./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4d014703 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_set_at_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 156ab79a85c4b985ced0d661dede185c573e9f8e4fcba49b00d62d883c71bbed --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-02 12:23:52,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 12:23:53,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 12:23:53,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 12:23:53,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 12:23:53,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 12:23:53,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 12:23:53,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 12:23:53,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 12:23:53,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 12:23:53,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 12:23:53,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 12:23:53,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 12:23:53,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 12:23:53,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 12:23:53,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 12:23:53,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 12:23:53,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 12:23:53,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 12:23:53,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 12:23:53,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 12:23:53,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 12:23:53,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 12:23:53,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 12:23:53,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 12:23:53,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 12:23:53,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 12:23:53,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 12:23:53,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 12:23:53,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 12:23:53,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 12:23:53,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 12:23:53,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 12:23:53,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 12:23:53,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 12:23:53,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 12:23:53,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 12:23:53,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 12:23:53,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 12:23:53,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 12:23:53,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 12:23:53,076 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 12:23:53,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 12:23:53,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 12:23:53,100 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 12:23:53,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 12:23:53,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 12:23:53,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 12:23:53,102 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 12:23:53,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 12:23:53,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 12:23:53,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 12:23:53,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 12:23:53,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 12:23:53,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 12:23:53,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 12:23:53,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 12:23:53,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 12:23:53,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 12:23:53,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 12:23:53,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 12:23:53,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 12:23:53,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 12:23:53,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 12:23:53,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 12:23:53,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 12:23:53,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 12:23:53,105 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 12:23:53,105 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 12:23:53,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 12:23:53,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 12:23:53,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 156ab79a85c4b985ced0d661dede185c573e9f8e4fcba49b00d62d883c71bbed [2021-11-02 12:23:53,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 12:23:53,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 12:23:53,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 12:23:53,316 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 12:23:53,317 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 12:23:53,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i [2021-11-02 12:23:53,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2252dc245/9ac64d7e53d740019659eb4a3c32f80e/FLAGa4e3e15bf [2021-11-02 12:23:53,831 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 12:23:53,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i [2021-11-02 12:23:53,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2252dc245/9ac64d7e53d740019659eb4a3c32f80e/FLAGa4e3e15bf [2021-11-02 12:23:54,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2252dc245/9ac64d7e53d740019659eb4a3c32f80e [2021-11-02 12:23:54,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 12:23:54,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 12:23:54,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 12:23:54,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 12:23:54,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 12:23:54,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:23:54" (1/1) ... [2021-11-02 12:23:54,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e62307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:54, skipping insertion in model container [2021-11-02 12:23:54,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:23:54" (1/1) ... [2021-11-02 12:23:54,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 12:23:54,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 12:23:54,401 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_set_at_harness.i[4495,4508] [2021-11-02 12:23:54,406 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_set_at_harness.i[4555,4568] [2021-11-02 12:23:54,418 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-02 12:23:54,422 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-02 12:23:54,846 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-02 12:23:54,887 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:54,888 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:54,888 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:54,889 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:54,889 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:54,896 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:54,896 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:54,897 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:54,897 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:54,898 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:54,899 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:54,899 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:54,900 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,098 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-02 12:23:55,123 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-02 12:23:55,123 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-02 12:23:55,124 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-02 12:23:55,125 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-02 12:23:55,125 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-02 12:23:55,126 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-02 12:23:55,126 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-02 12:23:55,126 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-02 12:23:55,127 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-02 12:23:55,231 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,235 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,264 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,264 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,265 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 12:23:55,304 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 12:23:55,327 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_set_at_harness.i[4495,4508] [2021-11-02 12:23:55,329 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_set_at_harness.i[4555,4568] [2021-11-02 12:23:55,330 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-02 12:23:55,335 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-02 12:23:55,375 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-02 12:23:55,388 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,402 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,402 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,403 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,403 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,407 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,409 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,410 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,410 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,411 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,412 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,413 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,413 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,451 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-02 12:23:55,455 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-02 12:23:55,455 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-02 12:23:55,456 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-02 12:23:55,456 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-02 12:23:55,458 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-02 12:23:55,459 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-02 12:23:55,459 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-02 12:23:55,459 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-02 12:23:55,460 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-02 12:23:55,492 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,495 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,522 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,524 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,524 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 12:23:55,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 12:23:55,684 INFO L208 MainTranslator]: Completed translation [2021-11-02 12:23:55,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:55 WrapperNode [2021-11-02 12:23:55,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 12:23:55,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 12:23:55,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 12:23:55,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 12:23:55,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:55" (1/1) ... [2021-11-02 12:23:55,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:55" (1/1) ... [2021-11-02 12:23:55,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 12:23:55,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 12:23:55,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 12:23:55,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 12:23:55,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:55" (1/1) ... [2021-11-02 12:23:55,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:55" (1/1) ... [2021-11-02 12:23:55,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:55" (1/1) ... [2021-11-02 12:23:55,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:55" (1/1) ... [2021-11-02 12:23:55,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:55" (1/1) ... [2021-11-02 12:23:55,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:55" (1/1) ... [2021-11-02 12:23:56,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:55" (1/1) ... [2021-11-02 12:23:56,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 12:23:56,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 12:23:56,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 12:23:56,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 12:23:56,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:55" (1/1) ... [2021-11-02 12:23:56,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 12:23:56,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:23:56,089 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) [2021-11-02 12:23:56,147 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 [2021-11-02 12:23:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 12:23:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 12:23:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 12:23:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 12:23:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 12:23:56,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 12:23:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_uaddl_overflow [2021-11-02 12:23:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 12:23:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-02 12:23:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 12:23:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 12:23:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 12:23:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 12:24:00,400 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 12:24:00,401 INFO L299 CfgBuilder]: Removed 428 assume(true) statements. [2021-11-02 12:24:00,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:24:00 BoogieIcfgContainer [2021-11-02 12:24:00,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 12:24:00,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 12:24:00,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 12:24:00,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 12:24:00,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:23:54" (1/3) ... [2021-11-02 12:24:00,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dccd026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:24:00, skipping insertion in model container [2021-11-02 12:24:00,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:55" (2/3) ... [2021-11-02 12:24:00,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dccd026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:24:00, skipping insertion in model container [2021-11-02 12:24:00,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:24:00" (3/3) ... [2021-11-02 12:24:00,409 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_set_at_harness.i [2021-11-02 12:24:00,412 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 12:24:00,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-02 12:24:00,449 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 12:24:00,457 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 [2021-11-02 12:24:00,458 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-02 12:24:00,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 499 states, 478 states have (on average 1.405857740585774) internal successors, (672), 498 states have internal predecessors, (672), 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) [2021-11-02 12:24:00,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 12:24:00,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:24:00,484 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:24:00,485 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:24:00,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:24:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1815671953, now seen corresponding path program 1 times [2021-11-02 12:24:00,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:24:00,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955260851] [2021-11-02 12:24:00,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:00,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:24:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:24:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:24:00,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:24:00,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955260851] [2021-11-02 12:24:00,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955260851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:24:00,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:24:00,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 12:24:00,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127313234] [2021-11-02 12:24:00,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 12:24:00,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:24:00,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 12:24:00,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 12:24:00,937 INFO L87 Difference]: Start difference. First operand has 499 states, 478 states have (on average 1.405857740585774) internal successors, (672), 498 states have internal predecessors, (672), 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 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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) [2021-11-02 12:24:02,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:24:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:24:05,273 INFO L93 Difference]: Finished difference Result 994 states and 1339 transitions. [2021-11-02 12:24:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 12:24:05,276 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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 58 [2021-11-02 12:24:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:24:05,284 INFO L225 Difference]: With dead ends: 994 [2021-11-02 12:24:05,284 INFO L226 Difference]: Without dead ends: 494 [2021-11-02 12:24:05,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 12:24:05,298 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3850.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4229.82ms IncrementalHoareTripleChecker+Time [2021-11-02 12:24:05,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 624 Unknown, 0 Unchecked, 7.65ms Time], IncrementalHoareTripleChecker [0 Valid, 623 Invalid, 1 Unknown, 0 Unchecked, 4229.82ms Time] [2021-11-02 12:24:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-02 12:24:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 494. [2021-11-02 12:24:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 474 states have (on average 1.3059071729957805) internal successors, (619), 493 states have internal predecessors, (619), 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) [2021-11-02 12:24:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 619 transitions. [2021-11-02 12:24:05,371 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 619 transitions. Word has length 58 [2021-11-02 12:24:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:24:05,371 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 619 transitions. [2021-11-02 12:24:05,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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) [2021-11-02 12:24:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 619 transitions. [2021-11-02 12:24:05,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 12:24:05,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:24:05,380 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:24:05,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 12:24:05,380 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:24:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:24:05,381 INFO L85 PathProgramCache]: Analyzing trace with hash 145257767, now seen corresponding path program 1 times [2021-11-02 12:24:05,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:24:05,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052912648] [2021-11-02 12:24:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:05,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:24:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:24:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:24:05,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:24:05,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052912648] [2021-11-02 12:24:05,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052912648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:24:05,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:24:05,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 12:24:05,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530951632] [2021-11-02 12:24:05,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 12:24:05,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:24:05,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 12:24:05,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 12:24:05,619 INFO L87 Difference]: Start difference. First operand 494 states and 619 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2021-11-02 12:24:07,662 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:24:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:24:11,996 INFO L93 Difference]: Finished difference Result 975 states and 1223 transitions. [2021-11-02 12:24:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 12:24:11,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2021-11-02 12:24:11,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:24:11,999 INFO L225 Difference]: With dead ends: 975 [2021-11-02 12:24:11,999 INFO L226 Difference]: Without dead ends: 495 [2021-11-02 12:24:12,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.32ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 12:24:12,001 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5789.