./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5f08f0f0 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_rbegin_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 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 13:23:32,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 13:23:32,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 13:23:32,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 13:23:32,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 13:23:32,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 13:23:32,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 13:23:32,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 13:23:32,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 13:23:32,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 13:23:32,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 13:23:32,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 13:23:32,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 13:23:32,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 13:23:32,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 13:23:32,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 13:23:32,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 13:23:32,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 13:23:32,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 13:23:32,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 13:23:32,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 13:23:32,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 13:23:32,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 13:23:32,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 13:23:32,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 13:23:32,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 13:23:32,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 13:23:32,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 13:23:32,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 13:23:32,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 13:23:32,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 13:23:32,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 13:23:32,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 13:23:32,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 13:23:32,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 13:23:32,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 13:23:32,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 13:23:32,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 13:23:32,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 13:23:32,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 13:23:32,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 13:23:32,846 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 13:23:32,886 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 13:23:32,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 13:23:32,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 13:23:32,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 13:23:32,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 13:23:32,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 13:23:32,891 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 13:23:32,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 13:23:32,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 13:23:32,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 13:23:32,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 13:23:32,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 13:23:32,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 13:23:32,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 13:23:32,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 13:23:32,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 13:23:32,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 13:23:32,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 13:23:32,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 13:23:32,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 13:23:32,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 13:23:32,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 13:23:32,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 13:23:32,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 13:23:32,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 13:23:32,896 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 13:23:32,896 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 13:23:32,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 13:23:32,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 13:23:32,897 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 [2021-11-05 13:23:33,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 13:23:33,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 13:23:33,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 13:23:33,222 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 13:23:33,223 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 13:23:33,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-11-05 13:23:33,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b0bdd74c/2a00aeed6e55477d98556681908c378e/FLAGf3bbc2286 [2021-11-05 13:23:34,008 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 13:23:34,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-11-05 13:23:34,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b0bdd74c/2a00aeed6e55477d98556681908c378e/FLAGf3bbc2286 [2021-11-05 13:23:34,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b0bdd74c/2a00aeed6e55477d98556681908c378e [2021-11-05 13:23:34,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 13:23:34,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 13:23:34,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 13:23:34,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 13:23:34,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 13:23:34,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 01:23:34" (1/1) ... [2021-11-05 13:23:34,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7875ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:34, skipping insertion in model container [2021-11-05 13:23:34,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 01:23:34" (1/1) ... [2021-11-05 13:23:34,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 13:23:34,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 13:23:34,614 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2021-11-05 13:23:34,620 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2021-11-05 13:23:34,633 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-05 13:23:34,637 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-05 13:23:35,157 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,158 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,158 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,159 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,160 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,170 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,170 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,172 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,172 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,174 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,175 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,175 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,179 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,379 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-05 13:23:35,381 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-05 13:23:35,382 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-05 13:23:35,382 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-05 13:23:35,384 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-05 13:23:35,396 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-05 13:23:35,397 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-05 13:23:35,397 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-05 13:23:35,398 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-05 13:23:35,398 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-05 13:23:35,490 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-05 13:23:35,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 13:23:35,521 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 13:23:35,532 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2021-11-05 13:23:35,532 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2021-11-05 13:23:35,534 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-05 13:23:35,535 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-05 13:23:35,569 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,570 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,570 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,570 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,571 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,578 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,578 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,579 