13:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 172 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-18 00:13:09,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:13:09,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-18 00:13:09,650 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-18 00:13:09,650 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 20 treesize of output 19 [2021-12-18 00:13:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-12-18 00:13:09,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689580630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:13:09,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:13:09,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 13] total 41 [2021-12-18 00:13:09,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357050291] [2021-12-18 00:13:09,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:13:09,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 00:13:09,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:13:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 00:13:09,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 00:13:09,721 INFO L87 Difference]: Start difference. First operand 785 states and 1164 transitions. Second operand has 41 states, 37 states have (on average 4.135135135135135) internal successors, (153), 35 states have internal predecessors, (153), 15 states have call successors, (56), 11 states have call predecessors, (56), 10 states have return successors, (51), 11 states have call predecessors, (51), 15 states have call successors, (51) [2021-12-18 00:13:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:13:14,938 INFO L93 Difference]: Finished difference Result 1341 states and 1967 transitions. [2021-12-18 00:13:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-18 00:13:14,938 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 4.135135135135135) internal successors, (153), 35 states have internal predecessors, (153), 15 states have call successors, (56), 11 states have call predecessors, (56), 10 states have return successors, (51), 11 states have call predecessors, (51), 15 states have call successors, (51) Word has length 155 [2021-12-18 00:13:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:13:14,944 INFO L225 Difference]: With dead ends: 1341 [2021-12-18 00:13:14,944 INFO L226 Difference]: Without dead ends: 921 [2021-12-18 00:13:14,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 315 SyntacticMatches, 20 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=549, Invalid=5613, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 00:13:14,947 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 539 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 5306 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 7484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 5306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1508 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:13:14,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 1992 Invalid, 7484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 5306 Invalid, 0 Unknown, 1508 Unchecked, 3.2s Time] [2021-12-18 00:13:14,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-12-18 00:13:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 778. [2021-12-18 00:13:14,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 452 states have (on average 1.1238938053097345) internal successors, (508), 460 states have internal predecessors, (508), 282 states have call successors, (282), 37 states have call predecessors, (282), 43 states have return successors, (353), 280 states have call predecessors, (353), 281 states have call successors, (353) [2021-12-18 00:13:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1143 transitions. [2021-12-18 00:13:14,992 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1143 transitions. Word has length 155 [2021-12-18 00:13:14,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:13:14,993 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1143 transitions. [2021-12-18 00:13:14,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 4.135135135135135) internal successors, (153), 35 states have internal predecessors, (153), 15 states have call successors, (56), 11 states have call predecessors, (56), 10 states have return successors, (51), 11 states have call predecessors, (51), 15 states have call successors, (51) [2021-12-18 00:13:14,994 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1143 transitions. [2021-12-18 00:13:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-18 00:13:14,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:13:14,996 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:13:15,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 00:13:15,217 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,SelfDestructingSolverStorable15 [2021-12-18 00:13:15,217 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:13:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:13:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1573202911, now seen corresponding path program 2 times [2021-12-18 00:13:15,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:13:15,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057630442] [2021-12-18 00:13:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:13:15,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:13:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:13:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:13:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:13:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:13:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:13:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:13:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:13:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:13:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:13:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:13:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:13:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:13:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-18 00:13:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-18 00:13:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 00:13:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 00:13:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-18 00:13:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-18 00:13:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-18 00:13:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-18 00:13:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-12-18 00:13:15,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:13:15,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057630442] [2021-12-18 00:13:15,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057630442] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:13:15,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984935381] [2021-12-18 00:13:15,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:13:15,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:13:15,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:13:15,519 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) [2021-12-18 00:13:15,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 00:13:16,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:13:16,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:13:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 2847 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 00:13:16,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:13:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-18 00:13:16,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:13:16,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984935381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:13:16,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:13:16,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-18 00:13:16,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486077214] [2021-12-18 00:13:16,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:13:16,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:13:16,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:13:16,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:13:16,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:13:16,567 INFO L87 Difference]: Start difference. First operand 778 states and 1143 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-18 00:13:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:13:16,740 INFO L93 Difference]: Finished difference Result 1369 states and 2000 transitions. [2021-12-18 00:13:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 00:13:16,740 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 160 [2021-12-18 00:13:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:13:16,743 INFO L225 Difference]: With dead ends: 1369 [2021-12-18 00:13:16,743 INFO L226 Difference]: Without dead ends: 778 [2021-12-18 00:13:16,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-18 00:13:16,746 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 10 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:13:16,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1415 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:13:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-12-18 00:13:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2021-12-18 00:13:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 452 states have (on average 1.1238938053097345) internal successors, (508), 460 states have internal predecessors, (508), 282 states have call successors, (282), 37 states have call predecessors, (282), 43 states have return successors, (352), 280 states have call predecessors, (352), 281 states have call successors, (352) [2021-12-18 00:13:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1142 transitions. [2021-12-18 00:13:16,783 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1142 transitions. Word has length 160 [2021-12-18 00:13:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:13:16,783 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1142 transitions. [2021-12-18 00:13:16,783 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-18 00:13:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1142 transitions. [2021-12-18 00:13:16,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-18 00:13:16,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:13:16,785 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:13:16,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 00:13:17,006 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 [2021-12-18 00:13:17,006 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:13:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:13:17,007 INFO L85 PathProgramCache]: Analyzing trace with hash 942632218, now seen corresponding path program 3 times [2021-12-18 00:13:17,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:13:17,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088723565] [2021-12-18 00:13:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:13:17,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:13:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:13:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:13:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:13:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:13:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:13:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:13:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:13:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:13:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:13:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:13:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:13:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-18 00:13:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:13:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:17,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-18 00:13:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:18,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-18 00:13:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:18,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 00:13:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:18,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-18 00:13:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:18,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-18 00:13:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:18,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-18 00:13:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:18,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-18 00:13:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-18 00:13:18,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:13:18,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088723565] [2021-12-18 00:13:18,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088723565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:13:18,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73335867] [2021-12-18 00:13:18,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 00:13:18,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:13:18,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:13:18,027 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) [2021-12-18 00:13:18,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 00:13:19,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 00:13:19,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:13:19,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 2752 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 00:13:19,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:13:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 137 proven. 9 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-18 00:13:28,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:13:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 47 proven. 9 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-12-18 00:13:29,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73335867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:13:29,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:13:29,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 15] total 52 [2021-12-18 00:13:29,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141806797] [2021-12-18 00:13:29,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:13:29,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-18 00:13:29,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:13:29,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-18 00:13:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2486, Unknown=1, NotChecked=0, Total=2652 [2021-12-18 00:13:29,245 INFO L87 Difference]: Start difference. First operand 778 states and 1142 transitions. Second operand has 52 states, 47 states have (on average 3.1702127659574466) internal successors, (149), 45 states have internal predecessors, (149), 15 states have call successors, (67), 8 states have call predecessors, (67), 11 states have return successors, (62), 13 states have call predecessors, (62), 14 states have call successors, (62) [2021-12-18 00:13:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:13:42,607 INFO L93 Difference]: Finished difference Result 1186 states and 1707 transitions. [2021-12-18 00:13:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-18 00:13:42,609 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 47 states have (on average 3.1702127659574466) internal successors, (149), 45 states have internal predecessors, (149), 15 states have call successors, (67), 8 states have call predecessors, (67), 11 states have return successors, (62), 13 states have call predecessors, (62), 14 states have call successors, (62) Word has length 162 [2021-12-18 00:13:42,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:13:42,612 INFO L225 Difference]: With dead ends: 1186 [2021-12-18 00:13:42,612 INFO L226 Difference]: Without dead ends: 852 [2021-12-18 00:13:42,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 343 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=830, Invalid=8285, Unknown=5, NotChecked=0, Total=9120 [2021-12-18 00:13:42,615 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 354 mSDsluCounter, 2696 mSDsCounter, 0 mSdLazyCounter, 5499 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 7006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 5499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1220 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:13:42,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 2858 Invalid, 7006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 5499 Invalid, 0 Unknown, 1220 Unchecked, 3.2s Time] [2021-12-18 00:13:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-12-18 00:13:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 815. [2021-12-18 00:13:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 489 states have (on average 1.1206543967280163) internal successors, (548), 492 states have internal predecessors, (548), 278 states have call successors, (278), 46 states have call predecessors, (278), 47 states have return successors, (343), 276 states have call predecessors, (343), 277 states have call successors, (343) [2021-12-18 00:13:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1169 transitions. [2021-12-18 00:13:42,658 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1169 transitions. Word has length 162 [2021-12-18 00:13:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:13:42,658 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 1169 transitions. [2021-12-18 00:13:42,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 47 states have (on average 3.1702127659574466) internal successors, (149), 45 states have internal predecessors, (149), 15 states have call successors, (67), 8 states have call predecessors, (67), 11 states have return successors, (62), 13 states have call predecessors, (62), 14 states have call successors, (62) [2021-12-18 00:13:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1169 transitions. [2021-12-18 00:13:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-18 00:13:42,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:13:42,661 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:13:42,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 00:13:42,873 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 [2021-12-18 00:13:42,874 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:13:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:13:42,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1665943078, now seen corresponding path program 1 times [2021-12-18 00:13:42,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:13:42,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207379942] [2021-12-18 00:13:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:13:42,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:13:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:13:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:13:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:13:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:13:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:13:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:13:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:13:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:13:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:13:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:13:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 00:13:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:13:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-18 00:13:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:13:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-18 00:13:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-18 00:13:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 00:13:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:13:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 00:13:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:13:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:13:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-18 00:13:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-12-18 00:13:43,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:13:43,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207379942] [2021-12-18 00:13:43,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207379942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:13:43,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:13:43,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 00:13:43,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117607391] [2021-12-18 00:13:43,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:13:43,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:13:43,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:13:43,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:13:43,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:13:43,215 INFO L87 Difference]: Start difference. First operand 815 states and 1169 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-12-18 00:13:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:13:43,567 INFO L93 Difference]: Finished difference Result 1244 states and 1779 transitions. [2021-12-18 00:13:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:13:43,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 164 [2021-12-18 00:13:43,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:13:43,587 INFO L225 Difference]: With dead ends: 1244 [2021-12-18 00:13:43,587 INFO L226 Difference]: Without dead ends: 835 [2021-12-18 00:13:43,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:13:43,589 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 194 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:13:43,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 431 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 00:13:43,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-12-18 00:13:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 829. [2021-12-18 00:13:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 499 states have (on average 1.1182364729458918) internal successors, (558), 503 states have internal predecessors, (558), 278 states have call successors, (278), 46 states have call predecessors, (278), 51 states have return successors, (347), 279 states have call predecessors, (347), 277 states have call successors, (347) [2021-12-18 00:13:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1183 transitions. [2021-12-18 00:13:43,634 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1183 transitions. Word has length 164 [2021-12-18 00:13:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:13:43,634 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1183 transitions. [2021-12-18 00:13:43,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-12-18 00:13:43,634 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1183 transitions. [2021-12-18 00:13:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-18 00:13:43,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:13:43,636 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:13:43,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-18 00:13:43,636 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:13:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:13:43,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1049417710, now seen corresponding path program 1 times [2021-12-18 00:13:43,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:13:43,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870037737] [2021-12-18 00:13:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:13:43,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:13:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:13:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:13:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:13:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:13:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:13:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:13:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:13:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:13:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:13:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:13:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 00:13:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:13:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:13:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-18 00:13:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:13:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-18 00:13:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-18 00:13:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 00:13:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:13:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 00:13:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:13:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:13:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-18 00:13:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 13 proven. 66 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-18 00:13:44,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:13:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870037737] [2021-12-18 00:13:44,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870037737] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:13:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013599198] [2021-12-18 00:13:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:13:44,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:13:44,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:13:44,821 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) [2021-12-18 00:13:44,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 00:13:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:13:45,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 2817 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-18 00:13:45,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:13:45,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 00:13:45,495 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 00:13:46,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 00:13:46,558 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 00:13:46,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-18 00:13:46,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 20 treesize of output 8 [2021-12-18 00:13:49,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-12-18 00:13:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 19 proven. 