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6259.33ms IncrementalHoareTripleChecker+Time [2021-11-02 12:24:12,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1236 Unknown, 0 Unchecked, 17.24ms Time], IncrementalHoareTripleChecker [0 Valid, 1235 Invalid, 1 Unknown, 0 Unchecked, 6259.33ms Time] [2021-11-02 12:24:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-02 12:24:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2021-11-02 12:24:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 475 states have (on average 1.305263157894737) internal successors, (620), 494 states have internal predecessors, (620), 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) [2021-11-02 12:24:12,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 620 transitions. [2021-11-02 12:24:12,015 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 620 transitions. Word has length 58 [2021-11-02 12:24:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:24:12,016 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 620 transitions. [2021-11-02 12:24:12,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2021-11-02 12:24:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 620 transitions. [2021-11-02 12:24:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 12:24:12,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:24:12,017 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:24:12,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 12:24:12,017 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:24:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:24:12,018 INFO L85 PathProgramCache]: Analyzing trace with hash -298642907, now seen corresponding path program 1 times [2021-11-02 12:24:12,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:24:12,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624178732] [2021-11-02 12:24:12,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:12,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:24:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:24:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:24:12,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:24:12,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624178732] [2021-11-02 12:24:12,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624178732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:24:12,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:24:12,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 12:24:12,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119272352] [2021-11-02 12:24:12,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 12:24:12,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:24:12,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 12:24:12,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 12:24:12,260 INFO L87 Difference]: Start difference. First operand 495 states and 620 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-02 12:24:14,331 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:24:18,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:24:18,362 INFO L93 Difference]: Finished difference Result 958 states and 1200 transitions. [2021-11-02 12:24:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 12:24:18,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-11-02 12:24:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:24:18,365 INFO L225 Difference]: With dead ends: 958 [2021-11-02 12:24:18,365 INFO L226 Difference]: Without dead ends: 495 [2021-11-02 12:24:18,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.52ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 12:24:18,366 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 708 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5488.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.46ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5977.17ms IncrementalHoareTripleChecker+Time [2021-11-02 12:24:18,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 0 Invalid, 1128 Unknown, 0 Unchecked, 18.46ms Time], IncrementalHoareTripleChecker [8 Valid, 1119 Invalid, 1 Unknown, 0 Unchecked, 5977.17ms Time] [2021-11-02 12:24:18,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-02 12:24:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2021-11-02 12:24:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 475 states have (on average 1.2968421052631578) internal successors, (616), 494 states have internal predecessors, (616), 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) [2021-11-02 12:24:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 616 transitions. [2021-11-02 12:24:18,377 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 616 transitions. Word has length 58 [2021-11-02 12:24:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:24:18,377 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 616 transitions. [2021-11-02 12:24:18,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-02 12:24:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 616 transitions. [2021-11-02 12:24:18,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 12:24:18,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:24:18,379 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:24:18,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 12:24:18,379 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:24:18,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:24:18,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1163509497, now seen corresponding path program 1 times [2021-11-02 12:24:18,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:24:18,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582290236] [2021-11-02 12:24:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:18,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:24:18,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:24:18,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331742637] [2021-11-02 12:24:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:18,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:24:18,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:24:18,468 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) [2021-11-02 12:24:18,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 12:24:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:24:19,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 2821 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 12:24:19,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:24:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:24:19,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:24:19,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:24:19,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582290236] [2021-11-02 12:24:19,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:24:19,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331742637] [2021-11-02 12:24:19,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331742637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:24:19,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:24:19,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 12:24:19,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091760025] [2021-11-02 12:24:19,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 12:24:19,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:24:19,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 12:24:19,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 12:24:19,885 INFO L87 Difference]: Start difference. First operand 495 states and 616 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 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) [2021-11-02 12:24:21,920 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:24:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:24:25,330 INFO L93 Difference]: Finished difference Result 886 states and 1104 transitions. [2021-11-02 12:24:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 12:24:25,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 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 82 [2021-11-02 12:24:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:24:25,332 INFO L225 Difference]: With dead ends: 886 [2021-11-02 12:24:25,332 INFO L226 Difference]: Without dead ends: 495 [2021-11-02 12:24:25,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 181.93ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-02 12:24:25,334 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1903 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4769.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1903 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.01ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5211.43ms IncrementalHoareTripleChecker+Time [2021-11-02 12:24:25,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1903 Valid, 0 Invalid, 1087 Unknown, 0 Unchecked, 24.01ms Time], IncrementalHoareTripleChecker [22 Valid, 1064 Invalid, 1 Unknown, 0 Unchecked, 5211.43ms Time] [2021-11-02 12:24:25,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-02 12:24:25,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2021-11-02 12:24:25,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 475 states have (on average 1.288421052631579) internal successors, (612), 494 states have internal predecessors, (612), 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) [2021-11-02 12:24:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 612 transitions. [2021-11-02 12:24:25,343 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 612 transitions. Word has length 82 [2021-11-02 12:24:25,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:24:25,343 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 612 transitions. [2021-11-02 12:24:25,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 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) [2021-11-02 12:24:25,343 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 612 transitions. [2021-11-02 12:24:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 12:24:25,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:24:25,344 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:24:25,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-02 12:24:25,559 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 [2021-11-02 12:24:25,559 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:24:25,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:24:25,560 INFO L85 PathProgramCache]: Analyzing trace with hash -325696875, now seen corresponding path program 1 times [2021-11-02 12:24:25,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:24:25,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963435900] [2021-11-02 12:24:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:25,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:24:25,612 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:24:25,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684022026] [2021-11-02 12:24:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:25,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:24:25,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:24:25,613 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) [2021-11-02 12:24:25,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 12:24:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:24:26,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 2916 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 12:24:26,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:24:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:24:27,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:24:27,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:24:27,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963435900] [2021-11-02 12:24:27,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:24:27,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684022026] [2021-11-02 12:24:27,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684022026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:24:27,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:24:27,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 12:24:27,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346682060] [2021-11-02 12:24:27,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 12:24:27,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:24:27,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 12:24:27,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 12:24:27,017 INFO L87 Difference]: Start difference. First operand 495 states and 612 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 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) [2021-11-02 12:24:29,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:24:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:24:32,883 INFO L93 Difference]: Finished difference Result 870 states and 1076 transitions. [2021-11-02 12:24:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 12:24:32,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 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 90 [2021-11-02 12:24:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:24:32,885 INFO L225 Difference]: With dead ends: 870 [2021-11-02 12:24:32,885 INFO L226 Difference]: Without dead ends: 495 [2021-11-02 12:24:32,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 310.09ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-02 12:24:32,886 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2529 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4987.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2529 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.72ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5553.85ms IncrementalHoareTripleChecker+Time [2021-11-02 12:24:32,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2529 Valid, 0 Invalid, 1025 Unknown, 0 Unchecked, 18.72ms Time], IncrementalHoareTripleChecker [36 Valid, 988 Invalid, 1 Unknown, 0 Unchecked, 5553.85ms Time] [2021-11-02 12:24:32,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-02 12:24:32,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2021-11-02 12:24:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 475 states have (on average 1.2757894736842106) internal successors, (606), 494 states have internal predecessors, (606), 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) [2021-11-02 12:24:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 606 transitions. [2021-11-02 12:24:32,898 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 606 transitions. Word has length 90 [2021-11-02 12:24:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:24:32,899 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 606 transitions. [2021-11-02 12:24:32,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 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) [2021-11-02 12:24:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 606 transitions. [2021-11-02 12:24:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-02 12:24:32,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:24:32,900 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:24:32,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 12:24:33,115 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 [2021-11-02 12:24:33,116 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:24:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:24:33,116 INFO L85 PathProgramCache]: Analyzing trace with hash 331065649, now seen corresponding path program 1 times [2021-11-02 12:24:33,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:24:33,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583265024] [2021-11-02 12:24:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:33,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:24:33,201 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:24:33,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253967370] [2021-11-02 12:24:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:33,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:24:33,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:24:33,203 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) [2021-11-02 12:24:33,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 12:24:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:24:33,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 3011 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 12:24:33,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:24:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:24:34,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:24:34,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:24:34,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583265024] [2021-11-02 12:24:34,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:24:34,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253967370] [2021-11-02 12:24:34,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253967370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:24:34,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:24:34,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 12:24:34,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587062779] [2021-11-02 12:24:34,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 12:24:34,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:24:34,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 12:24:34,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 12:24:34,836 INFO L87 Difference]: Start difference. First operand 495 states and 606 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 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) [2021-11-02 12:24:36,875 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:24:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:24:40,532 INFO L93 Difference]: Finished difference Result 814 states and 990 transitions. [2021-11-02 12:24:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 12:24:40,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 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 98 [2021-11-02 12:24:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:24:40,535 INFO L225 Difference]: With dead ends: 814 [2021-11-02 12:24:40,535 INFO L226 Difference]: Without dead ends: 495 [2021-11-02 12:24:40,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 408.06ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-02 12:24:40,539 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3046 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 78 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4860.