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,579 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,580 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,581 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,582 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,582 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:23:35,632 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-05 13:23:35,640 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-05 13:23:35,641 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-05 13:23:35,641 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-05 13:23:35,642 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-05 13:23:35,643 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-05 13:23:35,643 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-05 13:23:35,643 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-05 13:23:35,644 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-05 13:23:35,644 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-05 13:23:35,679 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-05 13:23:35,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 13:23:35,932 INFO L208 MainTranslator]: Completed translation [2021-11-05 13:23:35,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:35 WrapperNode [2021-11-05 13:23:35,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 13:23:35,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 13:23:35,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 13:23:35,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 13:23:35,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:35" (1/1) ... [2021-11-05 13:23:36,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:35" (1/1) ... [2021-11-05 13:23:36,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 13:23:36,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 13:23:36,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 13:23:36,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 13:23:36,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:35" (1/1) ... [2021-11-05 13:23:36,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:35" (1/1) ... [2021-11-05 13:23:36,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:35" (1/1) ... [2021-11-05 13:23:36,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:35" (1/1) ... [2021-11-05 13:23:36,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:35" (1/1) ... [2021-11-05 13:23:36,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:35" (1/1) ... [2021-11-05 13:23:36,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:35" (1/1) ... [2021-11-05 13:23:36,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 13:23:36,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 13:23:36,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 13:23:36,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 13:23:36,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:35" (1/1) ... [2021-11-05 13:23:36,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 13:23:36,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:23:36,181 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) [2021-11-05 13:23:36,211 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 [2021-11-05 13:23:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 13:23:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 13:23:36,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 13:23:36,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 13:23:36,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 13:23:36,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 13:23:36,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 13:23:36,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 13:23:36,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 13:23:36,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 13:23:36,884 INFO L299 CfgBuilder]: Removed 55 assume(true) statements. [2021-11-05 13:23:36,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 01:23:36 BoogieIcfgContainer [2021-11-05 13:23:36,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 13:23:36,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 13:23:36,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 13:23:36,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 13:23:36,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 01:23:34" (1/3) ... [2021-11-05 13:23:36,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795b9d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 01:23:36, skipping insertion in model container [2021-11-05 13:23:36,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:23:35" (2/3) ... [2021-11-05 13:23:36,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795b9d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 01:23:36, skipping insertion in model container [2021-11-05 13:23:36,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 01:23:36" (3/3) ... [2021-11-05 13:23:36,901 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness.i [2021-11-05 13:23:36,914 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 13:23:36,915 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-05 13:23:36,983 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 13:23:36,998 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 [2021-11-05 13:23:36,998 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-05 13:23:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 109 states have (on average 1.5596330275229358) internal successors, (170), 113 states have internal predecessors, (170), 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) [2021-11-05 13:23:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 13:23:37,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:37,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:37,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:37,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash -122732205, now seen corresponding path program 1 times [2021-11-05 13:23:37,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:37,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779232734] [2021-11-05 13:23:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:37,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:23:37,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:37,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779232734] [2021-11-05 13:23:37,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779232734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:37,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:37,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-05 13:23:37,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256579091] [2021-11-05 13:23:37,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:37,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-05 13:23:37,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:37,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-05 13:23:37,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-05 13:23:37,383 INFO L87 Difference]: Start difference. First operand has 114 states, 109 states have (on average 1.5596330275229358) internal successors, (170), 113 states have internal predecessors, (170), 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 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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) [2021-11-05 13:23:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:37,445 INFO L93 Difference]: Finished difference Result 224 states and 335 transitions. [2021-11-05 13:23:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-05 13:23:37,448 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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 41 [2021-11-05 13:23:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:37,458 INFO L225 Difference]: With dead ends: 224 [2021-11-05 13:23:37,459 INFO L226 Difference]: Without dead ends: 109 [2021-11-05 13:23:37,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-05 13:23:37,466 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:37,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 4.65ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-05 13:23:37,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-05 13:23:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-05 13:23:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.457142857142857) internal successors, (153), 108 states have internal predecessors, (153), 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) [2021-11-05 13:23:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 153 transitions. [2021-11-05 13:23:37,519 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 153 transitions. Word has length 41 [2021-11-05 13:23:37,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:37,522 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 153 transitions. [2021-11-05 13:23:37,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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) [2021-11-05 