134 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-18 00:13:49,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:14:03,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013599198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:14:03,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:14:03,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 59 [2021-12-18 00:14:03,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362164083] [2021-12-18 00:14:03,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:14:03,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-18 00:14:03,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:14:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-18 00:14:03,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=4366, Unknown=10, NotChecked=0, Total=4692 [2021-12-18 00:14:03,332 INFO L87 Difference]: Start difference. First operand 829 states and 1183 transitions. Second operand has 59 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 23 states have call successors, (52), 10 states have call predecessors, (52), 15 states have return successors, (50), 18 states have call predecessors, (50), 21 states have call successors, (50) [2021-12-18 00:14:17,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:14:17,465 INFO L93 Difference]: Finished difference Result 1128 states and 1580 transitions. [2021-12-18 00:14:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-18 00:14:17,466 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 23 states have call successors, (52), 10 states have call predecessors, (52), 15 states have return successors, (50), 18 states have call predecessors, (50), 21 states have call successors, (50) Word has length 165 [2021-12-18 00:14:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:14:17,470 INFO L225 Difference]: With dead ends: 1128 [2021-12-18 00:14:17,470 INFO L226 Difference]: Without dead ends: 1116 [2021-12-18 00:14:17,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 287 SyntacticMatches, 9 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4372 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=1038, Invalid=13465, Unknown=17, NotChecked=0, Total=14520 [2021-12-18 00:14:17,473 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 631 mSDsluCounter, 2902 mSDsCounter, 0 mSdLazyCounter, 6952 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 3110 SdHoareTripleChecker+Invalid, 9621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 6952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2047 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:14:17,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 3110 Invalid, 9621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 6952 Invalid, 0 Unknown, 2047 Unchecked, 4.2s Time] [2021-12-18 00:14:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-12-18 00:14:17,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1051. [2021-12-18 00:14:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 638 states have (on average 1.1128526645768024) internal successors, (710), 641 states have internal predecessors, (710), 341 states have call successors, (341), 67 states have call predecessors, (341), 71 states have return successors, (428), 342 states have call predecessors, (428), 339 states have call successors, (428) [2021-12-18 00:14:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1479 transitions. [2021-12-18 00:14:17,524 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1479 transitions. Word has length 165 [2021-12-18 00:14:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:14:17,524 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1479 transitions. [2021-12-18 00:14:17,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 23 states have call successors, (52), 10 states have call predecessors, (52), 15 states have return successors, (50), 18 states have call predecessors, (50), 21 states have call successors, (50) [2021-12-18 00:14:17,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1479 transitions. [2021-12-18 00:14:17,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-18 00:14:17,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:14:17,527 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:14:17,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-18 00:14:17,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:14:17,739 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:14:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:14:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash 463462035, now seen corresponding path program 1 times [2021-12-18 00:14:17,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:14:17,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734563481] [2021-12-18 00:14:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:14:17,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:14:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:14:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:14:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:14:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:14:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:14:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:14:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:14:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:14:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:14:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:14:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:14:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 00:14:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-18 00:14:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 00:14:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:14:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-18 00:14:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:14:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-18 00:14:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 00:14:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:17,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-18 00:14:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:18,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-18 00:14:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:18,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-18 00:14:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:18,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-18 00:14:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 26 proven. 21 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-12-18 00:14:18,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:14:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734563481] [2021-12-18 00:14:18,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734563481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:14:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816959133] [2021-12-18 00:14:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:14:18,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:14:18,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:14:18,016 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) [2021-12-18 00:14:18,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 00:14:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:18,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 2832 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 00:14:18,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:14:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-18 00:14:18,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:14:18,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816959133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:14:18,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:14:18,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-18 00:14:18,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254909237] [2021-12-18 00:14:18,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:14:18,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:14:18,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:14:18,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:14:18,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:14:18,711 INFO L87 Difference]: Start difference. First operand 1051 states and 1479 transitions. Second operand has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-12-18 00:14:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:14:18,871 INFO L93 Difference]: Finished difference Result 1533 states and 2144 transitions. [2021-12-18 00:14:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 00:14:18,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 167 [2021-12-18 00:14:18,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:14:18,876 INFO L225 Difference]: With dead ends: 1533 [2021-12-18 00:14:18,876 INFO L226 Difference]: Without dead ends: 946 [2021-12-18 00:14:18,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-18 00:14:18,880 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 10 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:14:18,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1411 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:14:18,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-12-18 00:14:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 930. [2021-12-18 00:14:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 561 states have (on average 1.1140819964349375) internal successors, (625), 563 states have internal predecessors, (625), 303 states have call successors, (303), 62 states have call predecessors, (303), 65 states have return successors, (369), 304 states have call predecessors, (369), 301 states have call successors, (369) [2021-12-18 00:14:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1297 transitions. [2021-12-18 00:14:18,956 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1297 transitions. Word has length 167 [2021-12-18 00:14:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:14:18,957 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1297 transitions. [2021-12-18 00:14:18,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-12-18 00:14:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1297 transitions. [2021-12-18 00:14:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-18 00:14:18,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:14:18,959 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:14:18,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-18 00:14:19,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:14:19,175 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:14:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:14:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash 902863674, now seen corresponding path program 2 times [2021-12-18 00:14:19,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:14:19,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496270354] [2021-12-18 00:14:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:14:19,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:14:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:14:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:14:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:14:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:14:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:14:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:14:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:14:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:14:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:14:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:14:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:14:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 00:14:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-18 00:14:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 00:14:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:14:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:14:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-18 00:14:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-18 00:14:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:14:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-18 00:14:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-18 00:14:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-18 00:14:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-18 00:14:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-12-18 00:14:19,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:14:19,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496270354] [2021-12-18 00:14:19,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496270354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:14:19,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211530253] [2021-12-18 00:14:19,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:14:19,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:14:19,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:14:19,692 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) [2021-12-18 00:14:19,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 00:14:20,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:14:20,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:14:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 2842 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-18 00:14:20,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:14:20,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 00:14:20,803 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 00:14:21,716 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 00:14:21,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-18 00:14:21,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 00:14:21,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 20 treesize of output 8 [2021-12-18 00:14:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-18 00:14:22,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:14:22,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211530253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:14:22,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:14:22,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [19] total 38 [2021-12-18 00:14:22,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559893182] [2021-12-18 00:14:22,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:14:22,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 00:14:22,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:14:22,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 00:14:22,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 00:14:22,121 INFO L87 Difference]: Start difference. First operand 930 states and 1297 transitions. Second operand has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 16 states have internal predecessors, (79), 7 states have call successors, (25), 5 states have call predecessors, (25), 7 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-12-18 00:14:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:14:23,083 INFO L93 Difference]: Finished difference Result 1257 states and 1732 transitions. [2021-12-18 00:14:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 00:14:23,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 16 states have internal predecessors, (79), 7 states have call successors, (25), 5 states have call predecessors, (25), 7 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 169 [2021-12-18 00:14:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:14:23,087 INFO L225 Difference]: With dead ends: 1257 [2021-12-18 00:14:23,087 INFO L226 Difference]: Without dead ends: 858 [2021-12-18 00:14:23,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 00:14:23,089 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 101 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 00:14:23,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 1006 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1038 Invalid, 0 Unknown, 381 Unchecked, 0.7s Time] [2021-12-18 00:14:23,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-12-18 00:14:23,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 855. [2021-12-18 00:14:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 523 states have (on average 1.1051625239005736) internal successors, (578), 528 states have internal predecessors, (578), 263 states have call successors, (263), 64 states have call predecessors, (263), 68 states have return successors, (320), 262 states have call predecessors, (320), 261 states have call successors, (320) [2021-12-18 00:14:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1161 transitions. [2021-12-18 00:14:23,130 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1161 transitions. Word has length 169 [2021-12-18 00:14:23,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:14:23,131 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1161 transitions. [2021-12-18 00:14:23,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 16 states have internal predecessors, (79), 7 states have call successors, (25), 5 states have call predecessors, (25), 7 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-12-18 00:14:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1161 transitions. [2021-12-18 00:14:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-18 00:14:23,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:14:23,136 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:14:23,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 00:14:23,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:14:23,350 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:14:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:14:23,350 INFO L85 PathProgramCache]: Analyzing trace with hash 906081946, now seen corresponding path program 1 times [2021-12-18 00:14:23,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:14:23,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137673338] [2021-12-18 00:14:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:14:23,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:14:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:14:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:14:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:14:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:14:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:14:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:14:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:14:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:14:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:14:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:14:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:14:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:14:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 00:14:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:14:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:14:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-18 00:14:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:14:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-18 00:14:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-18 00:14:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 00:14:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:14:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 00:14:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:14:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:14:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-18 00:14:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-18 00:14:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-18 00:14:23,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:14:23,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137673338] [2021-12-18 00:14:23,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137673338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:14:23,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:14:23,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 00:14:23,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621874493] [2021-12-18 00:14:23,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:14:23,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 00:14:23,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:14:23,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 00:14:23,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:14:23,690 INFO L87 Difference]: Start difference. First operand 855 states and 1161 transitions. Second operand has 11 states, 10 states have (on average 5.7) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-12-18 00:14:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:14:24,414 INFO L93 Difference]: Finished difference Result 925 states and 1265 transitions. [2021-12-18 00:14:24,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 00:14:24,415 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 172 [2021-12-18 00:14:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:14:24,418 INFO L225 Difference]: With dead ends: 925 [2021-12-18 00:14:24,418 INFO L226 Difference]: Without dead ends: 923 [2021-12-18 00:14:24,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-18 00:14:24,419 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 309 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:14:24,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 607 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 00:14:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-12-18 00:14:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 863. [2021-12-18 00:14:24,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 529 states have (on average 1.1039697542533082) internal successors, (584), 534 states have internal predecessors, (584), 263 states have call successors, (263), 66 states have call predecessors, (263), 70 states have return successors, (320), 262 states have call predecessors, (320), 261 states have call successors, (320) [2021-12-18 00:14:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1167 transitions. [2021-12-18 00:14:24,480 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1167 transitions. Word has length 172 [2021-12-18 00:14:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:14:24,480 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1167 transitions. [2021-12-18 00:14:24,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-12-18 00:14:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1167 transitions. [2021-12-18 00:14:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-18 00:14:24,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:14:24,483 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:14:24,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-18 00:14:24,484 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:14:24,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:14:24,484 INFO L85 PathProgramCache]: Analyzing trace with hash -174812420, now seen corresponding path program 1 times [2021-12-18 00:14:24,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:14:24,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065643865] [2021-12-18 00:14:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:14:24,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:14:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:24,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:14:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:24,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:14:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:24,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:14:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:24,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:14:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:24,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:14:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:24,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:14:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:14:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:14:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:14:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:14:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:14:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:14:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:14:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:14:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:14:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-18 00:14:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:14:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-18 00:14:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:14:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-18 00:14:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:14:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-18 00:14:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-18 00:14:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-18 00:14:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-18 00:14:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-12-18 00:14:25,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:14:25,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065643865] [2021-12-18 00:14:25,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065643865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:14:25,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351513047] [2021-12-18 