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3046 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.25ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5369.62ms IncrementalHoareTripleChecker+Time [2021-11-02 12:24:40,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3046 Valid, 0 Invalid, 1071 Unknown, 0 Unchecked, 14.25ms Time], IncrementalHoareTripleChecker [78 Valid, 992 Invalid, 1 Unknown, 0 Unchecked, 5369.62ms Time] [2021-11-02 12:24:40,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-02 12:24:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2021-11-02 12:24:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 475 states have (on average 1.2694736842105263) internal successors, (603), 494 states have internal predecessors, (603), 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) [2021-11-02 12:24:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 603 transitions. [2021-11-02 12:24:40,571 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 603 transitions. Word has length 98 [2021-11-02 12:24:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:24:40,572 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 603 transitions. [2021-11-02 12:24:40,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 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) [2021-11-02 12:24:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 603 transitions. [2021-11-02 12:24:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-02 12:24:40,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:24:40,573 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:24:40,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-02 12:24:40,773 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 [2021-11-02 12:24:40,774 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:24:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:24:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1838617835, now seen corresponding path program 1 times [2021-11-02 12:24:40,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:24:40,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668993254] [2021-11-02 12:24:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:40,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:24:40,831 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:24:40,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637180034] [2021-11-02 12:24:40,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:40,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:24:40,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:24:40,833 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) [2021-11-02 12:24:40,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 12:24:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:24:41,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 3106 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 12:24:41,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:24:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:24:41,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:24:41,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:24:41,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668993254] [2021-11-02 12:24:41,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:24:41,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637180034] [2021-11-02 12:24:41,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637180034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:24:41,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:24:41,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 12:24:41,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053589178] [2021-11-02 12:24:41,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 12:24:41,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:24:41,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 12:24:41,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 12:24:41,785 INFO L87 Difference]: Start difference. First operand 495 states and 603 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 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) [2021-11-02 12:24:43,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:24:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:24:52,741 INFO L93 Difference]: Finished difference Result 1163 states and 1415 transitions. [2021-11-02 12:24:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 12:24:52,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 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 106 [2021-11-02 12:24:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:24:52,744 INFO L225 Difference]: With dead ends: 1163 [2021-11-02 12:24:52,744 INFO L226 Difference]: Without dead ends: 841 [2021-11-02 12:24:52,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.86ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 12:24:52,745 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 834 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 3080 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9939.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.31ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3080 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10759.97ms IncrementalHoareTripleChecker+Time [2021-11-02 12:24:52,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 0 Invalid, 3085 Unknown, 0 Unchecked, 19.31ms Time], IncrementalHoareTripleChecker [4 Valid, 3080 Invalid, 1 Unknown, 0 Unchecked, 10759.97ms Time] [2021-11-02 12:24:52,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-11-02 12:24:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 498. [2021-11-02 12:24:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 478 states have (on average 1.2677824267782427) internal successors, (606), 497 states have internal predecessors, (606), 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) [2021-11-02 12:24:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 606 transitions. [2021-11-02 12:24:52,775 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 606 transitions. Word has length 106 [2021-11-02 12:24:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:24:52,775 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 606 transitions. [2021-11-02 12:24:52,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 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) [2021-11-02 12:24:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 606 transitions. [2021-11-02 12:24:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-02 12:24:52,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:24:52,776 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:24:52,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 12:24:52,995 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 [2021-11-02 12:24:52,995 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:24:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:24:52,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1439072551, now seen corresponding path program 1 times [2021-11-02 12:24:52,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:24:52,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445530466] [2021-11-02 12:24:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:52,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:24:53,050 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:24:53,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211914558] [2021-11-02 12:24:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:24:53,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:24:53,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:24:53,052 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) [2021-11-02 12:24:53,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 12:24:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:24:53,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 3115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 12:24:53,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:24:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:24:54,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:24:54,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:24:54,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445530466] [2021-11-02 12:24:54,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:24:54,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211914558] [2021-11-02 12:24:54,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211914558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:24:54,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:24:54,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 12:24:54,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554094991] [2021-11-02 12:24:54,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 12:24:54,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:24:54,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 12:24:54,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 12:24:54,119 INFO L87 Difference]: Start difference. First operand 498 states and 606 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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) [2021-11-02 12:24:56,163 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:25:03,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:25:03,600 INFO L93 Difference]: Finished difference Result 947 states and 1149 transitions. [2021-11-02 12:25:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 12:25:03,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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 108 [2021-11-02 12:25:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:25:03,602 INFO L225 Difference]: With dead ends: 947 [2021-11-02 12:25:03,602 INFO L226 Difference]: Without dead ends: 517 [2021-11-02 12:25:03,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.28ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 12:25:03,603 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8614.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.60ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9357.31ms IncrementalHoareTripleChecker+Time [2021-11-02 12:25:03,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 2403 Unknown, 0 Unchecked, 14.60ms Time], IncrementalHoareTripleChecker [18 Valid, 2384 Invalid, 1 Unknown, 0 Unchecked, 9357.31ms Time] [2021-11-02 12:25:03,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-02 12:25:03,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 498. [2021-11-02 12:25:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 478 states have (on average 1.2656903765690377) internal successors, (605), 497 states have internal predecessors, (605), 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) [2021-11-02 12:25:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 605 transitions. [2021-11-02 12:25:03,616 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 605 transitions. Word has length 108 [2021-11-02 12:25:03,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:25:03,616 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 605 transitions. [2021-11-02 12:25:03,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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) [2021-11-02 12:25:03,616 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 605 transitions. [2021-11-02 12:25:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-02 12:25:03,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:25:03,617 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:25:03,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 12:25:03,835 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 [2021-11-02 12:25:03,835 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:25:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:25:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1021675945, now seen corresponding path program 1 times [2021-11-02 12:25:03,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:25:03,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911610335] [2021-11-02 12:25:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:25:03,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:25:03,984 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:25:03,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133857232] [2021-11-02 12:25:03,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:25:03,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:25:03,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:25:03,985 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) [2021-11-02 12:25:03,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 12:25:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:25:04,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 3118 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 12:25:04,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:25:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:25:05,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:25:05,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:25:05,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911610335] [2021-11-02 12:25:05,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:25:05,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133857232] [2021-11-02 12:25:05,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133857232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:25:05,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:25:05,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 12:25:05,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882299147] [2021-11-02 12:25:05,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 12:25:05,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:25:05,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 12:25:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 12:25:05,328 INFO L87 Difference]: Start difference. First operand 498 states and 605 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2021-11-02 12:25:07,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:25:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:25:19,752 INFO L93 Difference]: Finished difference Result 1180 states and 1433 transitions. [2021-11-02 12:25:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 12:25:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 108 [2021-11-02 12:25:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:25:19,754 INFO L225 Difference]: With dead ends: 1180 [2021-11-02 12:25:19,754 INFO L226 Difference]: Without dead ends: 726 [2021-11-02 12:25:19,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 213.76ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 12:25:19,756 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 314 mSDsluCounter, 3041 mSDsCounter, 0 mSdLazyCounter, 3898 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13153.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.82ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3898 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14168.23ms IncrementalHoareTripleChecker+Time [2021-11-02 12:25:19,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 0 Invalid, 3901 Unknown, 0 Unchecked, 27.82ms Time], IncrementalHoareTripleChecker [2 Valid, 3898 Invalid, 1 Unknown, 0 Unchecked, 14168.23ms Time] [2021-11-02 12:25:19,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-11-02 12:25:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 498. [2021-11-02 12:25:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 478 states have (on average 1.2635983263598327) internal successors, (604), 497 states have internal predecessors, (604), 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) [2021-11-02 12:25:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 604 transitions. [2021-11-02 12:25:19,768 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 604 transitions. Word has length 108 [2021-11-02 12:25:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:25:19,769 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 604 transitions. [2021-11-02 12:25:19,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2021-11-02 12:25:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 604 transitions. [2021-11-02 12:25:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-02 12:25:19,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:25:19,770 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:25:19,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 12:25:19,987 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 [2021-11-02 12:25:19,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:25:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:25:19,988 INFO L85 PathProgramCache]: Analyzing trace with hash 454297094, now seen corresponding path program 1 times [2021-11-02 12:25:19,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:25:19,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821402724] [2021-11-02 12:25:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:25:19,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:25:20,042 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:25:20,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831594356] [2021-11-02 12:25:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:25:20,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:25:20,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:25:20,046 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) [2021-11-02 12:25:20,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 12:25:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:25:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 3140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 12:25:20,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:25:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:25:21,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:25:21,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:25:21,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821402724] [2021-11-02 12:25:21,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:25:21,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831594356] [2021-11-02 12:25:21,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831594356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:25:21,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:25:21,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 12:25:21,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653807591] [2021-11-02 12:25:21,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 12:25:21,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:25:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 12:25:21,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 12:25:21,521 INFO L87 Difference]: Start difference. First operand 498 states and 604 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 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) [2021-11-02 12:25:23,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:25:31,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:25:31,957 INFO L93 Difference]: Finished difference Result 1159 states and 1405 transitions. [2021-11-02 12:25:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 12:25:31,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 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 111 [2021-11-02 12:25:31,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:25:31,960 INFO L225 Difference]: With dead ends: 1159 [2021-11-02 12:25:31,960 INFO L226 Difference]: Without dead ends: 749 [2021-11-02 12:25:31,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 462.56ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-02 12:25:31,961 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2827 mSDsluCounter, 1877 mSDsCounter, 0 mSdLazyCounter, 2604 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9072.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2827 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.77ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2604 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9987.03ms IncrementalHoareTripleChecker+Time [2021-11-02 12:25:31,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2827 Valid, 0 Invalid, 2615 Unknown, 0 Unchecked, 24.77ms Time], IncrementalHoareTripleChecker [10 Valid, 2604 Invalid, 1 Unknown, 0 Unchecked, 9987.03ms Time] [2021-11-02 12:25:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-02 12:25:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 498. [2021-11-02 12:25:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 478 states have (on average 1.2615062761506277) internal successors, (603), 497 states have internal predecessors, (603), 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) [2021-11-02 12:25:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 603 transitions. [2021-11-02 12:25:31,974 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 603 transitions. Word has length 111 [2021-11-02 12:25:31,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:25:31,974 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 603 transitions. [2021-11-02 12:25:31,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 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) [2021-11-02 12:25:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 603 transitions. [2021-11-02 12:25:31,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-02 12:25:31,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:25:31,976 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:25:32,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 12:25:32,198 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 [2021-11-02 12:25:32,199 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:25:32,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:25:32,199 INFO L85 PathProgramCache]: Analyzing trace with hash 807385476, now seen corresponding path program 1 times [2021-11-02 12:25:32,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:25:32,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926433859] [2021-11-02 12:25:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:25:32,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:25:32,302 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:25:32,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194028434] [2021-11-02 12:25:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:25:32,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:25:32,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:25:32,319 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) [2021-11-02 12:25:32,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 12:25:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:25:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 3143 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-02 12:25:33,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:25:33,914 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 9 treesize of output 3 [2021-11-02 12:25:34,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-02 12:25:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:25:35,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:25:35,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:25:35,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926433859] [2021-11-02 12:25:35,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:25:35,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194028434] [2021-11-02 12:25:35,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194028434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:25:35,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:25:35,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-02 12:25:35,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237929792] [2021-11-02 12:25:35,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 12:25:35,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:25:35,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 12:25:35,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-02 12:25:35,435 INFO L87 Difference]: Start difference. First operand 498 states and 603 transitions. Second operand has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 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) [2021-11-02 12:25:37,474 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:26:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:26:34,949 INFO L93 Difference]: Finished difference Result 2254 states and 2758 transitions. [2021-11-02 12:26:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 12:26:34,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 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 111 [2021-11-02 12:26:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:26:34,956 INFO L225 Difference]: With dead ends: 2254 [2021-11-02 12:26:34,956 INFO L226 Difference]: Without dead ends: 1819 [2021-11-02 12:26:34,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 4190.16ms TimeCoverageRelationStatistics Valid=561, Invalid=1791, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 12:26:34,958 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 4182 mSDsluCounter, 11600 mSDsCounter, 0 mSdLazyCounter, 18560 mSolverCounterSat, 380 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51784.