13:23:37,522 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 153 transitions. [2021-11-05 13:23:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 13:23:37,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:37,526 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:37,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 13:23:37,526 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:37,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1738897517, now seen corresponding path program 1 times [2021-11-05 13:23:37,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:37,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532921903] [2021-11-05 13:23:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:37,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:23:37,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:37,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532921903] [2021-11-05 13:23:37,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532921903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:37,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:37,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:23:37,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690969405] [2021-11-05 13:23:37,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:37,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:23:37,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:37,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:23:37,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:23:37,659 INFO L87 Difference]: Start difference. First operand 109 states and 153 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-05 13:23:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:37,803 INFO L93 Difference]: Finished difference Result 254 states and 367 transitions. [2021-11-05 13:23:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 13:23:37,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 41 [2021-11-05 13:23:37,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:37,807 INFO L225 Difference]: With dead ends: 254 [2021-11-05 13:23:37,807 INFO L226 Difference]: Without dead ends: 157 [2021-11-05 13:23:37,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.78ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:23:37,809 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 63 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.59ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.96ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:37,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 466 Invalid, 100 Unknown, 0 Unchecked, 6.59ms Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 102.96ms Time] [2021-11-05 13:23:37,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-05 13:23:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 117. [2021-11-05 13:23:37,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 113 states have (on average 1.424778761061947) internal successors, (161), 116 states have internal predecessors, (161), 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) [2021-11-05 13:23:37,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2021-11-05 13:23:37,826 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 41 [2021-11-05 13:23:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:37,827 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2021-11-05 13:23:37,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-05 13:23:37,827 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2021-11-05 13:23:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 13:23:37,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:37,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:37,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-05 13:23:37,829 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:37,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1037297643, now seen corresponding path program 1 times [2021-11-05 13:23:37,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:37,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906735922] [2021-11-05 13:23:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:37,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:23:37,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:37,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906735922] [2021-11-05 13:23:37,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906735922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:37,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:37,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:23:37,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807767453] [2021-11-05 13:23:37,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:37,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:23:37,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:37,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:23:37,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:23:37,928 INFO L87 Difference]: Start difference. First operand 117 states and 161 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-05 13:23:38,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:38,041 INFO L93 Difference]: Finished difference Result 250 states and 354 transitions. [2021-11-05 13:23:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 13:23:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 41 [2021-11-05 13:23:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:38,043 INFO L225 Difference]: With dead ends: 250 [2021-11-05 13:23:38,043 INFO L226 Difference]: Without dead ends: 149 [2021-11-05 13:23:38,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.72ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:23:38,045 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 36 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.08ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.59ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:38,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 432 Invalid, 104 Unknown, 0 Unchecked, 2.08ms Time], IncrementalHoareTripleChecker [13 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 95.59ms Time] [2021-11-05 13:23:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-05 13:23:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2021-11-05 13:23:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.396694214876033) internal successors, (169), 124 states have internal predecessors, (169), 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) [2021-11-05 13:23:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 169 transitions. [2021-11-05 13:23:38,051 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 169 transitions. Word has length 41 [2021-11-05 13:23:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:38,052 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 169 transitions. [2021-11-05 13:23:38,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-05 13:23:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 169 transitions. [2021-11-05 13:23:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 13:23:38,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:38,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:38,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-05 13:23:38,054 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:38,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:38,055 INFO L85 PathProgramCache]: Analyzing trace with hash 348905751, now seen corresponding path program 1 times [2021-11-05 13:23:38,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:38,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685045877] [2021-11-05 13:23:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:38,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:23:38,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:38,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685045877] [2021-11-05 13:23:38,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685045877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:38,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:38,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:23:38,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525316500] [2021-11-05 13:23:38,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:38,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:23:38,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:38,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:23:38,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:23:38,123 INFO L87 Difference]: Start difference. First operand 125 states and 169 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-05 13:23:38,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:38,155 INFO L93 Difference]: Finished difference Result 230 states and 314 transitions. [2021-11-05 13:23:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 13:23:38,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 41 [2021-11-05 13:23:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:38,157 INFO L225 Difference]: With dead ends: 