00:14:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:14:25,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:14:25,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:14:25,368 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:14:25,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 00:14:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:14:25,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 2932 conjuncts, 124 conjunts are in the unsatisfiable core [2021-12-18 00:14:25,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:14:25,898 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 00:14:25,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 00:14:26,316 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 00:14:26,382 INFO L354 Elim1Store]: treesize reduction 60, result has 34.1 percent of original size [2021-12-18 00:14:26,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 51 [2021-12-18 00:14:28,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 00:14:28,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 61 treesize of output 31 [2021-12-18 00:14:28,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 00:14:28,579 INFO L354 Elim1Store]: treesize reduction 60, result has 26.8 percent of original size [2021-12-18 00:14:28,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-12-18 00:14:28,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 34 treesize of output 18 [2021-12-18 00:14:28,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-12-18 00:14:28,880 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 [2021-12-18 00:14:28,882 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 [2021-12-18 00:14:29,275 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:14:29,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2021-12-18 00:14:29,292 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:14:29,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 00:14:29,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-18 00:14:29,324 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 34 treesize of output 18 [2021-12-18 00:14:29,593 INFO L354 Elim1Store]: treesize reduction 8, result has 91.8 percent of original size [2021-12-18 00:14:29,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 87 treesize of output 159 [2021-12-18 00:14:29,920 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 [2021-12-18 00:14:29,923 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 [2021-12-18 00:14:29,940 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2161 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_2161))) (exists ((v_ArrVal_2162 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_2162)))) is different from true [2021-12-18 00:14:29,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2021-12-18 00:14:29,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 61 [2021-12-18 00:15:16,384 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_compare_lexical_~lhs#1.base_BEFORE_CALL_23| Int) (|v_aws_byte_cursor_compare_lexical_~rhs#1.base_BEFORE_CALL_34| Int)) (and (not (= |v_aws_byte_cursor_compare_lexical_~rhs#1.base_BEFORE_CALL_34| |v_aws_byte_cursor_compare_lexical_~lhs#1.base_BEFORE_CALL_23|)) (or (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_compare_lexical_~rhs#1.base_BEFORE_CALL_34|) 8))) (and (not (= 0 .cse0)) (not (= |v_aws_byte_cursor_compare_lexical_~lhs#1.base_BEFORE_CALL_23| .cse0)) (not (= |v_aws_byte_cursor_compare_lexical_~rhs#1.base_BEFORE_CALL_34| .cse0)))) (not (= 0 (mod (select (select |c_#memory_int| |v_aws_byte_cursor_compare_lexical_~lhs#1.base_BEFORE_CALL_23|) 0) 18446744073709551616)))))) is different from true [2021-12-18 00:15:46,167 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_compare_lexical_~lhs#1.base_BEFORE_CALL_25| Int) (|v_aws_byte_cursor_compare_lexical_~rhs#1.base_BEFORE_CALL_36| Int)) (and (not (= |v_aws_byte_cursor_compare_lexical_~rhs#1.base_BEFORE_CALL_36| |v_aws_byte_cursor_compare_lexical_~lhs#1.base_BEFORE_CALL_25|)) (or (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_compare_lexical_~rhs#1.base_BEFORE_CALL_36|) 8))) (and (not (= |v_aws_byte_cursor_compare_lexical_~lhs#1.base_BEFORE_CALL_25| .cse0)) (not (= |v_aws_byte_cursor_compare_lexical_~rhs#1.base_BEFORE_CALL_36| .cse0)) (not (= 0 .cse0)))) (not (= 0 (mod (select (select |c_#memory_int| |v_aws_byte_cursor_compare_lexical_~lhs#1.base_BEFORE_CALL_25|) 0) 18446744073709551616)))))) is different from true [2021-12-18 00:15:48,387 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_compare_lexical_~lhs#1.base_BEFORE_CALL_26| Int) (|v_aws_byte_cursor_compare_lexical_~rhs#1.base_BEFORE_CALL_37| Int)) (and (not (= |v_aws_byte_cursor_compare_lexical_~rhs#1.base_BEFORE_CALL_37| |v_aws_byte_cursor_compare_lexical_~lhs#1.base_BEFORE_CALL_26|)) (or (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_compare_lexical_~rhs#1.base_BEFORE_CALL_37|) 8))) (and (not (= |v_aws_byte_cursor_compare_lexical_~lhs#1.base_BEFORE_CALL_26| .cse0)) (not (= |v_aws_byte_cursor_compare_lexical_~rhs#1.base_BEFORE_CALL_37| .cse0)) (not (= 0 .cse0)))) (not (= 0 (mod (select (select |c_#memory_int| |v_aws_byte_cursor_compare_lexical_~lhs#1.base_BEFORE_CALL_26|) 0) 18446744073709551616)))))) is different from true [2021-12-18 00:17:09,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:17:09,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2021-12-18 00:17:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 92 proven. 127 refuted. 0 times theorem prover too weak. 33 trivial. 108 not checked. [2021-12-18 00:17:53,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:17:55,418 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2169 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#old_byte_from_rhs~0#1.base| v_ArrVal_2169) |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#rhs~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#rhs~0#1.offset| 8)) 0))) (forall ((v_ArrVal_2170 (Array Int Int))) (not (= 0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#old_byte_from_rhs~0#1.base| v_ArrVal_2170) |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#lhs~0#1.offset|) 18446744073709551616))))) is different from false [2021-12-18 00:17:55,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351513047] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:17:55,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:17:55,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 44] total 66 [2021-12-18 00:17:55,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412226510] [2021-12-18 00:17:55,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:17:55,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-18 00:17:55,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:17:55,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-18 00:17:55,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=4851, Unknown=85, NotChecked=730, Total=6006 [2021-12-18 00:17:55,422 INFO L87 Difference]: Start difference. First operand 863 states and 1167 transitions. Second operand has 66 states, 60 states have (on average 3.05) internal successors, (183), 55 states have internal predecessors, (183), 21 states have call successors, (51), 19 states have call predecessors, (51), 21 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) [2021-12-18 00:18:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:18:35,974 INFO L93 Difference]: Finished difference Result 1370 states and 1900 transitions. [2021-12-18 00:18:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-18 00:18:35,975 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 60 states have (on average 3.05) internal successors, (183), 55 states have internal predecessors, (183), 21 states have call successors, (51), 19 states have call predecessors, (51), 21 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) Word has length 183 [2021-12-18 00:18:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:18:35,979 INFO L225 Difference]: With dead ends: 1370 [2021-12-18 00:18:35,979 INFO L226 Difference]: Without dead ends: 1018 [2021-12-18 00:18:35,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 260 SyntacticMatches, 30 SemanticMatches, 115 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 4692 ImplicationChecksByTransitivity, 243.4s TimeCoverageRelationStatistics Valid=830, Invalid=11453, Unknown=169, NotChecked=1120, Total=13572 [2021-12-18 00:18:35,983 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 296 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 3450 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1736 SdHoareTripleChecker+Invalid, 6333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 3450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2540 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:18:35,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1736 Invalid, 6333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 3450 Invalid, 0 Unknown, 2540 Unchecked, 2.3s Time] [2021-12-18 00:18:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-12-18 00:18:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 934. [2021-12-18 00:18:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 571 states have (on average 1.106830122591944) internal successors, (632), 576 states have internal predecessors, (632), 286 states have call successors, (286), 72 states have call predecessors, (286), 76 states have return successors, (337), 285 states have call predecessors, (337), 284 states have call successors, (337) [2021-12-18 00:18:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1255 transitions. [2021-12-18 00:18:36,033 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1255 transitions. Word has length 183 [2021-12-18 00:18:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:18:36,033 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1255 transitions. [2021-12-18 00:18:36,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 60 states have (on average 3.05) internal successors, (183), 55 states have internal predecessors, (183), 21 states have call successors, (51), 19 states have call predecessors, (51), 21 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) [2021-12-18 00:18:36,033 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1255 transitions. [2021-12-18 00:18:36,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-18 00:18:36,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:18:36,035 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:18:36,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 00:18:36,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:18:36,247 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:18:36,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:18:36,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2109887325, now seen corresponding path program 1 times [2021-12-18 00:18:36,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:18:36,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324439814] [2021-12-18 00:18:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:18:36,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:18:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:18:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:18:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:18:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:18:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:18:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:18:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:18:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:18:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:18:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:18:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:18:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:18:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 00:18:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:18:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:18:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-18 00:18:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:18:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-18 00:18:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-18 00:18:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 00:18:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:18:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 00:18:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:18:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:18:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-18 00:18:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-18 00:18:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-18 00:18:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-18 00:18:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-18 00:18:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-12-18 00:18:36,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:18:36,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324439814] [2021-12-18 00:18:36,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324439814] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:18:36,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421223610] [2021-12-18 00:18:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:18:36,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:18:36,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:18:36,768 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:18:36,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 00:18:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:37,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-18 00:18:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:18:38,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-12-18 00:18:38,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 00:18:38,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 00:18:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 48 proven. 139 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-18 00:18:38,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:18:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2021-12-18 00:18:42,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421223610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:18:42,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:18:42,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2021-12-18 00:18:42,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717053198] [2021-12-18 00:18:42,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:18:42,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 00:18:42,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:18:42,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 00:18:42,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-12-18 00:18:42,220 INFO L87 Difference]: Start difference. First operand 934 states and 1255 transitions. Second operand has 29 states, 25 states have (on average 6.0) internal successors, (150), 25 states have internal predecessors, (150), 14 states have call successors, (71), 10 states have call predecessors, (71), 9 states have return successors, (69), 10 states have call predecessors, (69), 14 states have call successors, (69) [2021-12-18 00:18:44,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:18:44,820 INFO L93 Difference]: Finished difference Result 1901 states and 2561 transitions. [2021-12-18 00:18:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 00:18:44,821 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 6.0) internal successors, (150), 25 states have internal predecessors, (150), 14 states have call successors, (71), 10 states have call predecessors, (71), 9 states have return successors, (69), 10 states have call predecessors, (69), 14 states have call successors, (69) Word has length 189 [2021-12-18 00:18:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:18:44,842 INFO L225 Difference]: With dead ends: 1901 [2021-12-18 00:18:44,842 INFO L226 Difference]: Without dead ends: 1466 [2021-12-18 00:18:44,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 420 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=321, Invalid=2229, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 00:18:44,844 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 465 mSDsluCounter, 1676 mSDsCounter, 0 mSdLazyCounter, 2945 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 4592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 2945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1255 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 00:18:44,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 1895 Invalid, 4592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 2945 Invalid, 0 Unknown, 1255 Unchecked, 1.8s Time] [2021-12-18 00:18:44,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-12-18 00:18:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1338. [2021-12-18 00:18:44,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 832 states have (on average 1.1069711538461537) internal successors, (921), 844 states have internal predecessors, (921), 383 states have call successors, (383), 118 states have call predecessors, (383), 122 states have return successors, (470), 375 states have call predecessors, (470), 380 states have call successors, (470) [2021-12-18 00:18:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 1774 transitions. [2021-12-18 00:18:44,909 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 1774 transitions. Word has length 189 [2021-12-18 00:18:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:18:44,909 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 1774 transitions. [2021-12-18 00:18:44,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 6.0) internal successors, (150), 25 states have internal predecessors, (150), 14 states have call successors, (71), 10 states have call predecessors, (71), 9 states have return successors, (69), 10 states have call predecessors, (69), 14 states have call successors, (69) [2021-12-18 00:18:44,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 1774 transitions. [2021-12-18 00:18:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-18 00:18:44,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:18:44,913 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:18:44,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 00:18:45,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-18 00:18:45,134 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:18:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:18:45,134 INFO L85 PathProgramCache]: Analyzing trace with hash -98594468, now seen corresponding path program 1 times [2021-12-18 00:18:45,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:18:45,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710613406] [2021-12-18 00:18:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:18:45,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:18:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:45,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:18:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:45,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:18:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:45,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:18:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:45,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:18:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:45,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:18:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:45,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:18:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:45,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:18:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:45,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:18:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:45,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:18:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:45,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:18:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:45,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:18:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:18:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:18:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:18:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:18:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:18:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-18 00:18:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:18:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-18 00:18:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-18 00:18:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-18 00:18:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-18 00:18:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-18 00:18:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-18 00:18:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-18 00:18:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-18 00:18:46,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:18:46,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710613406] [2021-12-18 00:18:46,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710613406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:18:46,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:18:46,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-18 00:18:46,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909419261] [2021-12-18 00:18:46,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:18:46,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 00:18:46,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:18:46,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 00:18:46,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-12-18 00:18:46,141 INFO L87 Difference]: Start difference. First operand 1338 states and 1774 transitions. Second operand has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 16 states have internal predecessors, (58), 9 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (24), 9 states have call predecessors, (24), 8 states have call successors, (24) [2021-12-18 00:18:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:18:48,878 INFO L93 Difference]: Finished difference Result 1680 states and 2231 transitions. [2021-12-18 00:18:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 00:18:48,878 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 16 states have internal predecessors, (58), 9 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (24), 9 states have call predecessors, (24), 8 states have call successors, (24) Word has length 195 [2021-12-18 00:18:48,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:18:48,883 INFO L225 Difference]: With dead ends: 1680 [2021-12-18 00:18:48,883 INFO L226 Difference]: Without dead ends: 1357 [2021-12-18 00:18:48,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-12-18 00:18:48,885 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 502 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:18:48,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 481 Invalid, 2740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-18 00:18:48,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-12-18 00:18:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1314. [2021-12-18 00:18:48,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 820 states have (on average 1.103658536585366) internal successors, (905), 828 states have internal predecessors, (905), 371 states have call successors, (371), 118 states have call predecessors, (371), 122 states have return successors, (458), 367 states have call predecessors, (458), 368 states have call successors, (458) [2021-12-18 00:18:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1734 transitions. [2021-12-18 00:18:48,979 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1734 transitions. Word has length 195 [2021-12-18 00:18:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:18:48,979 INFO L470 AbstractCegarLoop]: Abstraction has 1314 states and 1734 transitions. [2021-12-18 00:18:48,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 16 states have internal predecessors, (58), 9 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (24), 9 states have call predecessors, (24), 8 states have call successors, (24) [2021-12-18 00:18:48,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1734 transitions. [2021-12-18 00:18:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-18 00:18:48,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:18:48,982 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:18:48,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-18 00:18:48,983 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:18:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:18:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash -579674726, now seen corresponding path program 1 times [2021-12-18 00:18:48,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:18:48,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764616051] [2021-12-18 00:18:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:18:48,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:18:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:18:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:18:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:18:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:18:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:18:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:18:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:18:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:18:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:18:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:18:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:18:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:18:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:49,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:18:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:18:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:18:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:18:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-18 