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4182 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 18941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 157.06ms SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 18560 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55567.75ms IncrementalHoareTripleChecker+Time [2021-11-02 12:26:34,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4182 Valid, 0 Invalid, 18941 Unknown, 0 Unchecked, 157.06ms Time], IncrementalHoareTripleChecker [380 Valid, 18560 Invalid, 1 Unknown, 0 Unchecked, 55567.75ms Time] [2021-11-02 12:26:34,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2021-11-02 12:26:34,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 928. [2021-11-02 12:26:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 908 states have (on average 1.2610132158590308) internal successors, (1145), 927 states have internal predecessors, (1145), 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) [2021-11-02 12:26:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1145 transitions. [2021-11-02 12:26:35,000 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1145 transitions. Word has length 111 [2021-11-02 12:26:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:26:35,000 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1145 transitions. [2021-11-02 12:26:35,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 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) [2021-11-02 12:26:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1145 transitions. [2021-11-02 12:26:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 12:26:35,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:26:35,002 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:26:35,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 12:26:35,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 12:26:35,227 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:26:35,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:26:35,228 INFO L85 PathProgramCache]: Analyzing trace with hash 309133258, now seen corresponding path program 1 times [2021-11-02 12:26:35,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:26:35,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804654247] [2021-11-02 12:26:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:26:35,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:26:35,286 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:26:35,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801656368] [2021-11-02 12:26:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:26:35,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:26:35,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:26:35,287 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:26:35,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 12:26:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:26:36,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 3148 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-02 12:26:36,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:26:36,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 12:26:36,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:26:36,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 12:26:36,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:26:36,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 12:26:37,089 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 12:26:37,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 12:26:37,436 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 12:26:37,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 41 [2021-11-02 12:26:37,504 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 12:26:37,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 26 [2021-11-02 12:26:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:26:38,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:26:38,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:26:38,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804654247] [2021-11-02 12:26:38,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:26:38,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801656368] [2021-11-02 12:26:38,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801656368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:26:38,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:26:38,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 12:26:38,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465539337] [2021-11-02 12:26:38,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 12:26:38,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:26:38,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 12:26:38,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-02 12:26:38,410 INFO L87 Difference]: Start difference. First operand 928 states and 1145 transitions. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 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) [2021-11-02 12:26:40,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:26:56,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:26:56,294 INFO L93 Difference]: Finished difference Result 1943 states and 2391 transitions. [2021-11-02 12:26:56,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 12:26:56,295 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 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 113 [2021-11-02 12:26:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:26:56,298 INFO L225 Difference]: With dead ends: 1943 [2021-11-02 12:26:56,298 INFO L226 Difference]: Without dead ends: 1067 [2021-11-02 12:26:56,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1182.76ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-11-02 12:26:56,303 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 129 mSDsluCounter, 2635 mSDsCounter, 0 mSdLazyCounter, 4419 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15275.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.57ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 4419 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17080.11ms IncrementalHoareTripleChecker+Time [2021-11-02 12:26:56,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 0 Invalid, 4446 Unknown, 0 Unchecked, 32.57ms Time], IncrementalHoareTripleChecker [26 Valid, 4419 Invalid, 1 Unknown, 0 Unchecked, 17080.11ms Time] [2021-11-02 12:26:56,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-11-02 12:26:56,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1037. [2021-11-02 12:26:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1017 states have (on average 1.247787610619469) internal successors, (1269), 1036 states have internal predecessors, (1269), 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) [2021-11-02 12:26:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1269 transitions. [2021-11-02 12:26:56,329 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1269 transitions. Word has length 113 [2021-11-02 12:26:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:26:56,330 INFO L470 AbstractCegarLoop]: Abstraction has 1037 states and 1269 transitions. [2021-11-02 12:26:56,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 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) [2021-11-02 12:26:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1269 transitions. [2021-11-02 12:26:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 12:26:56,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:26:56,331 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:26:56,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-02 12:26:56,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:26:56,550 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:26:56,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:26:56,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1910204364, now seen corresponding path program 1 times [2021-11-02 12:26:56,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:26:56,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145680708] [2021-11-02 12:26:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:26:56,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:26:56,633 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:26:56,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381440820] [2021-11-02 12:26:56,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:26:56,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:26:56,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:26:56,650 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:26:56,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 12:26:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:26:57,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 3143 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 12:26:57,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:26:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:26:57,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:26:57,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:26:57,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145680708] [2021-11-02 12:26:57,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:26:57,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381440820] [2021-11-02 12:26:57,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381440820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:26:57,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:26:57,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 12:26:57,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945699815] [2021-11-02 12:26:57,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 12:26:57,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:26:57,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 12:26:57,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 12:26:57,907 INFO L87 Difference]: Start difference. First operand 1037 states and 1269 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-11-02 12:26:59,945 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:27:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:27:10,106 INFO L93 Difference]: Finished difference Result 2547 states and 3115 transitions. [2021-11-02 12:27:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 12:27:10,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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 113 [2021-11-02 12:27:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:27:10,111 INFO L225 Difference]: With dead ends: 2547 [2021-11-02 12:27:10,111 INFO L226 Difference]: Without dead ends: 1610 [2021-11-02 12:27:10,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 210.27ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 12:27:10,112 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 398 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 3307 mSolverCounterSat, 129 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10813.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.39ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3307 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11914.01ms IncrementalHoareTripleChecker+Time [2021-11-02 12:27:10,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 0 Invalid, 3437 Unknown, 0 Unchecked, 18.39ms Time], IncrementalHoareTripleChecker [129 Valid, 3307 Invalid, 1 Unknown, 0 Unchecked, 11914.01ms Time] [2021-11-02 12:27:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-11-02 12:27:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1117. [2021-11-02 12:27:10,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1097 states have (on average 1.244302643573382) internal successors, (1365), 1116 states have internal predecessors, (1365), 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) [2021-11-02 12:27:10,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1365 transitions. [2021-11-02 12:27:10,141 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1365 transitions. Word has length 113 [2021-11-02 12:27:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:27:10,141 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 1365 transitions. [2021-11-02 12:27:10,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-11-02 12:27:10,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1365 transitions. [2021-11-02 12:27:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 12:27:10,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:27:10,142 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:27:10,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 12:27:10,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 12:27:10,366 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:27:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:27:10,366 INFO L85 PathProgramCache]: Analyzing trace with hash 291229450, now seen corresponding path program 1 times [2021-11-02 12:27:10,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:27:10,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898065888] [2021-11-02 12:27:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:27:10,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:27:10,417 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:27:10,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005908099] [2021-11-02 12:27:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:27:10,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:27:10,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:27:10,418 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:27:10,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 12:27:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:27:11,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 3148 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 12:27:11,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:27:11,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:27:11,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 12:27:11,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 12:27:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:27:12,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:27:12,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:27:12,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898065888] [2021-11-02 12:27:12,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:27:12,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005908099] [2021-11-02 12:27:12,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005908099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:27:12,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:27:12,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 12:27:12,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427885518] [2021-11-02 12:27:12,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 12:27:12,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:27:12,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 12:27:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-02 12:27:12,102 INFO L87 Difference]: Start difference. First operand 1117 states and 1365 transitions. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 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) [2021-11-02 12:27:14,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:27:33,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:27:33,100 INFO L93 Difference]: Finished difference Result 3188 states and 3894 transitions. [2021-11-02 12:27:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 12:27:33,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 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 113 [2021-11-02 12:27:33,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:27:33,106 INFO L225 Difference]: With dead ends: 3188 [2021-11-02 12:27:33,106 INFO L226 Difference]: Without dead ends: 2156 [2021-11-02 12:27:33,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 483.63ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-02 12:27:33,108 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1285 mSDsluCounter, 3945 mSDsCounter, 0 mSdLazyCounter, 6905 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18600.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.10ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 6905 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20523.13ms IncrementalHoareTripleChecker+Time [2021-11-02 12:27:33,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1285 Valid, 0 Invalid, 6959 Unknown, 0 Unchecked, 37.10ms Time], IncrementalHoareTripleChecker [53 Valid, 6905 Invalid, 1 Unknown, 0 Unchecked, 20523.13ms Time] [2021-11-02 12:27:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-11-02 12:27:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1958. [2021-11-02 12:27:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1938 states have (on average 1.256965944272446) internal successors, (2436), 1957 states have internal predecessors, (2436), 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) [2021-11-02 12:27:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2436 transitions. [2021-11-02 12:27:33,159 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2436 transitions. Word has length 113 [2021-11-02 12:27:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:27:33,159 INFO L470 AbstractCegarLoop]: Abstraction has 1958 states and 2436 transitions. [2021-11-02 12:27:33,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 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) [2021-11-02 12:27:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2436 transitions. [2021-11-02 12:27:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-02 12:27:33,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:27:33,161 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:27:33,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 12:27:33,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 12:27:33,385 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:27:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:27:33,385 INFO L85 PathProgramCache]: Analyzing trace with hash 857100487, now seen corresponding path program 1 times [2021-11-02 12:27:33,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:27:33,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725525816] [2021-11-02 12:27:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:27:33,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:27:33,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:27:33,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130617751] [2021-11-02 12:27:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:27:33,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:27:33,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:27:33,437 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:27:33,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 12:27:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:27:34,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 3162 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 12:27:34,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:27:35,148 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 29 treesize of output 21 [2021-11-02 12:27:35,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-02 12:27:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:27:35,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:27:35,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:27:35,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725525816] [2021-11-02 12:27:35,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:27:35,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130617751] [2021-11-02 12:27:35,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130617751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:27:35,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:27:35,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 12:27:35,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511868679] [2021-11-02 12:27:35,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 12:27:35,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:27:35,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 12:27:35,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 12:27:35,437 INFO L87 Difference]: Start difference. First operand 1958 states and 2436 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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) [2021-11-02 12:27:38,153 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:28:17,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:28:17,378 INFO L93 Difference]: Finished difference Result 6541 states and 8115 transitions. [2021-11-02 12:28:17,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 12:28:17,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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 114 [2021-11-02 12:28:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:28:17,393 INFO L225 Difference]: With dead ends: 6541 [2021-11-02 12:28:17,393 INFO L226 Difference]: Without dead ends: 4781 [2021-11-02 12:28:17,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2677.65ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-11-02 12:28:17,398 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1989 mSDsluCounter, 6140 mSDsCounter, 0 mSdLazyCounter, 10486 mSolverCounterSat, 85 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34803.