./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_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 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 09:46:19,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 09:46:19,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 09:46:19,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 09:46:19,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 09:46:19,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 09:46:19,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 09:46:19,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 09:46:19,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 09:46:19,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 09:46:19,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 09:46:19,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 09:46:19,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 09:46:19,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 09:46:19,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 09:46:19,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 09:46:19,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 09:46:19,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 09:46:19,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 09:46:19,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 09:46:19,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 09:46:19,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 09:46:19,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 09:46:19,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 09:46:19,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 09:46:19,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 09:46:19,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 09:46:19,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 09:46:19,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 09:46:19,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 09:46:19,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 09:46:19,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 09:46:19,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 09:46:19,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 09:46:19,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 09:46:19,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 09:46:19,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 09:46:19,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 09:46:19,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 09:46:19,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 09:46:19,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 09:46:19,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 09:46:19,458 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 09:46:19,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 09:46:19,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 09:46:19,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 09:46:19,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 09:46:19,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 09:46:19,460 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 09:46:19,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 09:46:19,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 09:46:19,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 09:46:19,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 09:46:19,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 09:46:19,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 09:46:19,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 09:46:19,462 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 09:46:19,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 09:46:19,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 09:46:19,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 09:46:19,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 09:46:19,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 09:46:19,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 09:46:19,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 09:46:19,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 09:46:19,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 09:46:19,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 09:46:19,464 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 09:46:19,465 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 09:46:19,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 09:46:19,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 09:46:19,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2021-11-06 09:46:19,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 09:46:19,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 09:46:19,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 09:46:19,657 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 09:46:19,658 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 09:46:19,659 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-11-06 09:46:19,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd96da3b/d8d980660049400b9deac119ef55514c/FLAG46d215b6c [2021-11-06 09:46:20,266 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 09:46:20,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-11-06 09:46:20,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd96da3b/d8d980660049400b9deac119ef55514c/FLAG46d215b6c [2021-11-06 09:46:20,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd96da3b/d8d980660049400b9deac119ef55514c [2021-11-06 09:46:20,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 09:46:20,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 09:46:20,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 09:46:20,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 09:46:20,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 09:46:20,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:46:20" (1/1) ... [2021-11-06 09:46:20,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a308579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:20, skipping insertion in model container [2021-11-06 09:46:20,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:46:20" (1/1) ... [2021-11-06 09:46:20,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 09:46:20,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 09:46:20,773 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-11-06 09:46:20,780 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-11-06 09:46:20,799 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-06 09:46:20,805 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-06 09:46:21,200 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-06 09:46:21,246 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,247 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,247 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,249 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,251 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,260 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,260 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,261 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,262 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,263 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,263 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,264 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,264 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,441 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-06 09:46:21,442 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-06 09:46:21,442 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-06 09:46:21,443 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-06 09:46:21,444 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-06 09:46:21,444 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-06 09:46:21,445 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-06 09:46:21,445 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-06 09:46:21,445 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-06 09:46:21,446 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-06 09:46:21,507 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,511 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 09:46:21,572 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 09:46:21,580 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-11-06 09:46:21,580 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-11-06 09:46:21,582 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-06 09:46:21,582 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-06 09:46:21,600 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-06 09:46:21,611 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,611 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,611 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,611 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,612 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,623 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,623 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,625 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,625 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,628 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,628 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,628 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,629 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,670 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-06 09:46:21,678 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-06 09:46:21,678 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-06 09:46:21,679 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-06 09:46:21,680 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-06 09:46:21,681 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-06 09:46:21,681 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-06 09:46:21,682 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-06 09:46:21,682 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-06 09:46:21,682 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-06 