./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fcb8e130 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_linked_list_node_reset_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 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-fcb8e13 [2021-11-22 20:18:10,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 20:18:10,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 20:18:10,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 20:18:10,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 20:18:10,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 20:18:10,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 20:18:10,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 20:18:10,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 20:18:10,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 20:18:10,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 20:18:10,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 20:18:10,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 20:18:10,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 20:18:10,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 20:18:10,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 20:18:10,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 20:18:10,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 20:18:10,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 20:18:10,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 20:18:10,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 20:18:10,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 20:18:10,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 20:18:10,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 20:18:10,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 20:18:10,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 20:18:10,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 20:18:10,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 20:18:10,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 20:18:10,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 20:18:10,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 20:18:10,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 20:18:10,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 20:18:10,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 20:18:10,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 20:18:10,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 20:18:10,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 20:18:10,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 20:18:10,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 20:18:10,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 20:18:10,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 20:18:10,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-22 20:18:10,889 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 20:18:10,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 20:18:10,890 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 20:18:10,890 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 20:18:10,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 20:18:10,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 20:18:10,891 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 20:18:10,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 20:18:10,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 20:18:10,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 20:18:10,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 20:18:10,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 20:18:10,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 20:18:10,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 20:18:10,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 20:18:10,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 20:18:10,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 20:18:10,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 20:18:10,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 20:18:10,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 20:18:10,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 20:18:10,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 20:18:10,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 20:18:10,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 20:18:10,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 20:18:10,894 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 20:18:10,895 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 20:18:10,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 20:18:10,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 20:18:10,896 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 [2021-11-22 20:18:11,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 20:18:11,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 20:18:11,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 20:18:11,166 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 20:18:11,167 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 20:18:11,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2021-11-22 20:18:11,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38f0a234c/77a7d6dac3034cfabbe9962f0e59e7e2/FLAG63a49ad69 [2021-11-22 20:18:11,738 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 20:18:11,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2021-11-22 20:18:11,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38f0a234c/77a7d6dac3034cfabbe9962f0e59e7e2/FLAG63a49ad69 [2021-11-22 20:18:12,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38f0a234c/77a7d6dac3034cfabbe9962f0e59e7e2 [2021-11-22 20:18:12,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 20:18:12,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 20:18:12,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 20:18:12,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 20:18:12,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 20:18:12,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 08:18:12" (1/1) ... [2021-11-22 20:18:12,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@642bd1dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:12, skipping insertion in model container [2021-11-22 20:18:12,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 08:18:12" (1/1) ... [2021-11-22 20:18:12,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 20:18:12,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 20:18:12,282 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2021-11-22 20:18:12,287 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2021-11-22 20:18:12,806 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:12,807 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:12,808 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:12,809 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:12,811 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:12,822 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:12,824 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:12,830 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:12,830 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:12,831 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:12,832 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:12,834 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:12,834 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,033 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-22 20:18:13,034 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-22 20:18:13,034 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-22 20:18:13,035 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-22 20:18:13,036 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-22 20:18:13,036 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-22 20:18:13,037 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-22 20:18:13,037 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-22 20:18:13,038 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-22 20:18:13,038 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-22 20:18:13,158 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-22 20:18:13,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 20:18:13,209 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 20:18:13,230 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2021-11-22 20:18:13,232 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2021-11-22 20:18:13,268 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,269 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,269 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,270 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,271 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,283 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,286 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,288 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,288 