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1989 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 89.83ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 10486 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38948.45ms IncrementalHoareTripleChecker+Time [2021-11-02 12:28:17,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1989 Valid, 0 Invalid, 10572 Unknown, 0 Unchecked, 89.83ms Time], IncrementalHoareTripleChecker [85 Valid, 10486 Invalid, 1 Unknown, 0 Unchecked, 38948.45ms Time] [2021-11-02 12:28:17,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4781 states. [2021-11-02 12:28:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4781 to 3247. [2021-11-02 12:28:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3227 states have (on average 1.2630926557173845) internal successors, (4076), 3246 states have internal predecessors, (4076), 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) [2021-11-02 12:28:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 4076 transitions. [2021-11-02 12:28:17,502 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 4076 transitions. Word has length 114 [2021-11-02 12:28:17,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:28:17,503 INFO L470 AbstractCegarLoop]: Abstraction has 3247 states and 4076 transitions. [2021-11-02 12:28:17,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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) [2021-11-02 12:28:17,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 4076 transitions. [2021-11-02 12:28:17,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-02 12:28:17,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:28:17,528 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:28:17,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-02 12:28:17,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 12:28:17,752 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:28:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:28:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1049302779, now seen corresponding path program 1 times [2021-11-02 12:28:17,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:28:17,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405200348] [2021-11-02 12:28:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:28:17,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:28:17,799 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:28:17,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391905903] [2021-11-02 12:28:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:28:17,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:28:17,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:28:17,801 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:28:17,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 12:28:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:28:18,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 3157 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 12:28:18,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:28:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:28:18,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:28:18,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:28:18,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405200348] [2021-11-02 12:28:18,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:28:18,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391905903] [2021-11-02 12:28:18,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391905903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:28:18,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:28:18,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 12:28:18,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768252896] [2021-11-02 12:28:18,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 12:28:18,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:28:18,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 12:28:18,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 12:28:18,780 INFO L87 Difference]: Start difference. First operand 3247 states and 4076 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2021-11-02 12:28:21,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:28:26,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:28:26,541 INFO L93 Difference]: Finished difference Result 6068 states and 7594 transitions. [2021-11-02 12:28:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 12:28:26,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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 114 [2021-11-02 12:28:26,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:28:26,549 INFO L225 Difference]: With dead ends: 6068 [2021-11-02 12:28:26,549 INFO L226 Difference]: Without dead ends: 3402 [2021-11-02 12:28:26,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.11ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 12:28:26,552 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 73 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6701.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.04ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7556.90ms IncrementalHoareTripleChecker+Time [2021-11-02 12:28:26,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 1939 Unknown, 0 Unchecked, 8.04ms Time], IncrementalHoareTripleChecker [73 Valid, 1865 Invalid, 1 Unknown, 0 Unchecked, 7556.90ms Time] [2021-11-02 12:28:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2021-11-02 12:28:26,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3177. [2021-11-02 12:28:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3157 states have (on average 1.244535951853025) internal successors, (3929), 3176 states have internal predecessors, (3929), 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) [2021-11-02 12:28:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 3929 transitions. [2021-11-02 12:28:26,664 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 3929 transitions. Word has length 114 [2021-11-02 12:28:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:28:26,664 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 3929 transitions. [2021-11-02 12:28:26,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2021-11-02 12:28:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 3929 transitions. [2021-11-02 12:28:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-02 12:28:26,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:28:26,667 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:28:26,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 12:28:26,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 12:28:26,883 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:28:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:28:26,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1748521480, now seen corresponding path program 1 times [2021-11-02 12:28:26,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:28:26,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263079998] [2021-11-02 12:28:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:28:26,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:28:27,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:28:27,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631640064] [2021-11-02 12:28:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:28:27,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:28:27,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:28:27,030 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:28:27,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 12:28:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:28:27,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 3153 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 12:28:27,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:28:28,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-11-02 12:28:28,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-11-02 12:28:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:28:29,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:28:29,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:28:29,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263079998] [2021-11-02 12:28:29,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:28:29,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631640064] [2021-11-02 12:28:29,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631640064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:28:29,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:28:29,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-02 12:28:29,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89961530] [2021-11-02 12:28:29,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 12:28:29,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:28:29,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 12:28:29,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-02 12:28:29,300 INFO L87 Difference]: Start difference. First operand 3177 states and 3929 transitions. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 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) [2021-11-02 12:28:31,916 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:29:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:29:00,026 INFO L93 Difference]: Finished difference Result 5074 states and 6219 transitions. [2021-11-02 12:29:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 12:29:00,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 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 115 [2021-11-02 12:29:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:29:00,035 INFO L225 Difference]: With dead ends: 5074 [2021-11-02 12:29:00,035 INFO L226 Difference]: Without dead ends: 3326 [2021-11-02 12:29:00,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1851.18ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-02 12:29:00,037 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1403 mSDsluCounter, 4959 mSDsCounter, 0 mSdLazyCounter, 8029 mSolverCounterSat, 143 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25844.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1403 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 59.62ms SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 8029 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28901.22ms IncrementalHoareTripleChecker+Time [2021-11-02 12:29:00,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1403 Valid, 0 Invalid, 8173 Unknown, 0 Unchecked, 59.62ms Time], IncrementalHoareTripleChecker [143 Valid, 8029 Invalid, 1 Unknown, 0 Unchecked, 28901.22ms Time] [2021-11-02 12:29:00,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-11-02 12:29:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2291. [2021-11-02 12:29:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2271 states have (on average 1.2439453985028621) internal successors, (2825), 2290 states have internal predecessors, (2825), 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) [2021-11-02 12:29:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 2825 transitions. [2021-11-02 12:29:00,098 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 2825 transitions. Word has length 115 [2021-11-02 12:29:00,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:29:00,098 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 2825 transitions. [2021-11-02 12:29:00,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 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) [2021-11-02 12:29:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 2825 transitions. [2021-11-02 12:29:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-02 12:29:00,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:29:00,100 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:29:00,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-02 12:29:00,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:29:00,313 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:29:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:29:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1659959392, now seen corresponding path program 1 times [2021-11-02 12:29:00,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:29:00,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90614680] [2021-11-02 12:29:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:29:00,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:29:00,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:29:00,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210687670] [2021-11-02 12:29:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:29:00,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:29:00,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:29:00,372 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:29:00,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 12:29:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:29:01,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 3162 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-02 12:29:01,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:29:01,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 12:29:01,763 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 12:29:01,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 12:29:01,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-02 12:29:02,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:29:02,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-11-02 12:29:02,447 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-02 12:29:02,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-02 12:29:02,635 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 12:29:02,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 26 [2021-11-02 12:29:03,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-11-02 12:29:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:29:04,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:29:04,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:29:04,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90614680] [2021-11-02 12:29:04,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:29:04,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210687670] [2021-11-02 12:29:04,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210687670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:29:04,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:29:04,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-02 12:29:04,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402436647] [2021-11-02 12:29:04,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 12:29:04,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:29:04,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 12:29:04,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-02 12:29:04,108 INFO L87 Difference]: Start difference. First operand 2291 states and 2825 transitions. Second operand has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 13 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) [2021-11-02 12:29:06,153 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:29:44,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:29:44,681 INFO L93 Difference]: Finished difference Result 3785 states and 4611 transitions. [2021-11-02 12:29:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 12:29:44,683 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 13 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) Word has length 116 [2021-11-02 12:29:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:29:44,688 INFO L225 Difference]: With dead ends: 3785 [2021-11-02 12:29:44,688 INFO L226 Difference]: Without dead ends: 2062 [2021-11-02 12:29:44,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2593.47ms TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2021-11-02 12:29:44,691 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 886 mSDsluCounter, 7677 mSDsCounter, 0 mSdLazyCounter, 11879 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33978.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 76.84ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 11879 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38246.85ms IncrementalHoareTripleChecker+Time [2021-11-02 12:29:44,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 0 Invalid, 11991 Unknown, 0 Unchecked, 76.84ms Time], IncrementalHoareTripleChecker [111 Valid, 11879 Invalid, 1 Unknown, 0 Unchecked, 38246.85ms Time] [2021-11-02 12:29:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-11-02 12:29:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1871. [2021-11-02 12:29:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1851 states have (on average 1.2431118314424636) internal successors, (2301), 1870 states have internal predecessors, (2301), 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) [2021-11-02 12:29:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2301 transitions. [2021-11-02 12:29:44,743 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2301 transitions. Word has length 116 [2021-11-02 12:29:44,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:29:44,743 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 2301 transitions. [2021-11-02 12:29:44,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 13 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) [2021-11-02 12:29:44,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2301 transitions. [2021-11-02 12:29:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-02 12:29:44,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:29:44,745 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:29:44,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-02 12:29:44,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 12:29:44,966 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:29:44,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:29:44,966 INFO L85 PathProgramCache]: Analyzing trace with hash 256441643, now seen corresponding path program 1 times [2021-11-02 12:29:44,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:29:44,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257027798] [2021-11-02 12:29:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:29:44,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:29:45,039 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:29:45,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743336852] [2021-11-02 12:29:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:29:45,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:29:45,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:29:45,041 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:29:45,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 12:29:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:29:45,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 12:29:45,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:29:46,727 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 [2021-11-02 12:29:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:29:47,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:29:47,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:29:47,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257027798] [2021-11-02 12:29:47,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:29:47,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743336852] [2021-11-02 12:29:47,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743336852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:29:47,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:29:47,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 12:29:47,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45140476] [2021-11-02 12:29:47,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 12:29:47,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:29:47,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 12:29:47,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 12:29:47,013 INFO L87 Difference]: Start difference. First operand 1871 states and 2301 transitions. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2021-11-02 12:29:49,606 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:30:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:30:17,094 INFO L93 Difference]: Finished difference Result 5633 states and 6859 transitions. [2021-11-02 12:30:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 12:30:17,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 119 [2021-11-02 12:30:17,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:30:17,113 INFO L225 Difference]: With dead ends: 5633 [2021-11-02 12:30:17,118 INFO L226 Difference]: Without dead ends: 4710 [2021-11-02 12:30:17,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 624.66ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-11-02 12:30:17,121 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2363 mSDsluCounter, 3163 mSDsCounter, 0 mSdLazyCounter, 6628 mSolverCounterSat, 73 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25841.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2363 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 60.92ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 6628 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29121.73ms IncrementalHoareTripleChecker+Time [2021-11-02 12:30:17,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2363 Valid, 0 Invalid, 6702 Unknown, 0 Unchecked, 60.92ms Time], IncrementalHoareTripleChecker [73 Valid, 6628 Invalid, 1 Unknown, 0 Unchecked, 29121.73ms Time] [2021-11-02 12:30:17,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2021-11-02 12:30:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 1888. [2021-11-02 12:30:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1868 states have (on average 1.2403640256959314) internal successors, (2317), 1887 states have internal predecessors, (2317), 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) [2021-11-02 12:30:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2317 transitions. [2021-11-02 12:30:17,197 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2317 transitions. Word has length 119 [2021-11-02 12:30:17,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:30:17,197 INFO L470 AbstractCegarLoop]: Abstraction has 1888 states and 2317 transitions. [2021-11-02 12:30:17,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2021-11-02 12:30:17,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2317 transitions. [2021-11-02 12:30:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-02 12:30:17,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:30:17,199 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:30:17,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 12:30:17,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:30:17,427 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:30:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:30:17,427 INFO L85 PathProgramCache]: Analyzing trace with hash -539957781, now seen corresponding path program 1 times [2021-11-02 12:30:17,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:30:17,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503493604] [2021-11-02 12:30:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:30:17,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:30:17,498 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:30:17,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337437259] [2021-11-02 12:30:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:30:17,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:30:17,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:30:17,500 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:30:17,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 12:30:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:30:18,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 176 conjunts are in the unsatisfiable core [2021-11-02 12:30:18,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:30:18,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 12:30:18,736 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 12:30:18,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 12:30:18,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-02 12:30:19,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:30:19,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-11-02 12:30:19,242 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-02 12:30:19,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-02 12:30:19,387 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 12:30:19,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 26 [2021-11-02 12:30:19,946 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 12:30:19,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-02 12:30:20,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:30:20,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-11-02 12:30:20,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:30:20,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-11-02 12:30:20,593 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 12:30:20,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 12:30:20,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:30:20,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-11-02 12:30:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:30:21,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:30:21,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:30:21,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503493604] [2021-11-02 12:30:21,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:30:21,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337437259] [2021-11-02 12:30:21,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337437259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:30:21,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:30:21,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-02 12:30:21,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795364530] [2021-11-02 12:30:21,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 12:30:21,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:30:21,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 12:30:21,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-02 12:30:21,745 INFO L87 Difference]: Start difference. First operand 1888 states and 2317 transitions. Second operand has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 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) [2021-11-02 12:30:24,319 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:30:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:30:59,951 INFO L93 Difference]: Finished difference Result 4536 states and 5566 transitions. [2021-11-02 12:30:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 12:30:59,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 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 119 [2021-11-02 12:30:59,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:30:59,963 INFO L225 Difference]: With dead ends: 4536 [2021-11-02 12:30:59,964 INFO L226 Difference]: Without dead ends: 3668 [2021-11-02 12:30:59,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2693.62ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-11-02 12:30:59,965 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 773 mSDsluCounter, 6463 mSDsCounter, 0 mSdLazyCounter, 8694 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30981.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 76.13ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 8694 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 1176 IncrementalHoareTripleChecker+Unchecked, 36183.16ms IncrementalHoareTripleChecker+Time [2021-11-02 12:30:59,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 0 Invalid, 9951 Unknown, 0 Unchecked, 76.13ms Time], IncrementalHoareTripleChecker [80 Valid, 8694 Invalid, 1 Unknown, 1176 Unchecked, 36183.16ms Time] [2021-11-02 12:30:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3668 states. [2021-11-02 12:31:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3668 to 1866. [2021-11-02 12:31:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1846 states have (on average 1.2416034669555795) internal successors, (2292), 1865 states have internal predecessors, (2292), 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) [2021-11-02 12:31:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 2292 transitions. [2021-11-02 12:31:00,046 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 2292 transitions. Word has length 119 [2021-11-02 12:31:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:31:00,046 INFO L470 AbstractCegarLoop]: Abstraction has 1866 states and 2292 transitions. [2021-11-02 12:31:00,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 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) [2021-11-02 12:31:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 2292 transitions. [2021-11-02 12:31:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-02 12:31:00,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:31:00,066 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:31:00,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 12:31:00,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:31:00,292 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:31:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:31:00,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1105890836, now seen corresponding path program 1 times [2021-11-02 12:31:00,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:31:00,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288275122] [2021-11-02 12:31:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:31:00,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:31:00,337 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:31:00,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753911847] [2021-11-02 12:31:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:31:00,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:31:00,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:31:00,339 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:31:00,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 12:31:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:31:01,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 3172 conjuncts, 150 conjunts are in the unsatisfiable core [2021-11-02 12:31:01,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:31:01,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 12:31:01,639 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 12:31:01,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-02 12:31:01,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 12:31:02,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:31:02,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 12:31:02,264 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 12:31:02,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 12:31:02,487 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 12:31:02,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-02 12:31:02,614 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 9 treesize of output 3 [2021-11-02 12:31:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:31:03,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-02 12:31:04,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 24 [2021-11-02 12:31:04,105 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-02 12:31:04,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-11-02 12:31:05,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-11-02 12:31:05,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-02 12:31:05,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 12:31:05,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 12:31:05,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-02 12:31:05,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 12:31:05,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 12:31:05,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 34 [2021-11-02 12:31:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:31:05,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:31:05,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:31:05,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288275122] [2021-11-02 12:31:05,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:31:05,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753911847] [2021-11-02 12:31:05,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753911847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:31:05,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:31:05,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-02 12:31:05,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770083002] [2021-11-02 12:31:05,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 12:31:05,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:31:05,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 12:31:05,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-11-02 12:31:05,845 INFO L87 Difference]: Start difference. First operand 1866 states and 2292 transitions. Second operand has 26 states, 26 states have (on average 4.615384615384615) internal successors, (120), 26 states have internal predecessors, (120), 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) [2021-11-02 12:31:08,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:32:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:32:49,374 INFO L93 Difference]: Finished difference Result 5229 states and 6388 transitions. [2021-11-02 12:32:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-02 12:32:49,374 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.615384615384615) internal successors, (120), 26 states have internal predecessors, (120), 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 120 [2021-11-02 12:32:49,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:32:49,380 INFO L225 Difference]: With dead ends: 5229 [2021-11-02 12:32:49,380 INFO L226 Difference]: Without dead ends: 4042 [2021-11-02 12:32:49,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 11942.14ms TimeCoverageRelationStatistics Valid=850, Invalid=5156, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 12:32:49,382 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2712 mSDsluCounter, 17219 mSDsCounter, 0 mSdLazyCounter, 25956 mSolverCounterSat, 396 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79205.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2712 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 194.49ms SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 25956 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92641.02ms IncrementalHoareTripleChecker+Time [2021-11-02 12:32:49,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2712 Valid, 0 Invalid, 26353 Unknown, 0 Unchecked, 194.49ms Time], IncrementalHoareTripleChecker [396 Valid, 25956 Invalid, 1 Unknown, 0 Unchecked, 92641.02ms Time] [2021-11-02 12:32:49,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4042 states. [2021-11-02 12:32:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4042 to 2685. [2021-11-02 12:32:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2665 states have (on average 1.2356472795497186) internal successors, (3293), 2684 states have internal predecessors, (3293), 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) [2021-11-02 12:32:49,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 3293 transitions. [2021-11-02 12:32:49,469 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 3293 transitions. Word has length 120 [2021-11-02 12:32:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:32:49,469 INFO L470 AbstractCegarLoop]: Abstraction has 2685 states and 3293 transitions. [2021-11-02 12:32:49,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.615384615384615) internal successors, (120), 26 states have internal predecessors, (120), 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) [2021-11-02 12:32:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 3293 transitions. [2021-11-02 12:32:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-02 12:32:49,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:32:49,471 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:32:49,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-02 12:32:49,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:32:49,687 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:32:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:32:49,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2107654828, now seen corresponding path program 1 times [2021-11-02 12:32:49,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:32:49,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651992118] [2021-11-02 12:32:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:32:49,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:32:49,732 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:32:49,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960758431] [2021-11-02 12:32:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:32:49,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:32:49,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:32:49,734 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:32:49,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 12:32:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:32:50,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 3172 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 12:32:50,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:32:51,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-02 12:32:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:32:51,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:32:51,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:32:51,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651992118] [2021-11-02 12:32:51,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:32:51,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960758431] [2021-11-02 12:32:51,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960758431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:32:51,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:32:51,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 12:32:51,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059986505] [2021-11-02 12:32:51,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 12:32:51,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:32:51,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 12:32:51,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-02 12:32:51,680 INFO L87 Difference]: Start difference. First operand 2685 states and 3293 transitions. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2021-11-02 12:32:54,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.83s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:33:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:33:16,314 INFO L93 Difference]: Finished difference Result 5630 states and 6890 transitions. [2021-11-02 12:33:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 12:33:16,315 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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 120 [2021-11-02 12:33:16,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:33:16,320 INFO L225 Difference]: With dead ends: 5630 [2021-11-02 12:33:16,320 INFO L226 Difference]: Without dead ends: 3622 [2021-11-02 12:33:16,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 987.70ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-02 12:33:16,322 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1333 mSDsluCounter, 4264 mSDsCounter, 0 mSdLazyCounter, 7588 mSolverCounterSat, 83 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20794.