09:46:21,697 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,704 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 09:46:21,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 09:46:21,874 INFO L208 MainTranslator]: Completed translation [2021-11-06 09:46:21,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:21 WrapperNode [2021-11-06 09:46:21,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 09:46:21,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 09:46:21,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 09:46:21,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 09:46:21,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:21" (1/1) ... [2021-11-06 09:46:21,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:21" (1/1) ... [2021-11-06 09:46:21,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 09:46:21,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 09:46:21,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 09:46:21,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 09:46:21,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:21" (1/1) ... [2021-11-06 09:46:21,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:21" (1/1) ... [2021-11-06 09:46:22,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:21" (1/1) ... [2021-11-06 09:46:22,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:21" (1/1) ... [2021-11-06 09:46:22,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:21" (1/1) ... [2021-11-06 09:46:22,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:21" (1/1) ... [2021-11-06 09:46:22,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:21" (1/1) ... [2021-11-06 09:46:22,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 09:46:22,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 09:46:22,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 09:46:22,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 09:46:22,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:21" (1/1) ... [2021-11-06 09:46:22,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 09:46:22,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 09:46:22,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 09:46:22,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 09:46:22,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 09:46:22,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 09:46:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 09:46:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 09:46:22,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 09:46:22,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 09:46:22,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 09:46:22,150 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-06 09:46:22,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 09:46:22,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 09:46:22,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 09:46:22,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 09:46:28,670 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 09:46:28,670 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-06 09:46:28,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:46:28 BoogieIcfgContainer [2021-11-06 09:46:28,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 09:46:28,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 09:46:28,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 09:46:28,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 09:46:28,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:46:20" (1/3) ... [2021-11-06 09:46:28,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efc4e19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:46:28, skipping insertion in model container [2021-11-06 09:46:28,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:46:21" (2/3) ... [2021-11-06 09:46:28,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efc4e19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:46:28, skipping insertion in model container [2021-11-06 09:46:28,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:46:28" (3/3) ... [2021-11-06 09:46:28,681 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_clean_up_harness.i [2021-11-06 09:46:28,687 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 09:46:28,688 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 09:46:28,720 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 09:46:28,724 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 09:46:28,726 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 09:46:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 81 states have (on average 1.4320987654320987) internal successors, (116), 82 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-06 09:46:28,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 09:46:28,741 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 09:46:28,742 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 09:46:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 09:46:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash -68563336, now seen corresponding path program 1 times [2021-11-06 09:46:28,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 09:46:28,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032450632] [2021-11-06 09:46:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:28,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 09:46:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 09:46:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 09:46:29,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 09:46:29,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032450632] [2021-11-06 09:46:29,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032450632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 09:46:29,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 09:46:29,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 09:46:29,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617473472] [2021-11-06 09:46:29,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 09:46:29,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 09:46:29,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 09:46:29,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 09:46:29,281 INFO L87 Difference]: Start difference. First operand has 83 states, 81 states have (on average 1.4320987654320987) internal successors, (116), 82 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:29,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 09:46:29,302 INFO L93 Difference]: Finished difference Result 162 states and 227 transitions. [2021-11-06 09:46:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 09:46:29,303 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-06 09:46:29,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 09:46:29,309 INFO L225 Difference]: With dead ends: 162 [2021-11-06 09:46:29,309 INFO L226 Difference]: Without dead ends: 78 [2021-11-06 09:46:29,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 09:46:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-06 09:46:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-06 09:46:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 77 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2021-11-06 09:46:29,334 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 31 [2021-11-06 09:46:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 09:46:29,334 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2021-11-06 09:46:29,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2021-11-06 09:46:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-06 09:46:29,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 09:46:29,336 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 09:46:29,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 09:46:29,336 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 09:46:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 09:46:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash 814292389, now seen corresponding path program 1 times [2021-11-06 09:46:29,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 09:46:29,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851549477] [2021-11-06 09:46:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:29,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 09:46:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 09:46:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 09:46:29,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 09:46:29,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851549477] [2021-11-06 09:46:29,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851549477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 09:46:29,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 09:46:29,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 09:46:29,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025633698] [2021-11-06 09:46:29,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 09:46:29,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 09:46:29,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 09:46:29,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 09:46:29,519 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 09:46:29,555 INFO L93 Difference]: Finished difference Result 143 states and 183 transitions. [2021-11-06 09:46:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 09:46:29,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-06 09:46:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 09:46:29,559 INFO L225 Difference]: With dead ends: 143 [2021-11-06 09:46:29,559 INFO L226 Difference]: Without dead ends: 79 [2021-11-06 09:46:29,560 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 09:46:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-06 09:46:29,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-06 09:46:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 78 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2021-11-06 09:46:29,572 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 34 [2021-11-06 09:46:29,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 09:46:29,572 