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,289 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,289 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,290 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,290 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:18:13,320 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-22 20:18:13,321 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-22 20:18:13,322 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-22 20:18:13,322 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-22 20:18:13,328 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-22 20:18:13,328 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-22 20:18:13,329 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-22 20:18:13,329 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-22 20:18:13,329 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-22 20:18:13,330 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-22 20:18:13,353 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-22 20:18:13,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 20:18:13,537 INFO L208 MainTranslator]: Completed translation [2021-11-22 20:18:13,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:13 WrapperNode [2021-11-22 20:18:13,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 20:18:13,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 20:18:13,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 20:18:13,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 20:18:13,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:13" (1/1) ... [2021-11-22 20:18:13,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:13" (1/1) ... [2021-11-22 20:18:13,656 INFO L137 Inliner]: procedures = 679, calls = 1032, calls flagged for inlining = 542, calls inlined = 10, statements flattened = 97 [2021-11-22 20:18:13,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 20:18:13,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 20:18:13,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 20:18:13,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 20:18:13,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:13" (1/1) ... [2021-11-22 20:18:13,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:13" (1/1) ... [2021-11-22 20:18:13,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:13" (1/1) ... [2021-11-22 20:18:13,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:13" (1/1) ... [2021-11-22 20:18:13,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:13" (1/1) ... [2021-11-22 20:18:13,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:13" (1/1) ... [2021-11-22 20:18:13,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:13" (1/1) ... [2021-11-22 20:18:13,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 20:18:13,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 20:18:13,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 20:18:13,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 20:18:13,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:13" (1/1) ... [2021-11-22 20:18:13,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 20:18:13,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:18:13,748 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) [2021-11-22 20:18:13,755 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 [2021-11-22 20:18:13,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 20:18:13,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 20:18:13,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 20:18:13,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 20:18:13,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 20:18:13,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 20:18:13,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-22 20:18:13,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 20:18:13,943 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 20:18:13,944 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 20:18:14,104 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 20:18:14,108 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 20:18:14,108 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-22 20:18:14,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 08:18:14 BoogieIcfgContainer [2021-11-22 20:18:14,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 20:18:14,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 20:18:14,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 20:18:14,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 20:18:14,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 08:18:12" (1/3) ... [2021-11-22 20:18:14,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48cd9396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 08:18:14, skipping insertion in model container [2021-11-22 20:18:14,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:18:13" (2/3) ... [2021-11-22 20:18:14,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48cd9396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 08:18:14, skipping insertion in model container [2021-11-22 20:18:14,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 08:18:14" (3/3) ... [2021-11-22 20:18:14,115 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2021-11-22 20:18:14,118 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 20:18:14,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-22 20:18:14,144 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 20:18:14,148 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 [2021-11-22 20:18:14,148 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-22 20:18:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:18:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 20:18:14,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:18:14,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:18:14,160 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 20:18:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:18:14,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2063040190, now seen corresponding path program 1 times [2021-11-22 20:18:14,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:18:14,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956757658] [2021-11-22 20:18:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:18:14,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:18:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:18:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:18:14,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:18:14,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956757658] [2021-11-22 20:18:14,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956757658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:18:14,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:18:14,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 20:18:14,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655056514] [2021-11-22 20:18:14,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:18:14,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 20:18:14,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:18:14,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 20:18:14,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 20:18:14,364 INFO L87 Difference]: Start difference. First operand has 32 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-22 20:18:14,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:18:14,378 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2021-11-22 20:18:14,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 20:18:14,380 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-11-22 20:18:14,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:18:14,385 INFO L225 Difference]: With dead ends: 61 [2021-11-22 20:18:14,385 INFO L226 Difference]: Without dead ends: 27 [2021-11-22 20:18:14,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 20:18:14,391 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:18:14,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:18:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-22 20:18:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-22 20:18:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:18:14,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-22 20:18:14,415 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 11 [2021-11-22 20:18:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:18:14,416 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-22 20:18:14,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-22 20:18:14,419 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-22 20:18:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 20:18:14,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:18:14,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:18:14,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 20:18:14,421 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 20:18:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:18:14,423 