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1333 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.90ms SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 7588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23594.99ms IncrementalHoareTripleChecker+Time [2021-11-02 12:33:16,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1333 Valid, 0 Invalid, 7672 Unknown, 0 Unchecked, 42.90ms Time], IncrementalHoareTripleChecker [83 Valid, 7588 Invalid, 1 Unknown, 0 Unchecked, 23594.99ms Time] [2021-11-02 12:33:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3622 states. [2021-11-02 12:33:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3622 to 3024. [2021-11-02 12:33:16,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 3004 states have (on average 1.237017310252996) internal successors, (3716), 3023 states have internal predecessors, (3716), 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) [2021-11-02 12:33:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 3716 transitions. [2021-11-02 12:33:16,451 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 3716 transitions. Word has length 120 [2021-11-02 12:33:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:33:16,451 INFO L470 AbstractCegarLoop]: Abstraction has 3024 states and 3716 transitions. [2021-11-02 12:33:16,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2021-11-02 12:33:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 3716 transitions. [2021-11-02 12:33:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-02 12:33:16,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:33:16,453 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:33:16,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 12:33:16,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:33:16,657 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:33:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:33:16,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1703207212, now seen corresponding path program 1 times [2021-11-02 12:33:16,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:33:16,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050504629] [2021-11-02 12:33:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:33:16,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:33:16,743 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:33:16,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796767097] [2021-11-02 12:33:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:33:16,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:33:16,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:33:16,768 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:33:16,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 12:33:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:33:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 3172 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-02 12:33:17,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:33:18,950 INFO L354 Elim1Store]: treesize reduction 23, result has 45.2 percent of original size [2021-11-02 12:33:18,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 33 [2021-11-02 12:33:19,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 12:33:20,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-02 12:33:22,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 12:33:22,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 12:33:22,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 12:33:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:33:22,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:33:22,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:33:22,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050504629] [2021-11-02 12:33:22,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:33:22,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796767097] [2021-11-02 12:33:22,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796767097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:33:22,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:33:22,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-02 12:33:22,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596712858] [2021-11-02 12:33:22,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 12:33:22,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:33:22,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 12:33:22,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=126, Unknown=1, NotChecked=0, Total=156 [2021-11-02 12:33:22,790 INFO L87 Difference]: Start difference. First operand 3024 states and 3716 transitions. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 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) [2021-11-02 12:33:24,835 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:34:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:34:03,503 INFO L93 Difference]: Finished difference Result 6475 states and 7947 transitions. [2021-11-02 12:34:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 12:34:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 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 120 [2021-11-02 12:34:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:34:03,510 INFO L225 Difference]: With dead ends: 6475 [2021-11-02 12:34:03,510 INFO L226 Difference]: Without dead ends: 4507 [2021-11-02 12:34:03,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 5470.32ms TimeCoverageRelationStatistics Valid=278, Invalid=911, Unknown=1, NotChecked=0, Total=1190 [2021-11-02 12:34:03,512 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1833 mSDsluCounter, 6997 mSDsCounter, 0 mSdLazyCounter, 11697 mSolverCounterSat, 92 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33367.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1833 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 76.15ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 11697 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37783.96ms IncrementalHoareTripleChecker+Time [2021-11-02 12:34:03,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1833 Valid, 0 Invalid, 11790 Unknown, 0 Unchecked, 76.15ms Time], IncrementalHoareTripleChecker [92 Valid, 11697 Invalid, 1 Unknown, 0 Unchecked, 37783.96ms Time] [2021-11-02 12:34:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-11-02 12:34:03,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3765. [2021-11-02 12:34:03,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3765 states, 3745 states have (on average 1.2389853137516689) internal successors, (4640), 3764 states have internal predecessors, (4640), 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) [2021-11-02 12:34:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 4640 transitions. [2021-11-02 12:34:03,688 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 4640 transitions. Word has length 120 [2021-11-02 12:34:03,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:34:03,688 INFO L470 AbstractCegarLoop]: Abstraction has 3765 states and 4640 transitions. [2021-11-02 12:34:03,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 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) [2021-11-02 12:34:03,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 4640 transitions. [2021-11-02 12:34:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-02 12:34:03,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:34:03,690 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:34:03,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-02 12:34:03,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 12:34:03,904 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:34:03,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:34:03,904 INFO L85 PathProgramCache]: Analyzing trace with hash 311526693, now seen corresponding path program 1 times [2021-11-02 12:34:03,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:34:03,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051057111] [2021-11-02 12:34:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:34:03,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:34:03,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:34:03,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197547234] [2021-11-02 12:34:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:34:03,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:34:03,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:34:03,948 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:34:03,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 12:34:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:34:04,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 163 conjunts are in the unsatisfiable core [2021-11-02 12:34:04,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:34:05,490 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 12:34:05,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-02 12:34:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:34:05,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 12:34:05,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:34:05,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-02 12:34:05,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:34:05,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 12:34:05,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:34:05,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 82 [2021-11-02 12:34:05,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 12:34:06,090 INFO L354 Elim1Store]: treesize reduction 74, result has 38.8 percent of original size [2021-11-02 12:34:06,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 117 [2021-11-02 12:34:06,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:34:06,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 112 [2021-11-02 12:34:07,049 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 12:34:07,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 84 [2021-11-02 12:34:07,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:34:07,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 118 [2021-11-02 12:34:07,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:34:07,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 12:34:07,711 INFO L354 Elim1Store]: treesize reduction 112, result has 23.8 percent of original size [2021-11-02 12:34:07,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 127 treesize of output 148 [2021-11-02 12:34:07,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:34:07,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 119 [2021-11-02 12:34:17,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:34:17,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 12:34:17,307 INFO L354 Elim1Store]: treesize reduction 26, result has 71.4 percent of original size [2021-11-02 12:34:17,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 138 treesize of output 157 [2021-11-02 12:34:18,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-11-02 12:34:18,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-02 12:34:19,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-11-02 12:34:19,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-02 12:34:19,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 12:34:19,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 12:34:19,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-02 12:34:19,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 12:34:19,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 12:34:19,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 34 [2021-11-02 12:34:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:34:19,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:34:19,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:34:19,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051057111] [2021-11-02 12:34:19,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:34:19,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197547234] [2021-11-02 12:34:19,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197547234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:34:19,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:34:19,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-02 12:34:19,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448501694] [2021-11-02 12:34:19,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 12:34:19,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:34:19,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 12:34:19,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=347, Unknown=1, NotChecked=0, Total=420 [2021-11-02 12:34:19,788 INFO L87 Difference]: Start difference. First operand 3765 states and 4640 transitions. Second operand has 21 states, 21 states have (on average 5.761904761904762) internal successors, (121), 21 states have internal predecessors, (121), 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) [2021-11-02 12:34:22,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:34:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:34:52,748 INFO L93 Difference]: Finished difference Result 6615 states and 8155 transitions. [2021-11-02 12:34:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 12:34:52,748 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.761904761904762) internal successors, (121), 21 states have internal predecessors, (121), 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 121 [2021-11-02 12:34:52,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:34:52,756 INFO L225 Difference]: With dead ends: 6615 [2021-11-02 12:34:52,756 INFO L226 Difference]: Without dead ends: 5802 [2021-11-02 12:34:52,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5159.36ms TimeCoverageRelationStatistics Valid=102, Invalid=497, Unknown=1, NotChecked=0, Total=600 [2021-11-02 12:34:52,758 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1000 mSDsluCounter, 5280 mSDsCounter, 0 mSdLazyCounter, 6425 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26383.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.76ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 6425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 2314 IncrementalHoareTripleChecker+Unchecked, 31782.94ms IncrementalHoareTripleChecker+Time [2021-11-02 12:34:52,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 0 Invalid, 8803 Unknown, 0 Unchecked, 61.76ms Time], IncrementalHoareTripleChecker [63 Valid, 6425 Invalid, 1 Unknown, 2314 Unchecked, 31782.94ms Time] [2021-11-02 12:34:52,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5802 states. [2021-11-02 12:34:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5802 to 3863. [2021-11-02 12:34:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3843 states have (on average 1.2365339578454333) internal successors, (4752), 3862 states have internal predecessors, (4752), 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) [2021-11-02 12:34:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 4752 transitions. [2021-11-02 12:34:52,943 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 4752 transitions. Word has length 121 [2021-11-02 12:34:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:34:52,944 INFO L470 AbstractCegarLoop]: Abstraction has 3863 states and 4752 transitions. [2021-11-02 12:34:52,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.761904761904762) internal successors, (121), 21 states have internal predecessors, (121), 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) [2021-11-02 12:34:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 4752 transitions. [2021-11-02 12:34:52,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-02 12:34:52,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:34:52,946 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:34:52,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-02 12:34:53,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 12:34:53,163 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:34:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:34:53,164 INFO L85 PathProgramCache]: Analyzing trace with hash -181099481, now seen corresponding path program 1 times [2021-11-02 12:34:53,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:34:53,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820720183] [2021-11-02 12:34:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:34:53,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:34:53,219 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:34:53,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401549609] [2021-11-02 12:34:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:34:53,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:34:53,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:34:53,220 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:34:53,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 12:34:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:34:53,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 12:34:53,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:34:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:34:54,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:34:54,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:34:54,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820720183] [2021-11-02 12:34:54,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:34:54,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401549609] [2021-11-02 12:34:54,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401549609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:34:54,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:34:54,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 12:34:54,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946581954] [2021-11-02 12:34:54,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 12:34:54,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:34:54,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 12:34:54,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 12:34:54,394 INFO L87 Difference]: Start difference. First operand 3863 states and 4752 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 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) [2021-11-02 12:34:57,100 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:35:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:35:08,171 INFO L93 Difference]: Finished difference Result 8892 states and 10913 transitions. [2021-11-02 12:35:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 12:35:08,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 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 121 [2021-11-02 12:35:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:35:08,180 INFO L225 Difference]: With dead ends: 8892 [2021-11-02 12:35:08,180 INFO L226 Difference]: Without dead ends: 5309 [2021-11-02 12:35:08,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 121.92ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 12:35:08,183 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 469 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 76 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11089.