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2021-11-06 09:46:29,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2021-11-06 09:46:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-06 09:46:29,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 09:46:29,573 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 09:46:29,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 09:46:29,574 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 09:46:29,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 09:46:29,574 INFO L85 PathProgramCache]: Analyzing trace with hash -571911005, now seen corresponding path program 1 times [2021-11-06 09:46:29,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 09:46:29,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002932627] [2021-11-06 09:46:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:29,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 09:46:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 09:46:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 09:46:29,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 09:46:29,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002932627] [2021-11-06 09:46:29,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002932627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 09:46:29,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 09:46:29,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 09:46:29,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930429995] [2021-11-06 09:46:29,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 09:46:29,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 09:46:29,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 09:46:29,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 09:46:29,808 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 09:46:29,928 INFO L93 Difference]: Finished difference Result 150 states and 189 transitions. [2021-11-06 09:46:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 09:46:29,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-06 09:46:29,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 09:46:29,931 INFO L225 Difference]: With dead ends: 150 [2021-11-06 09:46:29,931 INFO L226 Difference]: Without dead ends: 103 [2021-11-06 09:46:29,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 09:46:29,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-06 09:46:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-11-06 09:46:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 78 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2021-11-06 09:46:29,935 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 34 [2021-11-06 09:46:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 09:46:29,935 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2021-11-06 09:46:29,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2021-11-06 09:46:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-06 09:46:29,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 09:46:29,936 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 09:46:29,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 09:46:29,936 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 09:46:29,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 09:46:29,936 INFO L85 PathProgramCache]: Analyzing trace with hash 77568063, now seen corresponding path program 1 times [2021-11-06 09:46:29,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 09:46:29,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139404754] [2021-11-06 09:46:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:29,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 09:46:30,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 09:46:30,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974308642] [2021-11-06 09:46:30,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:30,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:46:30,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 09:46:30,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 09:46:30,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 09:46:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 09:46:30,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2381 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 09:46:30,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 09:46:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 09:46:30,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 09:46:30,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139404754] [2021-11-06 09:46:30,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 09:46:30,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974308642] [2021-11-06 09:46:30,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974308642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 09:46:30,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 09:46:30,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 09:46:30,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315442155] [2021-11-06 09:46:30,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 09:46:30,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 09:46:30,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 09:46:30,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 09:46:30,880 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:31,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 09:46:31,035 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2021-11-06 09:46:31,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 09:46:31,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-06 09:46:31,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 09:46:31,036 INFO L225 Difference]: With dead ends: 140 [2021-11-06 09:46:31,036 INFO L226 Difference]: Without dead ends: 99 [2021-11-06 09:46:31,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-06 09:46:31,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-06 09:46:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2021-11-06 09:46:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 79 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2021-11-06 09:46:31,041 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 42 [2021-11-06 09:46:31,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 09:46:31,041 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2021-11-06 09:46:31,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:31,041 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2021-11-06 09:46:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-06 09:46:31,042 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 09:46:31,042 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 09:46:31,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-06 09:46:31,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:46:31,252 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 09:46:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 09:46:31,252 INFO L85 PathProgramCache]: Analyzing trace with hash 79176777, now seen corresponding path program 1 times [2021-11-06 09:46:31,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 09:46:31,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297539629] [2021-11-06 09:46:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:31,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 09:46:31,333 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 09:46:31,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856428494] [2021-11-06 09:46:31,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:31,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:46:31,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 09:46:31,335 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 09:46:31,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 09:46:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 09:46:31,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 2384 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-06 09:46:31,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 09:46:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 09:46:32,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 09:46:32,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297539629] [2021-11-06 09:46:32,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 09:46:32,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856428494] [2021-11-06 09:46:32,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856428494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 09:46:32,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 09:46:32,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 09:46:32,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434969641] [2021-11-06 09:46:32,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 09:46:32,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 09:46:32,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 09:46:32,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 09:46:32,140 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 09:46:32,154 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2021-11-06 09:46:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 09:46:32,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-06 09:46:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 09:46:32,155 INFO L225 Difference]: With dead ends: 91 [2021-11-06 09:46:32,155 INFO L226 Difference]: Without dead ends: 81 [2021-11-06 09:46:32,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 09:46:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-06 09:46:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-06 09:46:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.25) internal successors, (100), 80 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2021-11-06 09:46:32,160 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 42 [2021-11-06 09:46:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 09:46:32,161 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2021-11-06 09:46:32,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2021-11-06 09:46:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-06 