INFO L85 PathProgramCache]: Analyzing trace with hash -154241512, now seen corresponding path program 1 times [2021-11-22 20:18:14,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:18:14,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710202380] [2021-11-22 20:18:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:18:14,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:18:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:18:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:18:14,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:18:14,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710202380] [2021-11-22 20:18:14,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710202380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:18:14,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:18:14,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 20:18:14,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231359966] [2021-11-22 20:18:14,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:18:14,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 20:18:14,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:18:14,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 20:18:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 20:18:14,548 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-22 20:18:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:18:14,591 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-22 20:18:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 20:18:14,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-11-22 20:18:14,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:18:14,592 INFO L225 Difference]: With dead ends: 43 [2021-11-22 20:18:14,592 INFO L226 Difference]: Without dead ends: 34 [2021-11-22 20:18:14,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 20:18:14,593 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:18:14,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:18:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-22 20:18:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-11-22 20:18:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:18:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-22 20:18:14,603 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 14 [2021-11-22 20:18:14,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:18:14,603 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-22 20:18:14,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-22 20:18:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-22 20:18:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 20:18:14,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:18:14,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:18:14,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 20:18:14,604 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 20:18:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:18:14,605 INFO L85 PathProgramCache]: Analyzing trace with hash -152632798, now seen corresponding path program 1 times [2021-11-22 20:18:14,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:18:14,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980098525] [2021-11-22 20:18:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:18:14,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:18:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:18:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:18:14,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:18:14,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980098525] [2021-11-22 20:18:14,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980098525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:18:14,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:18:14,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 20:18:14,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985634771] [2021-11-22 20:18:14,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:18:14,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 20:18:14,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:18:14,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 20:18:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 20:18:14,760 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-11-22 20:18:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:18:14,772 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-11-22 20:18:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 20:18:14,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2021-11-22 20:18:14,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:18:14,774 INFO L225 Difference]: With dead ends: 51 [2021-11-22 20:18:14,774 INFO L226 Difference]: Without dead ends: 29 [2021-11-22 20:18:14,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 20:18:14,775 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:18:14,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:18:14,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-22 20:18:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-22 20:18:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 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) [2021-11-22 20:18:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-22 20:18:14,781 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 14 [2021-11-22 20:18:14,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:18:14,781 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-22 20:18:14,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-11-22 20:18:14,781 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-22 20:18:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 20:18:14,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:18:14,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:18:14,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 20:18:14,783 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 20:18:14,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:18:14,783 INFO L85 PathProgramCache]: Analyzing trace with hash 520356801, now seen corresponding path program 1 times [2021-11-22 20:18:14,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:18:14,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72274173] [2021-11-22 20:18:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:18:14,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:18:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:18:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:18:14,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:18:14,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72274173] [2021-11-22 20:18:14,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72274173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:18:14,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171417582] [2021-11-22 20:18:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:18:14,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:18:14,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:18:14,968 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) [2021-11-22 20:18:14,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 20:18:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:18:15,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-22 20:18:15,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:18:15,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 20:18:15,189 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 [2021-11-22 20:18:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:18:15,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:18:15,327 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 56 treesize of output 48 [2021-11-22 20:18:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:18:15,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171417582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:18:15,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:18:15,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2021-11-22 20:18:15,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031375034] [2021-11-22 20:18:15,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:18:15,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 20:18:15,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:18:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 20:18:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-22 20:18:15,367 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:18:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:18:15,438 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-11-22 20:18:15,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 20:18:15,438 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 20:18:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:18:15,439 INFO L225 Difference]: With dead ends: 52 [2021-11-22 20:18:15,439 INFO L226 Difference]: Without dead ends: 30 [2021-11-22 