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.92ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13420.79ms IncrementalHoareTripleChecker+Time [2021-11-02 12:35:08,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 0 Invalid, 2598 Unknown, 0 Unchecked, 15.92ms Time], IncrementalHoareTripleChecker [76 Valid, 2521 Invalid, 1 Unknown, 0 Unchecked, 13420.79ms Time] [2021-11-02 12:35:08,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5309 states. [2021-11-02 12:35:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5309 to 3860. [2021-11-02 12:35:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3860 states, 3840 states have (on average 1.2046875) internal successors, (4626), 3859 states have internal predecessors, (4626), 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) [2021-11-02 12:35:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3860 states to 3860 states and 4626 transitions. [2021-11-02 12:35:08,370 INFO L78 Accepts]: Start accepts. Automaton has 3860 states and 4626 transitions. Word has length 121 [2021-11-02 12:35:08,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:35:08,370 INFO L470 AbstractCegarLoop]: Abstraction has 3860 states and 4626 transitions. [2021-11-02 12:35:08,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 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) [2021-11-02 12:35:08,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3860 states and 4626 transitions. [2021-11-02 12:35:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-02 12:35:08,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:35:08,372 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:35:08,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 12:35:08,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:35:08,596 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:35:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:35:08,596 INFO L85 PathProgramCache]: Analyzing trace with hash -848506226, now seen corresponding path program 1 times [2021-11-02 12:35:08,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:35:08,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877725308] [2021-11-02 12:35:08,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:35:08,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:35:08,640 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:35:08,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745543266] [2021-11-02 12:35:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:35:08,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:35:08,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:35:08,642 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:35:08,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 12:35:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:35:09,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 222 conjunts are in the unsatisfiable core [2021-11-02 12:35:09,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:35:09,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 12:35:10,137 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 12:35:10,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 12:35:10,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-02 12:35:10,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:35:10,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-11-02 12:35:11,158 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-02 12:35:11,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-02 12:35:11,409 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 12:35:11,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 26 [2021-11-02 12:35:13,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:35:13,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 58 [2021-11-02 12:35:13,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:35:13,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2021-11-02 12:35:14,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 52 [2021-11-02 12:35:14,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2021-11-02 12:35:16,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 12:35:16,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2021-11-02 12:35:16,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2021-11-02 12:35:17,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 12:35:17,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2021-11-02 12:35:17,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2021-11-02 12:35:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:35:19,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:35:19,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:35:19,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877725308] [2021-11-02 12:35:19,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:35:19,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745543266] [2021-11-02 12:35:19,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745543266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:35:19,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:35:19,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-02 12:35:19,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146667101] [2021-11-02 12:35:19,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 12:35:19,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:35:19,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 12:35:19,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-11-02 12:35:19,256 INFO L87 Difference]: Start difference. First operand 3860 states and 4626 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 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) [2021-11-02 12:35:21,985 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:36:41,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:36:41,534 INFO L93 Difference]: Finished difference Result 9586 states and 11473 transitions. [2021-11-02 12:36:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 12:36:41,537 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 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 122 [2021-11-02 12:36:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:36:41,544 INFO L225 Difference]: With dead ends: 9586 [2021-11-02 12:36:41,544 INFO L226 Difference]: Without dead ends: 7770 [2021-11-02 12:36:41,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 11866.71ms TimeCoverageRelationStatistics Valid=506, Invalid=2356, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 12:36:41,547 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 4299 mSDsluCounter, 11353 mSDsCounter, 0 mSdLazyCounter, 18752 mSolverCounterSat, 623 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62000.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4299 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 19376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 143.18ms SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 18752 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73968.02ms IncrementalHoareTripleChecker+Time [2021-11-02 12:36:41,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4299 Valid, 0 Invalid, 19376 Unknown, 0 Unchecked, 143.18ms Time], IncrementalHoareTripleChecker [623 Valid, 18752 Invalid, 1 Unknown, 0 Unchecked, 73968.02ms Time] [2021-11-02 12:36:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7770 states. [2021-11-02 12:36:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7770 to 5080. [2021-11-02 12:36:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5080 states, 5060 states have (on average 1.2027667984189723) internal successors, (6086), 5079 states have internal predecessors, (6086), 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) [2021-11-02 12:36:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5080 states to 5080 states and 6086 transitions. [2021-11-02 12:36:41,794 INFO L78 Accepts]: Start accepts. Automaton has 5080 states and 6086 transitions. Word has length 122 [2021-11-02 12:36:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:36:41,795 INFO L470 AbstractCegarLoop]: Abstraction has 5080 states and 6086 transitions. [2021-11-02 12:36:41,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 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) [2021-11-02 12:36:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 5080 states and 6086 transitions. [2021-11-02 12:36:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-02 12:36:41,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:36:41,796 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:36:41,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-02 12:36:42,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:36:42,023 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:36:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:36:42,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1453132892, now seen corresponding path program 1 times [2021-11-02 12:36:42,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:36:42,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100167919] [2021-11-02 12:36:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:36:42,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:36:42,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:36:42,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320811914] [2021-11-02 12:36:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:36:42,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:36:42,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:36:42,068 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:36:42,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 12:36:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:36:43,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 3195 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-02 12:36:43,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:36:43,750 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-02 12:36:43,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2021-11-02 12:36:44,080 INFO L354 Elim1Store]: treesize reduction 100, result has 31.5 percent of original size [2021-11-02 12:36:44,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 74 [2021-11-02 12:37:03,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:37:03,778 INFO L354 Elim1Store]: treesize reduction 138, result has 38.9 percent of original size [2021-11-02 12:37:03,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 84 treesize of output 151 [2021-11-02 12:37:11,702 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 68 treesize of output 60 [2021-11-02 12:37:11,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-02 12:37:11,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-11-02 12:37:11,881 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 10 treesize of output 4 [2021-11-02 12:37:11,890 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 9 treesize of output 3 [2021-11-02 12:37:11,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 12:37:11,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 12:37:11,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-02 12:37:11,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 12:37:11,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 12:37:11,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 34 [2021-11-02 12:37:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:37:12,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:37:12,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:37:12,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100167919] [2021-11-02 12:37:12,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:37:12,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320811914] [2021-11-02 12:37:12,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320811914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:37:12,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:37:12,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-02 12:37:12,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093219183] [2021-11-02 12:37:12,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 12:37:12,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:37:12,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 12:37:12,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=215, Unknown=9, NotChecked=0, Total=272 [2021-11-02 12:37:12,283 INFO L87 Difference]: Start difference. First operand 5080 states and 6086 transitions. Second operand has 17 states, 17 states have (on average 7.176470588235294) internal successors, (122), 17 states have internal predecessors, (122), 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) [2021-11-02 12:37:14,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:37:26,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:37:26,426 INFO L93 Difference]: Finished difference Result 6751 states and 8088 transitions. [2021-11-02 12:37:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 12:37:26,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.176470588235294) internal successors, (122), 17 states have internal predecessors, (122), 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 122 [2021-11-02 12:37:26,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:37:26,432 INFO L225 Difference]: With dead ends: 6751 [2021-11-02 12:37:26,432 INFO L226 Difference]: Without dead ends: 5184 [2021-11-02 12:37:26,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 25652.62ms TimeCoverageRelationStatistics Valid=73, Invalid=338, Unknown=9, NotChecked=0, Total=420 [2021-11-02 12:37:26,434 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 2407 mSDsCounter, 0 mSdLazyCounter, 3406 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11501.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.26ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3406 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 671 IncrementalHoareTripleChecker+Unchecked, 13555.89ms IncrementalHoareTripleChecker+Time [2021-11-02 12:37:26,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 4081 Unknown, 0 Unchecked, 18.26ms Time], IncrementalHoareTripleChecker [3 Valid, 3406 Invalid, 1 Unknown, 671 Unchecked, 13555.89ms Time] [2021-11-02 12:37:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2021-11-02 12:37:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 5135. [2021-11-02 12:37:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5135 states, 5115 states have (on average 1.2017595307917888) internal successors, (6147), 5134 states have internal predecessors, (6147), 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) [2021-11-02 12:37:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5135 states to 5135 states and 6147 transitions. [2021-11-02 12:37:26,697 INFO L78 Accepts]: Start accepts. Automaton has 5135 states and 6147 transitions. Word has length 122 [2021-11-02 12:37:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:37:26,697 INFO L470 AbstractCegarLoop]: Abstraction has 5135 states and 6147 transitions. [2021-11-02 12:37:26,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.176470588235294) internal successors, (122), 17 states have internal predecessors, (122), 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) [2021-11-02 12:37:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 5135 states and 6147 transitions. [2021-11-02 12:37:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 12:37:26,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:37:26,699 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:37:26,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 12:37:26,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 12:37:26,926 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:37:26,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:37:26,926 INFO L85 PathProgramCache]: Analyzing trace with hash 751217665, now seen corresponding path program 1 times [2021-11-02 12:37:26,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:37:26,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173892390] [2021-11-02 12:37:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:37:26,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:37:26,968 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:37:26,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564668756] [2021-11-02 12:37:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:37:26,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:37:26,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:37:26,969 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:37:26,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 12:37:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:37:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 3195 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 12:37:27,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:37:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 12:37:28,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 12:37:28,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 12:37:28,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173892390] [2021-11-02 12:37:28,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 12:37:28,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564668756] [2021-11-02 12:37:28,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564668756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 12:37:28,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 12:37:28,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 12:37:28,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783314129] [2021-11-02 12:37:28,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 12:37:28,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 12:37:28,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 12:37:28,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-02 12:37:28,590 INFO L87 Difference]: Start difference. First operand 5135 states and 6147 transitions. Second operand has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 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) [2021-11-02 12:37:31,303 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 12:38:01,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 12:38:01,547 INFO L93 Difference]: Finished difference Result 9044 states and 10678 transitions. [2021-11-02 12:38:01,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 12:38:01,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 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 123 [2021-11-02 12:38:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 12:38:01,551 INFO L225 Difference]: With dead ends: 9044 [2021-11-02 12:38:01,551 INFO L226 Difference]: Without dead ends: 3752 [2021-11-02 12:38:01,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 2418.44ms TimeCoverageRelationStatistics Valid=630, Invalid=2232, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 12:38:01,556 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 5735 mSDsluCounter, 6531 mSDsCounter, 0 mSdLazyCounter, 9290 mSolverCounterSat, 337 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26866.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5735 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 74.95ms SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 9290 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30324.52ms IncrementalHoareTripleChecker+Time [2021-11-02 12:38:01,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5735 Valid, 0 Invalid, 9628 Unknown, 0 Unchecked, 74.95ms Time], IncrementalHoareTripleChecker [337 Valid, 9290 Invalid, 1 Unknown, 0 Unchecked, 30324.52ms Time] [2021-11-02 12:38:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-11-02 12:38:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 1514. [2021-11-02 12:38:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1494 states have (on average 1.1572958500669344) internal successors, (1729), 1513 states have internal predecessors, (1729), 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) [2021-11-02 12:38:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1729 transitions. [2021-11-02 12:38:01,631 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1729 transitions. Word has length 123 [2021-11-02 12:38:01,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 12:38:01,631 INFO L470 AbstractCegarLoop]: Abstraction has 1514 states and 1729 transitions. [2021-11-02 12:38:01,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 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) [2021-11-02 12:38:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1729 transitions. [2021-11-02 12:38:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 12:38:01,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 12:38:01,633 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 12:38:01,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 12:38:01,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 12:38:01,857 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-02 12:38:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 12:38:01,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1007198241, now seen corresponding path program 1 times [2021-11-02 12:38:01,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 12:38:01,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665700737] [2021-11-02 12:38:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:38:01,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 12:38:01,899 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 12:38:01,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650663263] [2021-11-02 12:38:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 12:38:01,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 12:38:01,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 12:38:01,901 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 12:38:01,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 12:38:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 12:38:02,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 135 conjunts are in the unsatisfiable core [2021-11-02 12:38:02,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 12:38:02,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 12:38:03,226 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 12:38:03,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 12:38:03,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-02 12:38:03,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:38:03,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-11-02 12:38:04,468 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-02 12:38:04,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-02 12:38:04,861 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 12:38:04,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 26 [2021-11-02 12:38:06,962 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 12:38:06,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-02 12:38:07,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:38:07,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-02 12:38:07,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:38:07,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-11-02 12:38:07,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 12:38:07,878 INFO L354 Elim1Store]: treesize reduction 50, result has 41.2 percent of original size [2021-11-02 12:38:07,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 98 [2021-11-02 12:38:07,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:38:07,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2021-11-02 12:38:18,956 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 12:38:18,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 60 [2021-11-02 12:38:20,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:38:20,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 12:38:20,742 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-11-02 12:38:20,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 102 treesize of output 117 [2021-11-02 12:38:20,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 12:38:20,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 76 Killed by 15