230 [2021-11-05 13:23:38,157 INFO L226 Difference]: Without dead ends: 119 [2021-11-05 13:23:38,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.05ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:23:38,158 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 140 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.85ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:38,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 270 Invalid, 34 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 25.85ms Time] [2021-11-05 13:23:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-05 13:23:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-05 13:23:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.391304347826087) internal successors, (160), 118 states have internal predecessors, (160), 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) [2021-11-05 13:23:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2021-11-05 13:23:38,164 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 41 [2021-11-05 13:23:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:38,165 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2021-11-05 13:23:38,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-05 13:23:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2021-11-05 13:23:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 13:23:38,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:38,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:38,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-05 13:23:38,167 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:38,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1666510959, now seen corresponding path program 1 times [2021-11-05 13:23:38,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:38,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127368986] [2021-11-05 13:23:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:38,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:23:38,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:38,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127368986] [2021-11-05 13:23:38,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127368986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:38,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:38,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:23:38,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326005248] [2021-11-05 13:23:38,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:38,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:23:38,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:38,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:23:38,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:23:38,232 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-05 13:23:38,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:38,279 INFO L93 Difference]: Finished difference Result 228 states and 298 transitions. [2021-11-05 13:23:38,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 13:23:38,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 41 [2021-11-05 13:23:38,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:38,280 INFO L225 Difference]: With dead ends: 228 [2021-11-05 13:23:38,281 INFO L226 Difference]: Without dead ends: 137 [2021-11-05 13:23:38,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.62ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:23:38,285 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 18 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.56ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.45ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:38,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 422 Invalid, 29 Unknown, 0 Unchecked, 4.56ms Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 27.45ms Time] [2021-11-05 13:23:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-05 13:23:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 119. [2021-11-05 13:23:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.373913043478261) internal successors, (158), 118 states have internal predecessors, (158), 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) [2021-11-05 13:23:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2021-11-05 13:23:38,299 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 41 [2021-11-05 13:23:38,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:38,300 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2021-11-05 13:23:38,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-05 13:23:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2021-11-05 13:23:38,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-05 13:23:38,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:38,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:38,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-05 13:23:38,302 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:38,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:38,302 INFO L85 PathProgramCache]: Analyzing trace with hash -423042159, now seen corresponding path program 1 times [2021-11-05 13:23:38,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:38,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062870330] [2021-11-05 13:23:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:38,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:23:38,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:38,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062870330] [2021-11-05 13:23:38,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062870330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:38,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:38,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-05 13:23:38,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684633361] [2021-11-05 13:23:38,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:38,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-05 13:23:38,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-05 13:23:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-05 13:23:38,380 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:23:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:38,510 INFO L93 Difference]: Finished difference Result 242 states and 315 transitions. [2021-11-05 13:23:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-05 13:23:38,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-05 13:23:38,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:38,511 INFO L225 Difference]: With dead ends: 242 [2021-11-05 13:23:38,512 INFO L226 Difference]: Without dead ends: 152 [2021-11-05 13:23:38,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 46.90ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:23:38,513 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 458 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.63ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.99ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:38,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 223 Invalid, 94 Unknown, 0 Unchecked, 1.63ms Time], IncrementalHoareTripleChecker [30 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 83.99ms Time] [2021-11-05 13:23:38,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-05 13:23:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2021-11-05 13:23:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.3478260869565217) internal successors, (155), 118 states have internal predecessors, (155), 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) [2021-11-05 13:23:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2021-11-05 13:23:38,518 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 45 [2021-11-05 13:23:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:38,518 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2021-11-05 13:23:38,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:23:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2021-11-05 13:23:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-05 13:23:38,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:38,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:38,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-05 13:23:38,520 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:38,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2072078671, now seen corresponding path program 1 times [2021-11-05 13:23:38,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:38,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531744619] [2021-11-05 13:23:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:38,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:23:38,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:38,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531744619] [2021-11-05 13:23:38,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531744619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:38,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:38,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-05 