20:18:15,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-22 20:18:15,440 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:18:15,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 155 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:18:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-22 20:18:15,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-22 20:18:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 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) [2021-11-22 20:18:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-22 20:18:15,444 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2021-11-22 20:18:15,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:18:15,444 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-22 20:18:15,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:18:15,444 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-22 20:18:15,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 20:18:15,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:18:15,445 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:18:15,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 20:18:15,664 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 [2021-11-22 20:18:15,664 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 20:18:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:18:15,665 INFO L85 PathProgramCache]: Analyzing trace with hash -91802110, now seen corresponding path program 2 times [2021-11-22 20:18:15,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:18:15,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062644088] [2021-11-22 20:18:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:18:15,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:18:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:18:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:18:15,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:18:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062644088] [2021-11-22 20:18:15,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062644088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:18:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227718107] [2021-11-22 20:18:15,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 20:18:15,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:18:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:18:15,764 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) [2021-11-22 20:18:15,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 20:18:15,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 20:18:15,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:18:15,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-22 20:18:15,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:18:15,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 20:18:15,983 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-22 20:18:15,983 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 25 treesize of output 20 [2021-11-22 20:18:16,055 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-22 20:18:16,056 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 28 treesize of output 10 [2021-11-22 20:18:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:18:16,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:18:16,204 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 130 treesize of output 122 [2021-11-22 20:18:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:18:16,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227718107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:18:16,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:18:16,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2021-11-22 20:18:16,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434195691] [2021-11-22 20:18:16,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:18:16,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 20:18:16,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:18:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 20:18:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-22 20:18:16,270 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:18:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:18:16,476 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-11-22 20:18:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 20:18:16,476 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-22 20:18:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:18:16,477 INFO L225 Difference]: With dead ends: 83 [2021-11-22 20:18:16,477 INFO L226 Difference]: Without dead ends: 61 [2021-11-22 20:18:16,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-11-22 20:18:16,478 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:18:16,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 221 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:18:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-22 20:18:16,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2021-11-22 20:18:16,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:18:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-22 20:18:16,481 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 16 [2021-11-22 20:18:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:18:16,482 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-22 20:18:16,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:18:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-22 20:18:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 20:18:16,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:18:16,482 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:18:16,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 20:18:16,695 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 [2021-11-22 20:18:16,695 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 20:18:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:18:16,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1763053086, now seen corresponding path program 3 times [2021-11-22 20:18:16,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:18:16,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475560558] [2021-11-22 20:18:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:18:16,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:18:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:18:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:18:16,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:18:16,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475560558] [2021-11-22 20:18:16,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475560558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:18:16,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564266816] [2021-11-22 20:18:16,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 20:18:16,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:18:16,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:18:16,819 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) [2021-11-22 20:18:16,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 20:18:16,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 20:18:16,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:18:16,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-22 20:18:16,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:18:16,955 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 14 treesize of output 10 [2021-11-22 20:18:16,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:18:16,993 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 [2021-11-22 20:18:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:18:17,019 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 [2021-11-22 20:18:17,045 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-22 20:18:17,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-22 20:18:17,101 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-22 20:18:17,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-11-22 20:18:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:18:17,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:18:17,395 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 2360 treesize of output 2328 [2021-11-22 20:19:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:19:22,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564266816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:19:22,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:19:22,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2021-11-22 20:19:22,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987509197] [2021-11-22 20:19:22,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:19:22,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 20:19:22,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:19:22,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 20:19:22,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-11-22 20:19:22,537 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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) [2021-11-22 