00:18:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:18:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-18 00:18:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-18 00:18:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-18 00:18:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-18 00:18:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-18 00:18:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-18 00:18:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-18 00:18:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-12-18 00:18:50,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:18:50,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764616051] [2021-12-18 00:18:50,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764616051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:18:50,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:18:50,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-12-18 00:18:50,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864872892] [2021-12-18 00:18:50,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:18:50,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 00:18:50,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:18:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 00:18:50,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-12-18 00:18:50,277 INFO L87 Difference]: Start difference. First operand 1314 states and 1734 transitions. Second operand has 23 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 10 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-12-18 00:18:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:18:53,146 INFO L93 Difference]: Finished difference Result 1728 states and 2300 transitions. [2021-12-18 00:18:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 00:18:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 10 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 195 [2021-12-18 00:18:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:18:53,152 INFO L225 Difference]: With dead ends: 1728 [2021-12-18 00:18:53,152 INFO L226 Difference]: Without dead ends: 1454 [2021-12-18 00:18:53,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 00:18:53,154 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 330 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 3260 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 3562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 3260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:18:53,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 941 Invalid, 3562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 3260 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-18 00:18:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-12-18 00:18:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1436. [2021-12-18 00:18:53,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 883 states have (on average 1.1053227633069083) internal successors, (976), 893 states have internal predecessors, (976), 428 states have call successors, (428), 119 states have call predecessors, (428), 124 states have return successors, (523), 423 states have call predecessors, (523), 425 states have call successors, (523) [2021-12-18 00:18:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 1927 transitions. [2021-12-18 00:18:53,235 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 1927 transitions. Word has length 195 [2021-12-18 00:18:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:18:53,236 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 1927 transitions. [2021-12-18 00:18:53,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 10 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-12-18 00:18:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 1927 transitions. [2021-12-18 00:18:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-18 00:18:53,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:18:53,240 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:18:53,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-18 00:18:53,240 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:18:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:18:53,241 INFO L85 PathProgramCache]: Analyzing trace with hash -980419587, now seen corresponding path program 1 times [2021-12-18 00:18:53,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:18:53,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112454457] [2021-12-18 00:18:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:18:53,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:18:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:18:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:18:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:18:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:18:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:18:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:18:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:18:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:18:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:18:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:18:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:18:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:18:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:18:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:18:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-18 00:18:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:18:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-18 00:18:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-18 00:18:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-18 00:18:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-18 00:18:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:18:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-18 00:18:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:18:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:53,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-18 00:18:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:54,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-18 00:18:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:54,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-18 00:18:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:54,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 00:18:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2021-12-18 00:18:54,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:18:54,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112454457] [2021-12-18 00:18:54,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112454457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:18:54,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887479978] [2021-12-18 00:18:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:18:54,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:18:54,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:18:54,115 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:18:54,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 00:18:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:18:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 2973 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 00:18:54,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:18:54,655 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:18:54,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:18:54,936 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 00:18:54,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 00:18:55,295 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 00:18:55,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 00:18:55,397 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 00:18:55,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 00:18:55,574 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 [2021-12-18 00:18:55,593 WARN L860 $PredicateComparison]: unable to prove that (and (< 0 (mod |c_save_byte_from_array_#in~size#1| 18446744073709551616)) (exists ((v_ArrVal_2652 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_2652)))) is different from true [2021-12-18 00:18:55,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 00:19:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 115 proven. 173 refuted. 0 times theorem prover too weak. 80 trivial. 2 not checked. [2021-12-18 00:19:05,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:19:06,397 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2656 (Array Int Int))) (not (= 0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#old_byte_from_rhs~0#1.base| v_ArrVal_2656) |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#rhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#rhs~0#1.offset|) 18446744073709551616)))) (<= (mod |c_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_#t~mem1225#1| 18446744073709551616) 0)) is different from false [2021-12-18 00:19:06,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887479978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:19:06,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:19:06,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 36 [2021-12-18 00:19:06,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880686483] [2021-12-18 00:19:06,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:19:06,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 00:19:06,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:19:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 00:19:06,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1361, Unknown=5, NotChecked=150, Total=1640 [2021-12-18 00:19:06,400 INFO L87 Difference]: Start difference. First operand 1436 states and 1927 transitions. Second operand has 36 states, 33 states have (on average 5.424242424242424) internal successors, (179), 31 states have internal predecessors, (179), 15 states have call successors, (54), 10 states have call predecessors, (54), 11 states have return successors, (53), 14 states have call predecessors, (53), 15 states have call successors, (53) [2021-12-18 00:19:19,349 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#rhs~0#1.base_BEFORE_CALL_68| Int)) (= (select |c_#valid| |v_ULTIMATE.start_aws_byte_cursor_compare_lexical_harness_~#rhs~0#1.base_BEFORE_CALL_68|) 1)) (< 0 (mod |c_save_byte_from_array_#in~size#1| 18446744073709551616)) (exists ((v_ArrVal_2652 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_2652)))) is different from true [2021-12-18 00:19:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:19:33,978 INFO L93 Difference]: Finished difference Result 2339 states and 3211 transitions. [2021-12-18 00:19:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-18 00:19:33,979 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 5.424242424242424) internal successors, (179), 31 states have internal predecessors, (179), 15 states have call successors, (54), 10 states have call predecessors, (54), 11 states have return successors, (53), 14 states have call predecessors, (53), 15 states have call successors, (53) Word has length 197 [2021-12-18 00:19:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:19:33,985 INFO L225 Difference]: With dead ends: 2339 [2021-12-18 00:19:33,985 INFO L226 Difference]: Without dead ends: 1731 [2021-12-18 00:19:33,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 314 SyntacticMatches, 35 SemanticMatches, 87 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=608, Invalid=6696, Unknown=18, NotChecked=510, Total=7832 [2021-12-18 00:19:33,988 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 486 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 3043 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 6109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 3043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2557 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-18 00:19:33,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 1472 Invalid, 6109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 3043 Invalid, 0 Unknown, 2557 Unchecked, 2.9s Time] [2021-12-18 00:19:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-12-18 00:19:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1531. [2021-12-18 00:19:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 955 states have (on average 1.1047120418848169) internal successors, (1055), 964 states have internal predecessors, (1055), 436 states have call successors, (436), 130 states have call predecessors, (436), 139 states have return successors, (529), 436 states have call predecessors, (529), 433 states have call successors, (529) [2021-12-18 00:19:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 2020 transitions. [2021-12-18 00:19:34,080 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 2020 transitions. Word has length 197 [2021-12-18 00:19:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:19:34,080 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 2020 transitions. [2021-12-18 00:19:34,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 5.424242424242424) internal successors, (179), 31 states have internal predecessors, (179), 15 states have call successors, (54), 10 states have call predecessors, (54), 11 states have return successors, (53), 14 states have call predecessors, (53), 15 states have call successors, (53) [2021-12-18 00:19:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 2020 transitions. [2021-12-18 00:19:34,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-18 00:19:34,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:19:34,085 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:19:34,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 00:19:34,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 00:19:34,307 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:19:34,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:19:34,307 INFO L85 PathProgramCache]: Analyzing trace with hash 400318273, now seen corresponding path program 1 times [2021-12-18 00:19:34,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:19:34,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914664876] [2021-12-18 00:19:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:19:34,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:19:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:19:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:19:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:19:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:19:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:19:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:19:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:19:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:19:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:19:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:19:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:19:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:19:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:19:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:19:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:19:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:19:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-18 00:19:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:19:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-18 00:19:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-18 00:19:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-18 00:19:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-18 00:19:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-18 00:19:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-18 00:19:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-18 00:19:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-12-18 00:19:34,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:19:34,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914664876] [2021-12-18 00:19:34,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914664876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:19:34,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:19:34,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-18 00:19:34,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993121360] [2021-12-18 00:19:34,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:19:34,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 00:19:34,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:19:34,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 00:19:34,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-18 00:19:34,677 INFO L87 Difference]: Start difference. First operand 1531 states and 2020 transitions. Second operand has 16 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2021-12-18 00:19:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:19:35,952 INFO L93 Difference]: Finished difference Result 1549 states and 2041 transitions. [2021-12-18 00:19:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 00:19:35,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) Word has length 197 [2021-12-18 00:19:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:19:35,958 INFO L225 Difference]: With dead ends: 1549 [2021-12-18 00:19:35,958 INFO L226 Difference]: Without dead ends: 1547 [2021-12-18 00:19:35,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-12-18 00:19:35,963 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 99 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 00:19:35,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1339 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-18 00:19:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-12-18 00:19:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1538. [2021-12-18 00:19:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 958 states have (on average 1.104384133611691) internal successors, (1058), 967 states have internal predecessors, (1058), 439 states have call successors, (439), 131 states have call predecessors, (439), 140 states have return successors, (532), 439 states have call predecessors, (532), 436 states have call successors, (532) [2021-12-18 00:19:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2029 transitions. [2021-12-18 00:19:36,060 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2029 transitions. Word has length 197 [2021-12-18 00:19:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:19:36,061 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 2029 transitions. [2021-12-18 00:19:36,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2021-12-18 00:19:36,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2029 transitions. [2021-12-18 00:19:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-18 00:19:36,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:19:36,065 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 6, 6, 6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:19:36,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-18 00:19:36,065 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:19:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:19:36,066 INFO L85 PathProgramCache]: Analyzing trace with hash 905200376, now seen corresponding path program 1 times [2021-12-18 00:19:36,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:19:36,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195966529] [2021-12-18 00:19:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:19:36,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:19:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:19:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:19:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:19:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:19:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:19:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:19:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:19:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:19:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:19:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:19:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-18 00:19:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:19:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-18 00:19:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:19:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:19:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-18 00:19:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-18 00:19:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 00:19:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-18 00:19:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:36,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:19:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:19:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:19:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-18 00:19:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:19:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-18 00:19:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-18 00:19:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 00:19:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:19:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 00:19:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:19:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:19:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-18 00:19:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 52 proven. 21 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2021-12-18 00:19:37,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:19:37,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195966529] [2021-12-18 00:19:37,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195966529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:19:37,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167568600] [2021-12-18 00:19:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:19:37,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:19:37,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:19:37,235 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:19:37,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 00:19:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 2913 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 00:19:37,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:19:38,060 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 [2021-12-18 00:19:38,064 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 [2021-12-18 00:19:38,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 00:19:38,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 00:19:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 267 proven. 