09:46:32,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 09:46:32,164 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 09:46:32,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 09:46:32,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:46:32,380 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 09:46:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 09:46:32,380 INFO L85 PathProgramCache]: Analyzing trace with hash -883480762, now seen corresponding path program 1 times [2021-11-06 09:46:32,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 09:46:32,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226763398] [2021-11-06 09:46:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:32,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 09:46:32,453 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 09:46:32,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780515997] [2021-11-06 09:46:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:32,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:46:32,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 09:46:32,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 09:46:32,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 09:46:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 09:46:33,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 2391 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-06 09:46:33,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 09:46:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 09:46:33,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 09:46:33,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226763398] [2021-11-06 09:46:33,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 09:46:33,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780515997] [2021-11-06 09:46:33,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780515997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 09:46:33,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 09:46:33,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 09:46:33,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256631272] [2021-11-06 09:46:33,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 09:46:33,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 09:46:33,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 09:46:33,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 09:46:33,264 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 09:46:33,305 INFO L93 Difference]: Finished difference Result 151 states and 186 transitions. [2021-11-06 09:46:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 09:46:33,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-06 09:46:33,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 09:46:33,307 INFO L225 Difference]: With dead ends: 151 [2021-11-06 09:46:33,307 INFO L226 Difference]: Without dead ends: 124 [2021-11-06 09:46:33,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 09:46:33,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-06 09:46:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2021-11-06 09:46:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 81 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2021-11-06 09:46:33,312 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 43 [2021-11-06 09:46:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 09:46:33,312 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2021-11-06 09:46:33,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:33,313 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2021-11-06 09:46:33,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-06 09:46:33,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 09:46:33,314 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 09:46:33,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 09:46:33,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:46:33,532 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 09:46:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 09:46:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash 759678460, now seen corresponding path program 1 times [2021-11-06 09:46:33,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 09:46:33,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807130736] [2021-11-06 09:46:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:33,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 09:46:33,579 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 09:46:33,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555871346] [2021-11-06 09:46:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:33,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:46:33,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 09:46:33,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 09:46:33,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 09:46:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 09:46:34,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 2394 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-06 09:46:34,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 09:46:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 09:46:34,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 09:46:34,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807130736] [2021-11-06 09:46:34,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 09:46:34,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555871346] [2021-11-06 09:46:34,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555871346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 09:46:34,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 09:46:34,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 09:46:34,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944420611] [2021-11-06 09:46:34,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 09:46:34,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 09:46:34,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 09:46:34,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 09:46:34,509 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:34,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 09:46:34,809 INFO L93 Difference]: Finished difference Result 123 states and 150 transitions. [2021-11-06 09:46:34,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 09:46:34,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-06 09:46:34,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 09:46:34,810 INFO L225 Difference]: With dead ends: 123 [2021-11-06 09:46:34,810 INFO L226 Difference]: Without dead ends: 99 [2021-11-06 09:46:34,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-06 09:46:34,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-06 09:46:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2021-11-06 09:46:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 81 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2021-11-06 09:46:34,817 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 43 [2021-11-06 09:46:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 09:46:34,817 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2021-11-06 09:46:34,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2021-11-06 09:46:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-06 09:46:34,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 09:46:34,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 09:46:34,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 09:46:35,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:46:35,040 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 09:46:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 09:46:35,040 INFO L85 PathProgramCache]: Analyzing trace with hash -897320858, now seen corresponding path program 1 times [2021-11-06 09:46:35,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 09:46:35,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720038242] [2021-11-06 09:46:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:35,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 09:46:35,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 09:46:35,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969892343] [2021-11-06 09:46:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:35,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:46:35,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 09:46:35,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 09:46:35,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 09:46:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 09:46:35,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 2411 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 09:46:35,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 09:46:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 09:46:36,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 09:46:36,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720038242] [2021-11-06 09:46:36,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 09:46:36,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969892343] [2021-11-06 09:46:36,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969892343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 09:46:36,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 09:46:36,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 09:46:36,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814025712] [2021-11-06 09:46:36,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 09:46:36,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 09:46:36,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 09:46:36,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 09:46:36,114 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 09:46:36,362 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2021-11-06 09:46:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 09:46:36,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-06 09:46:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 09:46:36,363 INFO L225 Difference]: With dead ends: 107 [2021-11-06 09:46:36,363 