20:19:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:19:22,888 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2021-11-22 20:19:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 20:19:22,888 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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 18 [2021-11-22 20:19:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:19:22,893 INFO L225 Difference]: With dead ends: 91 [2021-11-22 20:19:22,893 INFO L226 Difference]: Without dead ends: 64 [2021-11-22 20:19:22,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-11-22 20:19:22,896 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:19:22,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 285 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 150 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2021-11-22 20:19:22,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-22 20:19:22,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 40. [2021-11-22 20:19:22,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:19:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-11-22 20:19:22,922 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 18 [2021-11-22 20:19:22,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:19:22,923 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-11-22 20:19:22,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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) [2021-11-22 20:19:22,923 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-11-22 20:19:22,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 20:19:22,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:19:22,924 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:19:22,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 20:19:23,140 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 [2021-11-22 20:19:23,141 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 20:19:23,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:19:23,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1160004641, now seen corresponding path program 4 times [2021-11-22 20:19:23,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:19:23,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708755988] [2021-11-22 20:19:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:19:23,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:19:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:19:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:19:23,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:19:23,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708755988] [2021-11-22 20:19:23,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708755988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:19:23,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137361756] [2021-11-22 20:19:23,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 20:19:23,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:19:23,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:19:23,314 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) [2021-11-22 20:19:23,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 20:19:23,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 20:19:23,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:19:23,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-22 20:19:23,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:19:23,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 20:19:23,526 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-22 20:19:23,527 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 28 [2021-11-22 20:19:23,559 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-22 20:19:23,560 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 28 [2021-11-22 20:19:23,594 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-22 20:19:23,594 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 28 [2021-11-22 20:19:23,623 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-22 20:19:23,623 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 23 [2021-11-22 20:19:23,658 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-22 20:19:23,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-22 20:19:23,701 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-22 20:19:23,702 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 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-22 20:19:23,763 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 [2021-11-22 20:19:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 20:19:23,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:19:24,899 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr676#1| Int)) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr#1.base|) (+ |c_ULTIMATE.start_#Ultimate.C_memset_#ptr#1.offset| |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr676#1|) |c_ULTIMATE.start_#Ultimate.C_memset_#value#1|)) |c_ULTIMATE.start_aws_linked_list_node_reset_~node#1.base|) |c_ULTIMATE.start_aws_linked_list_node_reset_~node#1.offset|))) (<= (div (* .cse0 (- 1)) (- 256)) (+ (div (+ (- 256) .cse0) 256) 1)))) is different from false [2021-11-22 20:20:15,964 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 574462 treesize of output 573438 [2021-11-22 20:20:17,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-22 20:20:17,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 20:20:17,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-22 20:20:17,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755167606] [2021-11-22 20:20:17,312 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 20:20:17,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 20:20:17,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:20:17,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 20:20:17,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=681, Unknown=23, NotChecked=54, Total=870 [2021-11-22 20:20:17,313 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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) [2021-11-22 20:20:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:20:17,361 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-11-22 20:20:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 20:20:17,362 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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 21 [2021-11-22 20:20:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:20:17,362 INFO L225 Difference]: With dead ends: 63 [2021-11-22 20:20:17,362 INFO L226 Difference]: Without dead ends: 36 [2021-11-22 20:20:17,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 52.0s TimeCoverageRelationStatistics Valid=112, Invalid=681, Unknown=23, NotChecked=54, Total=870 [2021-11-22 20:20:17,363 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:20:17,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 210 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:20:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-22 20:20:17,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-22 20:20:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 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) [2021-11-22 20:20:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-11-22 20:20:17,366 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 21 [2021-11-22 20:20:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:20:17,367 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-11-22 20:20:17,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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) [2021-11-22 20:20:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-11-22 20:20:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 20:20:17,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:20:17,367 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:20:17,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 20:20:17,584 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 [2021-11-22 20:20:17,585 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 20:20:17,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:20:17,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1737555550, now seen corresponding path program 5 times [2021-11-22 20:20:17,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:20:17,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365890580] [2021-11-22 20:20:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:20:17,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:20:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:20:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:20:17,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:20:17,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365890580] [2021-11-22 20:20:17,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365890580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:20:17,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827428501] [2021-11-22 