17 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-18 00:19:38,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:19:39,086 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 38 treesize of output 32 [2021-12-18 00:19:39,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:19:39,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:19:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-12-18 00:19:39,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167568600] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:19:39,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:19:39,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15, 11] total 43 [2021-12-18 00:19:39,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253214264] [2021-12-18 00:19:39,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:19:39,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 00:19:39,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:19:39,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 00:19:39,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1699, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 00:19:39,266 INFO L87 Difference]: Start difference. First operand 1538 states and 2029 transitions. Second operand has 43 states, 38 states have (on average 4.131578947368421) internal successors, (157), 35 states have internal predecessors, (157), 16 states have call successors, (83), 8 states have call predecessors, (83), 11 states have return successors, (79), 13 states have call predecessors, (79), 15 states have call successors, (79) [2021-12-18 00:19:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:19:45,586 INFO L93 Difference]: Finished difference Result 2469 states and 3280 transitions. [2021-12-18 00:19:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-18 00:19:45,586 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 4.131578947368421) internal successors, (157), 35 states have internal predecessors, (157), 16 states have call successors, (83), 8 states have call predecessors, (83), 11 states have return successors, (79), 13 states have call predecessors, (79), 15 states have call successors, (79) Word has length 205 [2021-12-18 00:19:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:19:45,592 INFO L225 Difference]: With dead ends: 2469 [2021-12-18 00:19:45,592 INFO L226 Difference]: Without dead ends: 1591 [2021-12-18 00:19:45,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 454 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1799 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=570, Invalid=7440, Unknown=0, NotChecked=0, Total=8010 [2021-12-18 00:19:45,596 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 423 mSDsluCounter, 2810 mSDsCounter, 0 mSdLazyCounter, 6443 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 7469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 6443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 630 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:19:45,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 2987 Invalid, 7469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 6443 Invalid, 0 Unknown, 630 Unchecked, 4.3s Time] [2021-12-18 00:19:45,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-12-18 00:19:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1432. [2021-12-18 00:19:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 891 states have (on average 1.1077441077441077) internal successors, (987), 899 states have internal predecessors, (987), 411 states have call successors, (411), 122 states have call predecessors, (411), 129 states have return successors, (496), 410 states have call predecessors, (496), 408 states have call successors, (496) [2021-12-18 00:19:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1894 transitions. [2021-12-18 00:19:45,684 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1894 transitions. Word has length 205 [2021-12-18 00:19:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:19:45,684 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 1894 transitions. [2021-12-18 00:19:45,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 4.131578947368421) internal successors, (157), 35 states have internal predecessors, (157), 16 states have call successors, (83), 8 states have call predecessors, (83), 11 states have return successors, (79), 13 states have call predecessors, (79), 15 states have call successors, (79) [2021-12-18 00:19:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1894 transitions. [2021-12-18 00:19:45,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-18 00:19:45,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:19:45,687 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:19:45,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 00:19:45,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:19:45,908 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:19:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:19:45,908 INFO L85 PathProgramCache]: Analyzing trace with hash 322277548, now seen corresponding path program 2 times [2021-12-18 00:19:45,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:19:45,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124622614] [2021-12-18 00:19:45,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:19:45,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:19:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:19:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:19:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:19:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:19:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:19:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:19:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:19:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:19:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:19:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:19:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:19:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:19:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:19:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:19:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-18 00:19:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:19:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-18 00:19:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-18 00:19:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-18 00:19:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:19:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:19:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 00:19:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-18 00:19:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 00:19:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-18 00:19:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 00:19:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-18 00:19:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:19:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 46 proven. 17 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 00:19:46,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:19:46,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124622614] [2021-12-18 00:19:46,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124622614] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:19:46,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337738621] [2021-12-18 00:19:46,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:19:46,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:19:46,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:19:46,478 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:19:46,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 00:19:47,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:19:47,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:19:47,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 2995 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-18 00:19:47,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:19:47,364 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:19:47,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:19:47,574 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 00:19:47,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 00:19:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:19:54,188 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 00:19:54,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-18 00:19:54,252 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 00:19:54,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 00:19:54,373 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 [2021-12-18 00:19:54,387 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3032 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_3032))) is different from true [2021-12-18 00:19:54,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 00:19:54,438 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3033 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_~storage#1.base| v_ArrVal_3033))) is different from true [2021-12-18 00:19:54,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-18 00:19:54,450 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3034 (Array Int Int)) (|save_byte_from_array_~storage#1.base| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| v_ArrVal_3034))) is different from true [2021-12-18 00:19:54,466 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:19:54,466 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 [2021-12-18 00:19:54,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-18 00:20:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 147 proven. 164 refuted. 0 times theorem prover too weak. 73 trivial. 4 not checked. [2021-12-18 00:20:28,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:20:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-18 00:20:28,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337738621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:20:28,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:20:28,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 30, 9] total 41 [2021-12-18 00:20:28,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236122236] [2021-12-18 00:20:28,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:20:28,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 00:20:28,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:20:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 00:20:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1258, Unknown=7, NotChecked=222, Total=1640 [2021-12-18 00:20:28,738 INFO L87 Difference]: Start difference. First operand 1432 states and 1894 transitions. Second operand has 41 states, 40 states have (on average 4.45) internal successors, (178), 38 states have internal predecessors, (178), 13 states have call successors, (58), 10 states have call predecessors, (58), 12 states have return successors, (53), 13 states have call predecessors, (53), 13 states have call successors, (53) [2021-12-18 00:20:49,737 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3032 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_3032))) (exists ((v_ArrVal_3034 (Array Int Int)) (|save_byte_from_array_~storage#1.base| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| v_ArrVal_3034)))) is different from true [2021-12-18 00:20:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:20:56,365 INFO L93 Difference]: Finished difference Result 1897 states and 2495 transitions. [2021-12-18 00:20:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 00:20:56,366 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.45) internal successors, (178), 38 states have internal predecessors, (178), 13 states have call successors, (58), 10 states have call predecessors, (58), 12 states have return successors, (53), 13 states have call predecessors, (53), 13 states have call successors, (53) Word has length 203 [2021-12-18 00:20:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:20:56,372 INFO L225 Difference]: With dead ends: 1897 [2021-12-18 00:20:56,372 INFO L226 Difference]: Without dead ends: 1616 [2021-12-18 00:20:56,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 408 SyntacticMatches, 33 SemanticMatches, 62 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 65.0s TimeCoverageRelationStatistics Valid=399, Invalid=3138, Unknown=19, NotChecked=476, Total=4032 [2021-12-18 00:20:56,374 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 382 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 5578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2306 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:20:56,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1672 Invalid, 5578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 2955 Invalid, 0 Unknown, 2306 Unchecked, 2.5s Time] [2021-12-18 00:20:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-12-18 00:20:56,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1515. [2021-12-18 00:20:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 954 states have (on average 1.1069182389937107) internal successors, (1056), 958 states have internal predecessors, (1056), 420 states have call successors, (420), 136 states have call predecessors, (420), 140 states have return successors, (508), 420 states have call predecessors, (508), 417 states have call successors, (508) [2021-12-18 00:20:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 1984 transitions. [2021-12-18 00:20:56,525 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 1984 transitions. Word has length 203 [2021-12-18 00:20:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:20:56,525 INFO L470 AbstractCegarLoop]: Abstraction has 1515 states and 1984 transitions. [2021-12-18 00:20:56,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.45) internal successors, (178), 38 states have internal predecessors, (178), 13 states have call successors, (58), 10 states have call predecessors, (58), 12 states have return successors, (53), 13 states have call predecessors, (53), 13 states have call successors, (53) [2021-12-18 00:20:56,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 1984 transitions. [2021-12-18 00:20:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-18 00:20:56,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:20:56,529 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:20:56,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-18 00:20:56,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:20:56,750 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:20:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:20:56,751 INFO L85 PathProgramCache]: Analyzing trace with hash 819400485, now seen corresponding path program 1 times [2021-12-18 00:20:56,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:20:56,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442947443] [2021-12-18 00:20:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:20:56,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:20:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:20:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:20:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:20:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:20:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:20:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:20:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:20:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:20:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 00:20:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:20:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-18 00:20:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-18 00:20:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-18 00:20:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:20:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:20:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:20:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-18 00:20:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-18 00:20:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-18 00:20:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-18 00:20:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:20:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-18 00:20:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-18 00:20:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-18 00:20:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-18 00:20:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-18 00:20:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-18 00:20:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-18 00:20:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-18 00:20:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-18 00:20:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-18 00:20:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-12-18 00:20:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-12-18 00:20:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 47 proven. 46 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-12-18 00:20:57,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:20:57,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442947443] [2021-12-18 00:20:57,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442947443] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:20:57,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401113804] [2021-12-18 00:20:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:20:57,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:20:57,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:20:57,790 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:20:57,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 00:20:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:20:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 3020 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-18 00:20:58,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:20:58,369 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 00:20:58,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 00:20:59,895 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 2132941 column 46: unknown constant v_#valid_BEFORE_CALL_18 [2021-12-18 00:20:59,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:20:59,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-12-18 00:20:59,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107017419] [2021-12-18 00:20:59,895 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 00:20:59,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 00:20:59,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:20:59,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 00:20:59,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 00:20:59,896 INFO L87 Difference]: Start difference. First operand 1515 states and 1984 transitions. Second operand has 31 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 26 states have internal predecessors, (85), 10 states have call successors, (32), 6 states have call predecessors, (32), 9 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) [2021-12-18 00:20:59,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 00:20:59,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 00:20:59,897 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 [2021-12-18 00:20:59,897 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] [2021-12-18 00:20:59,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 00:21:00,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:21:00,098 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.modelcheckerutils.smt.MonolithicImplicationChecker@38374301 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) [2021-12-18 00:21:00,100 INFO L158 Benchmark]: Toolchain (without parser) took 511369.25ms. Allocated memory was 115.3MB in the beginning and 671.1MB in the end (delta: 555.7MB). Free memory was 73.3MB in the beginning and 486.8MB in the end (delta: -413.5MB). Peak memory consumption was 144.6MB. Max. memory is 16.1GB. [2021-12-18 00:21:00,101 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 79.7MB. Free memory was 37.7MB in the beginning and 37.7MB in the end (delta: 65.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 00:21:00,101 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1643.09ms. Allocated memory was 115.3MB in the beginning and 172.0MB in the end (delta: 56.6MB). Free memory was 73.1MB in the beginning and 99.5MB in the end (delta: -26.5MB). Peak memory consumption was 60.6MB. Max. memory is 16.1GB. [2021-12-18 00:21:00,101 INFO L158 Benchmark]: Boogie Procedure Inliner took 177.23ms. Allocated memory is still 172.0MB. Free memory was 99.5MB in the beginning and 88.0MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-18 00:21:00,101 INFO L158 Benchmark]: Boogie Preprocessor took 78.61ms. Allocated memory is still 172.0MB. Free memory was 88.0MB in the beginning and 80.8MB in the end (delta: 7.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-18 00:21:00,101 INFO L158 Benchmark]: RCFGBuilder took 856.50ms. Allocated memory was 172.0MB in the beginning and 222.3MB in the end (delta: 50.3MB). Free memory was 80.8MB in the beginning and 130.7MB in the end (delta: -49.9MB). Peak memory consumption was 50.5MB. Max. memory is 16.1GB. [2021-12-18 00:21:00,101 INFO L158 Benchmark]: TraceAbstraction took 508608.16ms. Allocated memory was 222.3MB in the beginning and 671.1MB in the end (delta: 448.8MB). Free memory was 130.7MB in the beginning and 486.8MB in the end (delta: -356.2MB). Peak memory consumption was 94.2MB. Max. memory is 16.1GB. [2021-12-18 00:21:00,102 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 79.7MB. Free memory was 37.7MB in the beginning and 37.7MB in the end (delta: 65.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1643.09ms. Allocated memory was 115.3MB in the beginning and 172.0MB in the end (delta: 56.6MB). Free memory was 73.1MB in the beginning and 99.5MB in the end (delta: -26.5MB). Peak memory consumption was 60.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 177.23ms. Allocated memory is still 172.0MB. Free memory was 99.5MB in the beginning and 88.0MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 78.61ms. Allocated memory is still 172.0MB. Free memory was 88.0MB in the beginning and 80.8MB in the end (delta: 7.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 856.50ms. Allocated memory was 172.0MB in the beginning and 222.3MB in the end (delta: 50.3MB). Free memory was 80.8MB in the beginning and 130.7MB in the end (delta: -49.9MB). Peak memory consumption was 50.5MB. Max. memory is 16.1GB. * TraceAbstraction took 508608.16ms. Allocated memory was 222.3MB in the beginning and 671.1MB in the end (delta: 448.8MB). Free memory was 130.7MB in the beginning and 486.8MB in the end (delta: -356.2MB). Peak memory consumption was 94.2MB. 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.modelcheckerutils.smt.MonolithicImplicationChecker@38374301 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@38374301: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-18 00:21:00,319 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-12-18 00:21:00,385 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 137 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_cursor_compare_lexical_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 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 00:21:01,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 00:21:01,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 00:21:01,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 00:21:01,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 00:21:01,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 00:21:01,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 00:21:01,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 00:21:01,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 00:21:01,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 00:21:01,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 00:21:01,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 00:21:01,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 00:21:01,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 00:21:01,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 00:21:01,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 00:21:01,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 00:21:01,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 00:21:01,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 00:21:01,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 00:21:01,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 00:21:01,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 00:21:01,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 00:21:01,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 00:21:01,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 00:21:01,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 00:21:01,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 00:21:01,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 00:21:01,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 00:21:01,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 00:21:01,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 00:21:01,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 00:21:01,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 00:21:01,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 00:21:01,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 00:21:01,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 00:21:01,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 00:21:01,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 00:21:01,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 00:21:01,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 00:21:01,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 00:21:01,993 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-12-18 00:21:02,021 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 00:21:02,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 00:21:02,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 00:21:02,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 00:21:02,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 00:21:02,023 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 00:21:02,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 00:21:02,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 00:21:02,025 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 00:21:02,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 00:21:02,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 00:21:02,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 00:21:02,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 00:21:02,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 00:21:02,026 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 00:21:02,026 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 00:21:02,026 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 00:21:02,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 00:21:02,027 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 00:21:02,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 00:21:02,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 00:21:02,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 00:21:02,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 00:21:02,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:21:02,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 00:21:02,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 00:21:02,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 00:21:02,028 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 00:21:02,028 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 00:21:02,028 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 00:21:02,029 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 00:21:02,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 00:21:02,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 00:21:02,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 00:21:02,029 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 [2021-12-18 00:21:02,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 00:21:02,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 00:21:02,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 00:21:02,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 00:21:02,298 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 00:21:02,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-12-18 00:21:02,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7f27ee1d/76073fed0b584c288dddf79caf7d24bf/FLAG3d2059875 [2021-12-18 00:21:02,989 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 00:21:02,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-12-18 00:21:03,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7f27ee1d/76073fed0b584c288dddf79caf7d24bf/FLAG3d2059875 [2021-12-18 00:21:03,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7f27ee1d/76073fed0b584c288dddf79caf7d24bf [2021-12-18 00:21:03,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 00:21:03,157 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 