INFO L226 Difference]: Without dead ends: 82 [2021-11-06 09:46:36,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-06 09:46:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-06 09:46:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-06 09:46:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-11-06 09:46:36,367 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 45 [2021-11-06 09:46:36,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 09:46:36,367 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-11-06 09:46:36,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:46:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-11-06 09:46:36,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-06 09:46:36,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 09:46:36,368 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 09:46:36,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 09:46:36,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:46:36,569 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 09:46:36,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 09:46:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2085236277, now seen corresponding path program 1 times [2021-11-06 09:46:36,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 09:46:36,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970196236] [2021-11-06 09:46:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:36,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 09:46:36,616 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 09:46:36,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868991330] [2021-11-06 09:46:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:46:36,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:46:36,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 09:46:36,618 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 09:46:36,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 09:51:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 09:51:49,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 2398 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-06 09:51:49,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 09:51:50,424 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-06 09:51:50,621 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 [2021-11-06 09:51:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 09:51:50,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 09:51:50,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970196236] [2021-11-06 09:51:50,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 09:51:50,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868991330] [2021-11-06 09:51:50,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868991330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 09:51:50,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 09:51:50,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-06 09:51:50,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874171791] [2021-11-06 09:51:50,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-06 09:51:50,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 09:51:50,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-06 09:51:50,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-06 09:51:50,679 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:51:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 09:51:55,575 INFO L93 Difference]: Finished difference Result 188 states and 225 transitions. [2021-11-06 09:51:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-06 09:51:55,576 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-06 09:51:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 09:51:55,578 INFO L225 Difference]: With dead ends: 188 [2021-11-06 09:51:55,578 INFO L226 Difference]: Without dead ends: 184 [2021-11-06 09:51:55,578 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-11-06 09:51:55,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-06 09:51:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 118. [2021-11-06 09:51:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.2307692307692308) internal successors, (144), 117 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:51:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 144 transitions. [2021-11-06 09:51:55,584 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 144 transitions. Word has length 46 [2021-11-06 09:51:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 09:51:55,585 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 144 transitions. [2021-11-06 09:51:55,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:51:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 144 transitions. [2021-11-06 09:51:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-06 09:51:55,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 09:51:55,586 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 09:51:55,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 09:51:55,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:51:55,799 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 09:51:55,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 09:51:55,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1174821594, now seen corresponding path program 2 times [2021-11-06 09:51:55,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 09:51:55,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539844660] [2021-11-06 09:51:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:51:55,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 09:51:55,861 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 09:51:55,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104084770] [2021-11-06 09:51:55,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 09:51:55,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:51:55,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 09:51:55,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 09:51:55,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 09:56:19,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 09:56:19,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 09:56:20,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 2405 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-06 09:56:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 09:56:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 09:56:20,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 09:56:20,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539844660] [2021-11-06 09:56:20,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 09:56:20,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104084770] [2021-11-06 09:56:20,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104084770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 09:56:20,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 09:56:20,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-06 09:56:20,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902361649] [2021-11-06 09:56:20,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 09:56:20,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 09:56:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 09:56:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 09:56:20,442 INFO L87 Difference]: Start difference. First operand 118 states and 144 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:56:20,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 09:56:20,538 INFO L93 Difference]: Finished difference Result 254 states and 309 transitions. [2021-11-06 09:56:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 09:56:20,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-06 09:56:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 09:56:20,540 INFO L225 Difference]: With dead ends: 254 [2021-11-06 09:56:20,540 INFO L226 Difference]: Without dead ends: 221 [2021-11-06 09:56:20,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 09:56:20,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-06 09:56:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 120. [2021-11-06 09:56:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.226890756302521) internal successors, (146), 119 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:56:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2021-11-06 09:56:20,546 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 47 [2021-11-06 09:56:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 09:56:20,546 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2021-11-06 09:56:20,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 09:56:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2021-11-06 09:56:20,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-06 09:56:20,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 09:56:20,547 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 09:56:20,755 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forcibly destroying the process [2021-11-06 09:56:20,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 09:56:20,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:56:20,779 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 09:56:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 09:56:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1490136503, now seen corresponding path program 3 times [2021-11-06 09:56:20,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 09:56:20,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342754448] [2021-11-06 09:56:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 09:56:20,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 09:56:20,840 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 09:56:20,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259097705] [2021-11-06 09:56:20,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 09:56:20,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 09:56:20,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 09:56:20,842 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 09:56:20,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process Killed by 15