20:20:17,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 20:20:17,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:20:17,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:20:17,776 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) [2021-11-22 20:20:17,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 20:20:18,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-22 20:20:18,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:20:18,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-22 20:20:18,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:20:18,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 20:20:18,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:20:18,757 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 [2021-11-22 20:20:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:20:18,824 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-22 20:20:18,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-11-22 20:20:18,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:20:18,913 INFO L354 Elim1Store]: treesize reduction 94, result has 21.7 percent of original size [2021-11-22 20:20:18,913 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 52 [2021-11-22 20:20:23,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:20:23,258 INFO L354 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2021-11-22 20:20:23,258 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 64 [2021-11-22 20:20:29,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:20:29,772 INFO L354 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2021-11-22 20:20:29,772 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 64 [2021-11-22 20:20:40,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:20:40,103 INFO L354 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2021-11-22 20:20:40,103 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 64 [2021-11-22 20:20:52,499 INFO L354 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2021-11-22 20:20:52,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 64 [2021-11-22 20:21:04,866 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-11-22 20:21:04,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 27 [2021-11-22 20:21:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 29 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:21:04,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:22:15,075 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 4508 treesize of output 4500 [2021-11-22 20:22:15,085 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-22 20:22:15,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 20:22:15,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-22 20:22:15,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740182502] [2021-11-22 20:22:15,092 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 20:22:15,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 20:22:15,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:22:15,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 20:22:15,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=872, Unknown=47, NotChecked=0, Total=1056 [2021-11-22 20:22:15,094 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2021-11-22 20:22:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:22:15,164 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-22 20:22:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 20:22:15,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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 22 [2021-11-22 20:22:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:22:15,165 INFO L225 Difference]: With dead ends: 59 [2021-11-22 20:22:15,165 INFO L226 Difference]: Without dead ends: 37 [2021-11-22 20:22:15,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 115.6s TimeCoverageRelationStatistics Valid=137, Invalid=872, Unknown=47, NotChecked=0, Total=1056 [2021-11-22 20:22:15,166 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:22:15,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 262 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:22:15,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-22 20:22:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-22 20:22:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 36 states have internal predecessors, (40), 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) [2021-11-22 20:22:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-11-22 20:22:15,174 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 22 [2021-11-22 20:22:15,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:22:15,174 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-11-22 20:22:15,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2021-11-22 20:22:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-11-22 20:22:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 20:22:15,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:22:15,175 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:22:15,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 20:22:15,380 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 [2021-11-22 20:22:15,381 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 20:22:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:22:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1367608255, now seen corresponding path program 6 times [2021-11-22 20:22:15,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:22:15,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842449922] [2021-11-22 20:22:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:22:15,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:22:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:22:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:22:15,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:22:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842449922] [2021-11-22 20:22:15,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842449922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:22:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068105379] [2021-11-22 20:22:15,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 20:22:15,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:22:15,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:22:15,570 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) [2021-11-22 20:22:15,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 20:22:16,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-22 20:22:16,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:22:16,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-22 20:22:16,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:22:16,075 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 14 treesize of output 10 [2021-11-22 20:22:16,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,105 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 [2021-11-22 20:22:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-22 20:22:16,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-22 20:22:16,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 57 [2021-11-22 20:22:16,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 70 [2021-11-22 20:22:16,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 83 [2021-11-22 20:22:16,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:16,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 96 [2021-11-22 20:22:16,679 INFO L354 Elim1Store]: treesize reduction 524, result has 11.9 percent of original size [2021-11-22 20:22:16,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 132 treesize of output 104 [2021-11-22 20:22:16,889 INFO L354 Elim1Store]: treesize reduction 416, result has 0.2 percent of original size [2021-11-22 20:22:16,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 87 treesize of output 31 [2021-11-22 20:22:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:22:16,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:22:18,616 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 18926 treesize of output 18918 [2021-11-22 20:22:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:22:19,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068105379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:22:19,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:22:19,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 36 [2021-11-22 20:22:19,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2511523] [2021-11-22 20:22:19,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:22:19,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-22 20:22:19,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:22:19,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-22 20:22:19,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 20:22:19,382 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 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) [2021-11-22 