00:21:03,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 00:21:03,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 00:21:03,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 00:21:03,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:21:03" (1/1) ... [2021-12-18 00:21:03,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ca20648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:03, skipping insertion in model container [2021-12-18 00:21:03,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:21:03" (1/1) ... [2021-12-18 00:21:03,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 00:21:03,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:21:03,459 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_cursor_compare_lexical_harness.i[4505,4518] [2021-12-18 00:21:03,463 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_cursor_compare_lexical_harness.i[4565,4578] [2021-12-18 00:21:03,960 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:03,964 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:03,964 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:03,965 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:03,965 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:03,978 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:03,980 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:03,981 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:03,982 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,180 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:21:04,193 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:21:04,194 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:21:04,195 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:21:04,196 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:21:04,196 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:21:04,196 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:21:04,197 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:21:04,197 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:21:04,198 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:21:04,281 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:21:04,384 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,385 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:21:04,524 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 00:21:04,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:21:04,556 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_cursor_compare_lexical_harness.i[4505,4518] [2021-12-18 00:21:04,556 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_cursor_compare_lexical_harness.i[4565,4578] [2021-12-18 00:21:04,582 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,582 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,596 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,597 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,597 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,601 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,601 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,602 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,602 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,619 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:21:04,619 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:21:04,620 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:21:04,620 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:21:04,621 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:21:04,621 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:21:04,622 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:21:04,622 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:21:04,622 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:21:04,622 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:21:04,633 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:21:04,671 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,671 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:21:04,732 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 00:21:04,748 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_cursor_compare_lexical_harness.i[4505,4518] [2021-12-18 00:21:04,748 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_cursor_compare_lexical_harness.i[4565,4578] [2021-12-18 00:21:04,781 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,781 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,782 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,782 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,782 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,785 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,786 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,786 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,787 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,811 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:21:04,812 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:21:04,813 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:21:04,814 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:21:04,814 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:21:04,815 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:21:04,816 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:21:04,816 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:21:04,816 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:21:04,817 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:21:04,842 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:21:04,884 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,885 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:21:04,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:21:05,118 INFO L208 MainTranslator]: Completed translation [2021-12-18 00:21:05,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:05 WrapperNode [2021-12-18 00:21:05,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 00:21:05,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 00:21:05,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 00:21:05,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 00:21:05,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:05" (1/1) ... [2021-12-18 00:21:05,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:05" (1/1) ... [2021-12-18 00:21:05,270 INFO L137 Inliner]: procedures = 711, calls = 2656, calls flagged for inlining = 59, calls inlined = 6, statements flattened = 922 [2021-12-18 00:21:05,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 00:21:05,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 00:21:05,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 00:21:05,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 00:21:05,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:05" (1/1) ... [2021-12-18 00:21:05,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:05" (1/1) ... [2021-12-18 00:21:05,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:05" (1/1) ... [2021-12-18 00:21:05,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:05" (1/1) ... [2021-12-18 00:21:05,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:05" (1/1) ... [2021-12-18 00:21:05,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:05" (1/1) ... [2021-12-18 00:21:05,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:05" (1/1) ... [2021-12-18 00:21:05,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 00:21:05,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 00:21:05,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 00:21:05,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 00:21:05,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:05" (1/1) ... [2021-12-18 00:21:05,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:21:05,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:21:05,412 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 00:21:05,426 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 00:21:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-18 00:21:05,442 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-18 00:21:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_compare_lexical [2021-12-18 00:21:05,442 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_compare_lexical [2021-12-18 00:21:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-18 00:21:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 00:21:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-18 00:21:05,443 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-18 00:21:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-18 00:21:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-18 00:21:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_bounded [2021-12-18 00:21:05,443 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_bounded [2021-12-18 00:21:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 00:21:05,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 00:21:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 00:21:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 00:21:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-18 00:21:05,444 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-18 00:21:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 00:21:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 00:21:05,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 00:21:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-18 00:21:05,445 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-18 00:21:05,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-18 00:21:05,445 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-18 00:21:05,445 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-18 00:21:05,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-12-18 00:21:05,445 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 00:21:05,445 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 00:21:05,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 00:21:05,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 00:21:05,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-12-18 00:21:05,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-18 00:21:05,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 00:21:05,446 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-18 00:21:05,446 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-18 00:21:05,447 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-12-18 00:21:05,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-12-18 00:21:05,726 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 00:21:05,728 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 00:21:06,846 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 00:21:06,851 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 00:21:06,851 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-18 00:21:06,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:21:06 BoogieIcfgContainer [2021-12-18 00:21:06,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 00:21:06,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 00:21:06,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 00:21:06,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 00:21:06,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 12:21:03" (1/3) ... [2021-12-18 00:21:06,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be19e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:21:06, skipping insertion in model container [2021-12-18 00:21:06,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:21:05" (2/3) ... [2021-12-18 00:21:06,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be19e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:21:06, skipping insertion in model container [2021-12-18 00:21:06,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:21:06" (3/3) ... [2021-12-18 00:21:06,858 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_compare_lexical_harness.i [2021-12-18 00:21:06,861 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 00:21:06,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 00:21:06,890 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 00:21:06,894 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 00:21:06,894 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 00:21:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 91 states have internal predecessors, (111), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-18 00:21:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-18 00:21:06,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:21:06,922 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:21:06,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:21:06,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:21:06,928 INFO L85 PathProgramCache]: Analyzing trace with hash 720675663, now seen corresponding path program 1 times [2021-12-18 00:21:06,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:21:06,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838705836] [2021-12-18 00:21:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:21:06,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:21:06,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:21:06,943 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 00:21:07,011 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 00:21:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:21:07,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 00:21:07,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:21:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-18 00:21:08,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:21:08,097 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:21:08,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838705836] [2021-12-18 00:21:08,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838705836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:21:08,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:21:08,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 00:21:08,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033764690] [2021-12-18 00:21:08,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:21:08,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 00:21:08,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:21:08,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 00:21:08,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:21:08,120 INFO L87 Difference]: Start difference. First operand has 149 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 91 states have internal predecessors, (111), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-18 00:21:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:21:08,437 INFO L93 Difference]: Finished difference Result 297 states and 443 transitions. [2021-12-18 00:21:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:21:08,440 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), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 120 [2021-12-18 00:21:08,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:21:08,446 INFO L225 Difference]: With dead ends: 297 [2021-12-18 00:21:08,446 INFO L226 Difference]: Without dead ends: 146 [2021-12-18 00:21:08,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 116 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 00:21:08,452 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 46 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:21:08,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 489 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 00:21:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-18 00:21:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-12-18 00:21:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 87 states have (on average 1.206896551724138) internal successors, (105), 89 states have internal predecessors, (105), 46 states have call successors, (46), 11 states have call predecessors, (46), 12 states have return successors, (51), 45 states have call predecessors, (51), 45 states have call successors, (51) [2021-12-18 00:21:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 202 transitions. [2021-12-18 00:21:08,485 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 202 transitions. Word has length 120 [2021-12-18 00:21:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:21:08,486 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 202 transitions. [2021-12-18 00:21:08,486 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), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-18 00:21:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 202 transitions. [2021-12-18 00:21:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-18 00:21:08,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:21:08,489 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:21:08,520 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 00:21:08,715 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 00:21:08,716 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:21:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:21:08,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1914357044, now seen corresponding path program 1 times [2021-12-18 00:21:08,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:21:08,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831042454] [2021-12-18 00:21:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:21:08,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:21:08,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:21:08,719 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 00:21:08,722 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 00:21:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:21:09,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 00:21:09,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:21:09,635 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 [2021-12-18 00:21:09,656 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 [2021-12-18 00:21:10,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 00:21:10,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 00:21:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 97 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-18 00:21:10,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:21:10,884 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 38 treesize of output 32 [2021-12-18 00:21:10,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:21:10,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:21:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-18 00:21:10,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:21:10,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831042454] [2021-12-18 00:21:10,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831042454] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:21:10,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:21:10,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-12-18 00:21:10,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868502741] [2021-12-18 00:21:10,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:21:10,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 00:21:10,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:21:10,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 00:21:10,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:21:10,964 INFO L87 Difference]: Start difference. First operand 146 states and 202 transitions. Second operand has 13 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 7 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 7 states have call successors, (36) [2021-12-18 00:21:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:21:12,484 INFO L93 Difference]: Finished difference Result 312 states and 427 transitions. [2021-12-18 00:21:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 00:21:12,486 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 7 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 7 states have call successors, (36) Word has length 122 [2021-12-18 00:21:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:21:12,488 INFO L225 Difference]: With dead ends: 312 [2021-12-18 00:21:12,488 INFO L226 Difference]: Without dead ends: 149 [2021-12-18 00:21:12,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 226 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-12-18 00:21:12,490 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 53 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:21:12,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1409 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 289 Invalid, 0 Unknown, 51 Unchecked, 1.3s Time] [2021-12-18 00:21:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-18 00:21:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-12-18 00:21:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 89 states have (on average 1.202247191011236) internal successors, (107), 92 states have internal predecessors, (107), 46 states have call successors, (46), 11 states have call predecessors, (46), 13 states have return successors, (52), 45 states have call predecessors, (52), 45 states have call successors, (52) [2021-12-18 00:21:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 205 transitions. [2021-12-18 00:21:12,513 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 205 transitions. Word has length 122 [2021-12-18 00:21:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:21:12,513 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 205 transitions. [2021-12-18 00:21:12,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 7 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 7 states have call successors, (36) [2021-12-18 00:21:12,514 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 205 transitions. [2021-12-18 00:21:12,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-18 00:21:12,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:21:12,515 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:21:12,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-18 00:21:12,739 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 00:21:12,739 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:21:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:21:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash 336294785, now seen corresponding path program 1 times [2021-12-18 00:21:12,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:21:12,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662304862] [2021-12-18 00:21:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:21:12,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:21:12,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:21:12,743 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 00:21:12,745 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 00:21:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:21:13,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 1610 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 00:21:13,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:21:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-18 00:21:13,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:21:13,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:21:13,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662304862] [2021-12-18 00:21:13,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662304862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:21:13,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:21:13,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 00:21:13,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328878930] [2021-12-18 00:21:13,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:21:13,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:21:13,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:21:13,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:21:13,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:21:13,862 INFO L87 Difference]: Start difference. First operand 149 states and 205 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-18 00:21:14,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:21:14,535 INFO L93 Difference]: Finished difference Result 241 states and 336 transitions. [2021-12-18 00:21:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:21:14,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 133 [2021-12-18 00:21:14,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:21:14,538 INFO L225 Difference]: With dead ends: 241 [2021-12-18 00:21:14,538 INFO L226 Difference]: Without dead ends: 149 [2021-12-18 00:21:14,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:21:14,539 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 77 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:21:14,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 904 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 00:21:14,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-18 00:21:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-12-18 00:21:14,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 89 states have (on average 1.202247191011236) internal successors, (107), 92 states have internal predecessors, (107), 46 states have call successors, (46), 11 states have call predecessors, (46), 13 states have return successors, (50), 45 states have call predecessors, (50), 45 states have call successors, (50) [2021-12-18 00:21:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 203 transitions. [2021-12-18 00:21:14,551 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 203 transitions. Word has length 133 [2021-12-18 00:21:14,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:21:14,552 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 203 transitions. [2021-12-18 00:21:14,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-18 00:21:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 203 transitions. [2021-12-18 00:21:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-18 00:21:14,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:21:14,553 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:21:14,583 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 00:21:14,767 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 