20:22:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:22:39,994 INFO L93 Difference]: Finished difference Result 286 states and 332 transitions. [2021-11-22 20:22:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-22 20:22:39,995 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 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 23 [2021-11-22 20:22:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:22:39,996 INFO L225 Difference]: With dead ends: 286 [2021-11-22 20:22:39,996 INFO L226 Difference]: Without dead ends: 264 [2021-11-22 20:22:39,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=766, Invalid=3926, Unknown=0, NotChecked=0, Total=4692 [2021-11-22 20:22:39,999 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1072 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-22 20:22:39,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 326 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-22 20:22:40,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-22 20:22:40,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 51. [2021-11-22 20:22:40,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 50 states have internal predecessors, (63), 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) [2021-11-22 20:22:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-11-22 20:22:40,016 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 23 [2021-11-22 20:22:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:22:40,016 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-11-22 20:22:40,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 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) [2021-11-22 20:22:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-11-22 20:22:40,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 20:22:40,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:22:40,017 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:22:40,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 20:22:40,219 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 [2021-11-22 20:22:40,220 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 20:22:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:22:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash -732301576, now seen corresponding path program 1 times [2021-11-22 20:22:40,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:22:40,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364362788] [2021-11-22 20:22:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:22:40,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:22:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:22:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:22:40,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:22:40,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364362788] [2021-11-22 20:22:40,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364362788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:22:40,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047156446] [2021-11-22 20:22:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:22:40,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:22:40,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:22:40,445 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) [2021-11-22 20:22:40,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 20:22:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:22:40,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-22 20:22:40,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:22:40,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 20:22:40,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,699 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 [2021-11-22 20:22:40,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-22 20:22:40,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2021-11-22 20:22:40,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 58 [2021-11-22 20:22:40,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 71 [2021-11-22 20:22:40,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:40,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 84 [2021-11-22 20:22:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 97 [2021-11-22 20:22:41,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:22:41,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 104 [2021-11-22 20:22:41,329 INFO L354 Elim1Store]: treesize reduction 644, result has 11.0 percent of original size [2021-11-22 20:22:41,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 147 treesize of output 116 [2021-11-22 20:22:41,768 INFO L354 Elim1Store]: treesize reduction 522, result has 0.2 percent of original size [2021-11-22 20:22:41,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 152 treesize of output 34 [2021-11-22 20:22:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:22:41,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:22:46,652 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-22 20:22:46,652 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 81757 treesize of output 81737 [2021-11-22 20:22:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:22:48,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047156446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:22:48,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:22:48,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 18] total 44 [2021-11-22 20:22:48,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061409330] [2021-11-22 20:22:48,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:22:48,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-22 20:22:48,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:22:48,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-22 20:22:48,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2021-11-22 20:22:48,130 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 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) [2021-11-22 20:23:19,266 WARN L227 SmtUtils]: Spent 10.78s on a formula simplification that was a NOOP. DAG size: 218 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:23:33,114 WARN L227 SmtUtils]: Spent 6.94s on a formula simplification that was a NOOP. DAG size: 197 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:24:42,552 WARN L227 SmtUtils]: Spent 22.01s on a formula simplification that was a NOOP. DAG size: 273 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:25:04,710 WARN L227 SmtUtils]: Spent 13.06s on a formula simplification that was a NOOP. DAG size: 252 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:25:48,429 WARN L227 SmtUtils]: Spent 20.70s on a formula simplification that was a NOOP. DAG size: 278 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:26:02,185 WARN L227 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 231 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:26:21,675 WARN L227 SmtUtils]: Spent 12.71s on a formula simplification that was a NOOP. DAG size: 257 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:26:51,730 WARN L227 SmtUtils]: Spent 15.26s on a formula simplification that was a NOOP. DAG size: 247 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:27:14,189 WARN L227 SmtUtils]: Spent 9.21s on a formula simplification that was a NOOP. DAG size: 236 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:27:30,224 WARN L227 SmtUtils]: Spent 9.60s on a formula simplification that was a NOOP. DAG size: 226 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:28:01,371 WARN L227 SmtUtils]: Spent 15.69s on a formula simplification that was a NOOP. DAG size: 246 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:28:24,404 WARN L227 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 205 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:28:41,876 WARN L227 SmtUtils]: Spent 10.80s on a formula simplification that was a NOOP. DAG size: 225 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:29:19,686 WARN L227 SmtUtils]: Spent 14.80s on a formula simplification that was a NOOP. DAG size: 250 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:29:41,874 WARN L227 SmtUtils]: Spent 5.63s on a formula simplification that was a NOOP. DAG size: 204 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:29:58,161 WARN L227 SmtUtils]: Spent 10.00s on a formula simplification that was a NOOP. DAG size: 229 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:30:28,251 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 208 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 20:31:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:31:17,533 INFO L93 Difference]: Finished difference Result 465 states and 535 transitions. [2021-11-22 20:31:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-22 20:31:17,534 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 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 27 [2021-11-22 20:31:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:31:17,536 INFO L225 Difference]: With dead