00:21:14,768 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:21:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:21:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -162072693, now seen corresponding path program 2 times [2021-12-18 00:21:14,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:21:14,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107819034] [2021-12-18 00:21:14,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:21:14,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:21:14,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:21:14,771 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 00:21:14,773 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 00:21:15,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 00:21:15,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:21:15,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 00:21:15,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:21:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-12-18 00:21:15,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:21:15,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:21:15,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107819034] [2021-12-18 00:21:15,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107819034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:21:15,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:21:15,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 00:21:15,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146781760] [2021-12-18 00:21:15,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:21:15,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:21:15,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:21:15,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:21:15,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:21:15,470 INFO L87 Difference]: Start difference. First operand 149 states and 203 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-18 00:21:15,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:21:15,544 INFO L93 Difference]: Finished difference Result 161 states and 222 transitions. [2021-12-18 00:21:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:21:15,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 137 [2021-12-18 00:21:15,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:21:15,546 INFO L225 Difference]: With dead ends: 161 [2021-12-18 00:21:15,546 INFO L226 Difference]: Without dead ends: 159 [2021-12-18 00:21:15,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-18 00:21:15,547 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 16 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:21:15,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1340 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:21:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-18 00:21:15,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2021-12-18 00:21:15,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 99 states have internal predecessors, (113), 47 states have call successors, (47), 12 states have call predecessors, (47), 15 states have return successors, (59), 46 states have call predecessors, (59), 46 states have call successors, (59) [2021-12-18 00:21:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 219 transitions. [2021-12-18 00:21:15,559 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 219 transitions. Word has length 137 [2021-12-18 00:21:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:21:15,560 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 219 transitions. [2021-12-18 00:21:15,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-18 00:21:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 219 transitions. [2021-12-18 00:21:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-18 00:21:15,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:21:15,562 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:21:15,587 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 00:21:15,775 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 00:21:15,775 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:21:15,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:21:15,775 INFO L85 PathProgramCache]: Analyzing trace with hash -855959597, now seen corresponding path program 1 times [2021-12-18 00:21:15,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:21:15,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601282296] [2021-12-18 00:21:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:21:15,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:21:15,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:21:15,778 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 00:21:15,779 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 00:21:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:21:16,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 00:21:16,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:21:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-18 00:21:16,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:21:16,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:21:16,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601282296] [2021-12-18 00:21:16,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601282296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:21:16,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:21:16,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 00:21:16,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020250251] [2021-12-18 00:21:16,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:21:16,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:21:16,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:21:16,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:21:16,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:21:16,947 INFO L87 Difference]: Start difference. First operand 158 states and 219 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-18 00:21:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:21:17,435 INFO L93 Difference]: Finished difference Result 306 states and 436 transitions. [2021-12-18 00:21:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:21:17,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 141 [2021-12-18 00:21:17,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:21:17,438 INFO L225 Difference]: With dead ends: 306 [2021-12-18 00:21:17,438 INFO L226 Difference]: Without dead ends: 188 [2021-12-18 00:21:17,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:21:17,439 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 76 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:21:17,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 857 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 00:21:17,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-18 00:21:17,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-12-18 00:21:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 115 states have internal predecessors, (133), 60 states have call successors, (60), 13 states have call predecessors, (60), 16 states have return successors, (74), 59 states have call predecessors, (74), 59 states have call successors, (74) [2021-12-18 00:21:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 267 transitions. [2021-12-18 00:21:17,451 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 267 transitions. Word has length 141 [2021-12-18 00:21:17,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:21:17,452 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 267 transitions. [2021-12-18 00:21:17,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-18 00:21:17,452 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 267 transitions. [2021-12-18 00:21:17,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-18 00:21:17,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:21:17,453 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:21:17,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-18 00:21:17,679 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 00:21:17,680 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:21:17,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:21:17,680 INFO L85 PathProgramCache]: Analyzing trace with hash -277441864, now seen corresponding path program 1 times [2021-12-18 00:21:17,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:21:17,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051333498] [2021-12-18 00:21:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:21:17,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:21:17,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:21:17,683 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 00:21:17,683 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 00:21:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:21:18,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 00:21:18,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:21:20,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:21:20,296 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 99 treesize of output 35 [2021-12-18 00:21:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 163 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-18 00:21:20,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:21:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-12-18 00:21:21,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:21:21,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051333498] [2021-12-18 00:21:21,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051333498] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:21:21,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:21:21,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 16 [2021-12-18 00:21:21,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039628999] [2021-12-18 00:21:21,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:21:21,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 00:21:21,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:21:21,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 00:21:21,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-18 00:21:21,840 INFO L87 Difference]: Start difference. First operand 188 states and 267 transitions. Second operand has 16 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 6 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (39), 5 states have call predecessors, (39), 6 states have call successors, (39) [2021-12-18 00:21:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:21:31,908 INFO L93 Difference]: Finished difference Result 448 states and 663 transitions. [2021-12-18 00:21:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 00:21:31,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 6 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (39), 5 states have call predecessors, (39), 6 states have call successors, (39) Word has length 143 [2021-12-18 00:21:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:21:31,912 INFO L225 Difference]: With dead ends: 448 [2021-12-18 00:21:31,912 INFO L226 Difference]: Without dead ends: 326 [2021-12-18 00:21:31,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 267 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 00:21:31,913 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 273 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:21:31,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 926 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1159 Invalid, 0 Unknown, 389 Unchecked, 8.0s Time] [2021-12-18 00:21:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-18 00:21:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 244. [2021-12-18 00:21:31,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 143 states have (on average 1.167832167832168) internal successors, (167), 146 states have internal predecessors, (167), 82 states have call successors, (82), 16 states have call predecessors, (82), 18 states have return successors, (99), 81 states have call predecessors, (99), 81 states have call successors, (99) [2021-12-18 00:21:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 348 transitions. [2021-12-18 00:21:31,940 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 348 transitions. Word has length 143 [2021-12-18 00:21:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:21:31,940 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 348 transitions. [2021-12-18 00:21:31,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 6 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (39), 5 states have call predecessors, (39), 6 states have call successors, (39) [2021-12-18 00:21:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 348 transitions. [2021-12-18 00:21:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-18 00:21:31,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:21:31,942 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:21:31,977 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 00:21:32,155 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 00:21:32,155 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:21:32,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:21:32,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1766253824, now seen corresponding path program 2 times [2021-12-18 00:21:32,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:21:32,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210278633] [2021-12-18 00:21:32,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:21:32,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:21:32,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:21:32,158 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 00:21:32,159 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 00:21:37,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:21:37,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:21:37,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 00:21:37,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:21:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 130 proven. 26 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-18 00:21:41,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:21:46,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:21:46,013 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 00:21:46,033 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-18 00:21:46,034 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 00:21:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-18 00:21:46,143 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:21:46,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210278633] [2021-12-18 00:21:46,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210278633] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:21:46,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:21:46,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2021-12-18 00:21:46,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27936064] [2021-12-18 00:21:46,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:21:46,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 00:21:46,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:21:46,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 00:21:46,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 00:21:46,146 INFO L87 Difference]: Start difference. First operand 244 states and 348 transitions. Second operand has 33 states, 30 states have (on average 3.8) internal successors, (114), 30 states have internal predecessors, (114), 8 states have call successors, (42), 4 states have call predecessors, (42), 8 states have return successors, (39), 7 states have call predecessors, (39), 7 states have call successors, (39) [2021-12-18 00:21:58,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:21:58,402 INFO L93 Difference]: Finished difference Result 589 states and 905 transitions. [2021-12-18 00:21:58,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-18 00:21:58,403 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 3.8) internal successors, (114), 30 states have internal predecessors, (114), 8 states have call successors, (42), 4 states have call predecessors, (42), 8 states have return successors, (39), 7 states have call predecessors, (39), 7 states have call successors, (39) Word has length 147 [2021-12-18 00:21:58,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:21:58,406 INFO L225 Difference]: With dead ends: 589 [2021-12-18 00:21:58,406 INFO L226 Difference]: Without dead ends: 438 [2021-12-18 00:21:58,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 254 SyntacticMatches, 16 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=766, Invalid=6040, Unknown=0, NotChecked=0, Total=6806 [2021-12-18 00:21:58,409 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 255 mSDsluCounter, 3389 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 3599 SdHoareTripleChecker+Invalid, 2554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 652 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-18 00:21:58,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 3599 Invalid, 2554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1816 Invalid, 0 Unknown, 652 Unchecked, 5.8s Time] [2021-12-18 00:21:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-12-18 00:21:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 349. [2021-12-18 00:21:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 213 states have (on average 1.1690140845070423) internal successors, (249), 220 states have internal predecessors, (249), 110 states have call successors, (110), 19 states have call predecessors, (110), 25 states have return successors, (174), 109 states have call predecessors, (174), 109 states have call successors, (174) [2021-12-18 00:21:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 533 transitions. [2021-12-18 00:21:58,437 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 533 transitions. Word has length 147 [2021-12-18 00:21:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:21:58,437 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 533 transitions. [2021-12-18 00:21:58,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 3.8) internal successors, (114), 30 states have internal predecessors, (114), 8 states have call successors, (42), 4 states have call predecessors, (42), 8 states have return successors, (39), 7 states have call predecessors, (39), 7 states have call successors, (39) [2021-12-18 00:21:58,438 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 533 transitions. [2021-12-18 00:21:58,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-18 00:21:58,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:21:58,440 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:21:58,472 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 00:21:58,667 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 00:21:58,668 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:21:58,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:21:58,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1508088386, now seen corresponding path program 1 times [2021-12-18 00:21:58,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:21:58,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235055357] [2021-12-18 00:21:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:21:58,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:21:58,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:21:58,671 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 00:21:58,686 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 00:21:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:21:59,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 00:21:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:22:04,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:22:04,208 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 173 treesize of output 165 [2021-12-18 00:22:04,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:22:04,223 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 165 treesize of output 157 [2021-12-18 00:22:04,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:22:04,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 207 treesize of output 175 [2021-12-18 00:22:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 151 proven. 3 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-18 00:22:04,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:22:33,187 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 94 treesize of output 82 [2021-12-18 00:22:33,201 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 88 treesize of output 76 [2021-12-18 00:22:33,208 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-18 00:22:33,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 200 treesize of output 1 [2021-12-18 00:22:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-18 00:22:33,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:22:33,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235055357] [2021-12-18 00:22:33,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235055357] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:22:33,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:22:33,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2021-12-18 00:22:33,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569124211] [2021-12-18 00:22:33,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:22:33,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 00:22:33,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:22:33,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 00:22:33,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1350, Unknown=6, NotChecked=0, Total=1482 [2021-12-18 00:22:33,282 INFO L87 Difference]: Start difference. First operand 349 states and 533 transitions. Second operand has 39 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 10 states have call successors, (41), 8 states have call predecessors, (41), 9 states have return successors, (38), 6 states have call predecessors, (38), 10 states have call successors, (38) [2021-12-18 00:23:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:23:20,495 INFO L93 Difference]: Finished difference Result 798 states and 1252 transitions. [2021-12-18 00:23:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-18 00:23:20,498 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 10 states have call successors, (41), 8 states have call predecessors, (41), 9 states have return successors, (38), 6 states have call predecessors, (38), 10 states have call successors, (38) Word has length 147 [2021-12-18 00:23:20,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:23:20,501 INFO L225 Difference]: With dead ends: 798 [2021-12-18 00:23:20,501 INFO L226 Difference]: Without dead ends: 538 [2021-12-18 00:23:20,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 254 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=481, Invalid=4342, Unknown=7, NotChecked=0, Total=4830 [2021-12-18 00:23:20,503 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 376 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 3334 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 5133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 3334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1604 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2021-12-18 00:23:20,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 1244 Invalid, 5133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 3334 Invalid, 0 Unknown, 1604 Unchecked, 28.9s Time] [2021-12-18 00:23:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-12-18 00:23:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 524. [2021-12-18 00:23:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 312 states have (on average 1.169871794871795) internal successors, (365), 322 states have internal predecessors, (365), 180 states have call successors, (180), 22 states have call predecessors, (180), 31 states have return successors, (286), 179 states have call predecessors, (286), 179 states have call successors, (286) [2021-12-18 00:23:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 831 transitions. [2021-12-18 00:23:20,548 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 831 transitions. Word has length 147 [2021-12-18 00:23:20,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:23:20,549 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 831 transitions. [2021-12-18 00:23:20,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 10 states have call successors, (41), 8 states have call predecessors, (41), 9 states have return successors, (38), 6 states have call predecessors, (38), 10 states have call successors, (38) [2021-12-18 00:23:20,549 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 831 transitions. [2021-12-18 00:23:20,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-18 00:23:20,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:23:20,552 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:23:20,593 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 00:23:20,779 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 00:23:20,779 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:23:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:23:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash 400369404, now seen corresponding path program 1 times [2021-12-18 00:23:20,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:23:20,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588016825] [2021-12-18 00:23:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:23:20,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:23:20,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:23:20,783 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 00:23:20,784 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 00:23:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:23:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1634 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 00:23:21,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:23:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-18 00:23:22,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:23:22,115 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:23:22,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588016825] [2021-12-18 00:23:22,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588016825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:23:22,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:23:22,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 00:23:22,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898522220] [2021-12-18 00:23:22,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:23:22,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:23:22,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:23:22,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:23:22,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 00:23:22,117 INFO L87 Difference]: Start difference. First operand 524 states and 831 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-18 00:23:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:23:23,025 INFO L93 Difference]: Finished difference Result 998 states and 1614 transitions. [2021-12-18 00:23:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 00:23:23,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 147 [2021-12-18 00:23:23,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:23:23,031 INFO L225 Difference]: With dead ends: 998 [2021-12-18 00:23:23,031 INFO L226 Difference]: Without dead ends: 481 [2021-12-18 00:23:23,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:23:23,033 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 3 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 00:23:23,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 518 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 28 Unchecked, 0.7s Time] [2021-12-18 00:23:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-12-18 00:23:23,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 481. [2021-12-18 00:23:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 285 states have (on average 1.1578947368421053) internal successors, (330), 293 states have internal predecessors, (330), 166 states have call successors, (166), 22 states have call predecessors, (166), 29 states have return successors, (234), 165 states have call predecessors, (234), 165 states have call successors, (234) [2021-12-18 00:23:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 730 transitions. [2021-12-18 00:23:23,065 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 730 transitions. Word has length 147 [2021-12-18 00:23:23,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:23:23,065 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 730 transitions. [2021-12-18 00:23:23,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-18 00:23:23,066 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 730 transitions. [2021-12-18 00:23:23,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-18 00:23:23,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:23:23,069 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:23:23,102 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 00:23:23,283 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 00:23:23,284 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:23:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:23:23,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1869815483, now seen corresponding path program 1 times [2021-12-18 00:23:23,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:23:23,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561881738] [2021-12-18 00:23:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:23:23,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:23:23,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:23:23,287 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 00:23:23,326 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 00:23:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:23:24,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 00:23:24,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:23:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-18 00:23:28,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:23:46,967 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 94 treesize of output 82 [2021-12-18 00:23:46,981 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 88 treesize of output 76 [2021-12-18 00:23:46,988 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-18 00:23:46,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 200 treesize of output 1 [2021-12-18 00:23:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-12-18 00:23:47,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:23:47,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561881738] [2021-12-18 00:23:47,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561881738] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:23:47,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:23:47,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-12-18 00:23:47,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165042893] [2021-12-18 00:23:47,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:23:47,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 00:23:47,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:23:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 00:23:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=813, Unknown=3, NotChecked=0, Total=930 [2021-12-18 00:23:47,057 INFO L87 Difference]: Start difference. First operand 481 states and 730 transitions. Second operand has 31 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 9 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 5 states have call predecessors, (39), 9 states have call successors, (39) [2021-12-18 00:24:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:24:04,274 INFO L93 Difference]: Finished difference Result 661 states and 973 transitions. [2021-12-18 00:24:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 00:24:04,276 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 9 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 5 states have call predecessors, (39), 9 states have call successors, (39) Word has length 149 [2021-12-18 00:24:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:24:04,278 INFO L225 Difference]: With dead ends: 661 [2021-12-18 00:24:04,278 INFO L226 Difference]: Without dead ends: 463 [2021-12-18 00:24:04,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=186, Invalid=1292, Unknown=4, NotChecked=0, Total=1482 [2021-12-18 00:24:04,280 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 243 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 835 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:24:04,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 1832 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 995 Invalid, 0 Unknown, 835 Unchecked, 11.5s Time] [2021-12-18 00:24:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-18 00:24:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 451. [2021-12-18 00:24:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 270 states have (on average 1.1555555555555554) internal successors, (312), 277 states have internal predecessors, (312), 150 states have call successors, (150), 24 states have call predecessors, (150), 30 states have return successors, (208), 149 states have call predecessors, (208), 149 states have call successors, (208) [2021-12-18 00:24:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 670 transitions. [2021-12-18 00:24:04,318 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 670 transitions. Word has length 149 [2021-12-18 00:24:04,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:24:04,318 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 670 transitions. [2021-12-18 00:24:04,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 9 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 5 states have call predecessors, (39), 9 states have call successors, (39) [2021-12-18 00:24:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 670 transitions. [2021-12-18 00:24:04,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-18 00:24:04,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:24:04,320 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:24:04,351 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 00:24:04,535 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 00:24:04,535 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:24:04,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:24:04,536 INFO L85 PathProgramCache]: Analyzing trace with hash -4096445, now seen corresponding path program 1 times [2021-12-18 00:24:04,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:24:04,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581062537] [2021-12-18 00:24:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:24:04,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:24:04,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:24:04,548 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 00:24:04,610 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 00:24:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:24:05,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 00:24:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:24:05,759 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 00:24:06,460 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 17 treesize of output 13 [2021-12-18 00:24:06,463 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 22 treesize of output 14 [2021-12-18 00:24:06,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-12-18 00:24:12,543 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-12-18 00:24:12,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 209 treesize of output 81 [2021-12-18 00:24:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 85 proven. 82 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-18 00:24:12,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:24:20,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:24:20,612 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 0 case distinctions, treesize of input 63 treesize of output 17 [2021-12-18 00:24:22,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-18 00:24:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-18 00:24:22,138 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:24:22,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581062537] [2021-12-18 00:24:22,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581062537] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:24:22,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:24:22,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 45 [2021-12-18 00:24:22,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901697627] [2021-12-18 00:24:22,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:24:22,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 00:24:22,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:24:22,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 00:24:22,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1849, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 00:24:22,139 INFO L87 Difference]: Start difference. First operand 451 states and 670 transitions. Second operand has 45 states, 41 states have (on average 2.7560975609756095) internal successors, (113), 35 states have internal predecessors, (113), 15 states have call successors, (47), 11 states have call predecessors, (47), 11 states have return successors, (43), 14 states have call predecessors, (43), 11 states have call successors, (43) [2021-12-18 00:24:50,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:24:50,147 INFO L93 Difference]: Finished difference Result 769 states and 1150 transitions. [2021-12-18 00:24:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-18 00:24:50,148 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.7560975609756095) internal successors, (113), 35 states have internal predecessors, (113), 15 states have call successors, (47), 11 states have call predecessors, (47), 11 states have return successors, (43), 14 states have call predecessors, (43), 11 states have call successors, (43) Word has length 153 [2021-12-18 00:24:50,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:24:50,151 INFO L225 Difference]: With dead ends: 769 [2021-12-18 00:24:50,152 INFO L226 Difference]: Without dead ends: 761 [2021-12-18 00:24:50,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 234 SyntacticMatches, 29 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=287, Invalid=4135, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 00:24:50,156 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 219 mSDsluCounter, 5050 mSDsCounter, 0 mSdLazyCounter, 3214 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 5313 SdHoareTripleChecker+Invalid, 4496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1175 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2021-12-18 00:24:50,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 5313 Invalid, 4496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 3214 Invalid, 0 Unknown, 1175 Unchecked, 21.7s Time] [2021-12-18 00:24:50,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-12-18 00:24:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 635. [2021-12-18 00:24:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 382 states have (on average 1.143979057591623) internal successors, (437), 388 states have internal predecessors, (437), 206 states have call successors, (206), 41 states have call predecessors, (206), 46 states have return successors, (284), 205 states have call predecessors, (284), 205 states have call successors, (284) [2021-12-18 00:24:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 927 transitions. [2021-12-18 00:24:50,201 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 927 transitions. Word has length 153 [2021-12-18 00:24:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:24:50,202 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 927 transitions. [2021-12-18 00:24:50,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.7560975609756095) internal successors, (113), 35 states have internal predecessors, (113), 15 states have call successors, (47), 11 states have call predecessors, (47), 11 states have return successors, (43), 14 states have call predecessors, (43), 11 states have call successors, (43) [2021-12-18 00:24:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 927 transitions. [2021-12-18 00:24:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-18 00:24:50,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:24:50,215 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 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, 1, 1, 1, 1, 1, 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 00:24:50,261 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 00:24:50,431 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 00:24:50,431 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:24:50,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:24:50,432 INFO L85 PathProgramCache]: Analyzing trace with hash 515024224, now seen corresponding path program 1 times [2021-12-18 00:24:50,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:24:50,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307458674] [2021-12-18 00:24:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:24:50,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:24:50,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:24:50,436 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 00:24:50,477 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 00:24:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:24:51,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 00:24:51,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:24:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-18 00:24:51,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:24:51,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:24:51,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307458674] [2021-12-18 00:24:51,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307458674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:24:51,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:24:51,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 00:24:51,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670655531] [2021-12-18 00:24:51,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:24:51,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:24:51,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:24:51,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:24:51,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-18 00:24:51,685 INFO L87 Difference]: Start difference. First operand 635 states and 927 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-18 00:24:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:24:51,949 INFO L93 Difference]: Finished difference Result 789 states and 1149 transitions. [2021-12-18 00:24:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 00:24:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 156 [2021-12-18 00:24:51,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:24:51,952 INFO L225 Difference]: With dead ends: 789 [2021-12-18 00:24:51,952 INFO L226 Difference]: Without dead ends: 542 [2021-12-18 00:24:51,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 148 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 00:24:51,954 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 11 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:24:51,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1426 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 00:24:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-12-18 00:24:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-12-18 00:24:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 322 states have (on average 1.1428571428571428) internal successors, (368), 326 states have internal predecessors, (368), 178 states have call successors, (178), 38 states have call predecessors, (178), 41 states have return successors, (241), 177 states have call predecessors, (241), 177 states have call successors, (241) [2021-12-18 00:24:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 787 transitions. [2021-12-18 00:24:51,991 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 787 transitions. Word has length 156 [2021-12-18 00:24:51,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:24:51,991 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 787 transitions. [2021-12-18 00:24:51,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-18 00:24:51,992 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 787 transitions. [2021-12-18 00:24:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-18 00:24:51,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:24:51,995 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 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, 1, 1, 1, 1, 1, 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 00:24:52,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-18 00:24:52,203 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 00:24:52,203 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:24:52,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:24:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1133569376, now seen corresponding path program 2 times [2021-12-18 00:24:52,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:24:52,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871744276] [2021-12-18 00:24:52,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:24:52,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:24:52,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:24:52,207 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 00:24:52,209 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 00:24:57,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:24:57,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:24:57,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 00:24:57,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:25:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 153 proven. 11 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-18 00:25:00,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:25:04,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:25:04,143 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 00:25:04,172 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-18 00:25:04,172 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 00:25:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-18 00:25:04,301 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:25:04,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871744276] [2021-12-18 00:25:04,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871744276] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:25:04,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:25:04,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-12-18 00:25:04,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467372305] [2021-12-18 00:25:04,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:25:04,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 00:25:04,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:25:04,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 00:25:04,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-12-18 00:25:04,303 INFO L87 Difference]: Start difference. First operand 542 states and 787 transitions. Second operand has 22 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 6 states have call successors, (43), 4 states have call predecessors, (43), 5 states have return successors, (40), 5 states have call predecessors, (40), 5 states have call successors, (40) [2021-12-18 00:25:08,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 00:25:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:25:12,618 INFO L93 Difference]: Finished difference Result 759 states and 1100 transitions. [2021-12-18 00:25:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 00:25:12,619 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 6 states have call successors, (43), 4 states have call predecessors, (43), 5 states have return successors, (40), 5 states have call predecessors, (40), 5 states have call successors, (40) Word has length 156 [2021-12-18 00:25:12,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:25:12,622 INFO L225 Difference]: With dead ends: 759 [2021-12-18 00:25:12,622 INFO L226 Difference]: Without dead ends: 607 [2021-12-18 00:25:12,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 279 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 00:25:12,623 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 167 mSDsluCounter, 2030 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 2239 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-12-18 00:25:12,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 2239 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 868 Invalid, 0 Unknown, 108 Unchecked, 6.7s Time] [2021-12-18 00:25:12,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-12-18 00:25:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 564. [2021-12-18 00:25:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 340 states have (on average 1.1441176470588235) internal successors, (389), 346 states have internal predecessors, (389), 178 states have call successors, (178), 40 states have call predecessors, (178), 45 states have return successors, (239), 177 states have call predecessors, (239), 177 states have call successors, (239) [2021-12-18 00:25:12,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 806 transitions. [2021-12-18 00:25:12,658 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 806 transitions. Word has length 156 [2021-12-18 00:25:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:25:12,658 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 806 transitions. [2021-12-18 00:25:12,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 6 states have call successors, (43), 4 states have call predecessors, (43), 5 states have return successors, (40), 5 states have call predecessors, (40), 5 states have call successors, (40) [2021-12-18 00:25:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 806 transitions. [2021-12-18 00:25:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-18 00:25:12,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:25:12,661 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:12,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-18 00:25:12,883 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 00:25:12,883 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:25:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:25:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash -895484706, now seen corresponding path program 1 times [2021-12-18 00:25:12,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:25:12,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984112948] [2021-12-18 00:25:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:25:12,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:25:12,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:25:12,900 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 00:25:12,901 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 00:25:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:25:13,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 00:25:13,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:25:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 170 proven. 12 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-18 00:25:17,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:25:29,566 WARN L227 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 524 DAG size of output: 270 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-18 00:25:29,569 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-12-18 00:25:29,569 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 128 treesize of output 771 Killed by 15