ends: 465 [2021-11-22 20:31:17,536 INFO L226 Difference]: Without dead ends: 441 [2021-11-22 20:31:17,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2770 ImplicationChecksByTransitivity, 414.4s TimeCoverageRelationStatistics Valid=1772, Invalid=11110, Unknown=0, NotChecked=0, Total=12882 [2021-11-22 20:31:17,539 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2143 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2143 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.3s IncrementalHoareTripleChecker+Time [2021-11-22 20:31:17,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2143 Valid, 873 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 100.3s Time] [2021-11-22 20:31:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-11-22 20:31:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 62. [2021-11-22 20:31:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 61 states have internal predecessors, (79), 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) [2021-11-22 20:31:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2021-11-22 20:31:17,551 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 27 [2021-11-22 20:31:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:31:17,551 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2021-11-22 20:31:17,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 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) [2021-11-22 20:31:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2021-11-22 20:31:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 20:31:17,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:31:17,552 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:31:17,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 20:31:17,769 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 [2021-11-22 20:31:17,769 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 20:31:17,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:31:17,770 INFO L85 PathProgramCache]: Analyzing trace with hash -894508021, now seen corresponding path program 1 times [2021-11-22 20:31:17,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:31:17,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517772173] [2021-11-22 20:31:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:31:17,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:31:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:31:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:31:18,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:31:18,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517772173] [2021-11-22 20:31:18,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517772173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:31:18,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411845181] [2021-11-22 20:31:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:31:18,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:31:18,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:31:18,087 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) [2021-11-22 20:31:18,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 20:31:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:31:18,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 20:31:18,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:31:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-22 20:31:18,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:31:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 20:31:18,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411845181] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 20:31:18,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 20:31:18,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14, 4] total 16 [2021-11-22 20:31:18,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414774204] [2021-11-22 20:31:18,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:31:18,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 20:31:18,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:31:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 20:31:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-22 20:31:18,323 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-11-22 20:31:18,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:31:18,341 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2021-11-22 20:31:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 20:31:18,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-22 20:31:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:31:18,342 INFO L225 Difference]: With dead ends: 78 [2021-11-22 20:31:18,342 INFO L226 Difference]: Without dead ends: 66 [2021-11-22 20:31:18,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-22 20:31:18,342 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:31:18,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 42 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:31:18,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-22 20:31:18,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-11-22 20:31:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.278688524590164) internal successors, (78), 62 states have internal predecessors, (78), 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) [2021-11-22 20:31:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2021-11-22 20:31:18,355 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 31 [2021-11-22 20:31:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:31:18,355 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2021-11-22 20:31:18,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-11-22 20:31:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2021-11-22 20:31:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 20:31:18,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:31:18,356 INFO L514 BasicCegarLoop]: trace histogram [11, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:31:18,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 20:31:18,573 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 [2021-11-22 20:31:18,573 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 20:31:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:31:18,573 INFO L85 PathProgramCache]: Analyzing trace with hash 24067425, now seen corresponding path program 2 times [2021-11-22 20:31:18,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:31:18,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137129132] [2021-11-22 20:31:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:31:18,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:31:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:31:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 20:31:18,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:31:18,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137129132] [2021-11-22 20:31:18,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137129132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:31:18,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158559242] [2021-11-22 20:31:18,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 20:31:18,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:31:18,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:31:18,836 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) [2021-11-22 20:31:18,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 20:31:19,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 20:31:19,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:31:19,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-22 20:31:19,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:31:19,235 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 14 treesize of output 10 [2021-11-22 20:31:19,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-22 20:31:19,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-22 20:31:19,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2021-11-22 20:31:19,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2021-11-22 20:31:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 69 [2021-11-22 20:31:19,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 82 [2021-11-22 20:31:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 80 [2021-11-22 20:31:19,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 81 [2021-11-22 20:31:19,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 80 [2021-11-22 20:31:19,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:31:19,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:31:19,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2021-11-22 20:31:20,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:31:20,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 50 treesize of output 22 [2021-11-22 20:31:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:31:20,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:31:25,215 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 81801172 treesize of output 81788884 Killed by 15