13:23:38,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558715814] [2021-11-05 13:23:38,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:38,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 13:23:38,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:38,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 13:23:38,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-05 13:23:38,600 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2021-11-05 13:23:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:38,846 INFO L93 Difference]: Finished difference Result 334 states and 430 transitions. [2021-11-05 13:23:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-05 13:23:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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 49 [2021-11-05 13:23:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:38,848 INFO L225 Difference]: With dead ends: 334 [2021-11-05 13:23:38,848 INFO L226 Difference]: Without dead ends: 243 [2021-11-05 13:23:38,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 103.13ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-05 13:23:38,850 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 819 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.36ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:38,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 346 Invalid, 180 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [63 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 140.36ms Time] [2021-11-05 13:23:38,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-05 13:23:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 122. [2021-11-05 13:23:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.3389830508474576) internal successors, (158), 121 states have internal predecessors, (158), 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) [2021-11-05 13:23:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2021-11-05 13:23:38,856 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 49 [2021-11-05 13:23:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:38,857 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2021-11-05 13:23:38,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2021-11-05 13:23:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2021-11-05 13:23:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-05 13:23:38,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:38,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:38,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-05 13:23:38,858 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:38,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:38,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1006498608, now seen corresponding path program 1 times [2021-11-05 13:23:38,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:38,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927822911] [2021-11-05 13:23:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:38,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:23:38,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:38,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927822911] [2021-11-05 13:23:38,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927822911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:38,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:38,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-05 13:23:38,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093502316] [2021-11-05 13:23:38,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:38,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-05 13:23:38,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:38,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-05 13:23:38,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-05 13:23:38,937 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2021-11-05 13:23:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:39,088 INFO L93 Difference]: Finished difference Result 327 states and 416 transitions. [2021-11-05 13:23:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-05 13:23:39,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 51 [2021-11-05 13:23:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:39,090 INFO L225 Difference]: With dead ends: 327 [2021-11-05 13:23:39,090 INFO L226 Difference]: Without dead ends: 234 [2021-11-05 13:23:39,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.98ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:23:39,091 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 606 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.02ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.00ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:39,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 308 Invalid, 134 Unknown, 0 Unchecked, 2.02ms Time], IncrementalHoareTripleChecker [39 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 105.00ms Time] [2021-11-05 13:23:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-05 13:23:39,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 125. [2021-11-05 13:23:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.3305785123966942) internal successors, (161), 124 states have internal predecessors, (161), 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) [2021-11-05 13:23:39,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 161 transitions. [2021-11-05 13:23:39,097 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 161 transitions. Word has length 51 [2021-11-05 13:23:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:39,098 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 161 transitions. [2021-11-05 13:23:39,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2021-11-05 13:23:39,098 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 161 transitions. [2021-11-05 13:23:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-05 13:23:39,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:39,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:39,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-05 13:23:39,099 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:39,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1179077135, now seen corresponding path program 1 times [2021-11-05 13:23:39,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:39,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572129759] [2021-11-05 13:23:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:39,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:23:39,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:39,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572129759] [2021-11-05 13:23:39,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572129759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:39,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:39,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:23:39,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464419099] [2021-11-05 13:23:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:39,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:23:39,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:23:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:23:39,152 INFO L87 Difference]: Start difference. First operand 125 states and 161 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-11-05 13:23:39,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:39,212 INFO L93 Difference]: Finished difference Result 244 states and 316 transitions. [2021-11-05 13:23:39,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 13:23:39,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2021-11-05 13:23:39,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:39,215 INFO L225 Difference]: With dead ends: 244 [2021-11-05 13:23:39,215 INFO L226 Difference]: Without dead ends: 141 [2021-11-05 13:23:39,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.25ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:23:39,217 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 9 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.33ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:39,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 392 Invalid, 72 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 50.33ms Time] [2021-11-05 13:23:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-05 13:23:39,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-11-05 13:23:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.310077519379845) internal successors, (169), 132 states have internal predecessors, (169), 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) [2021-11-05 13:23:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 169 transitions. [2021-11-05 13:23:39,223 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 169 transitions. Word has length 61 [2021-11-05 13:23:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:39,223 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 169 transitions. [2021-11-05 13:23:39,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-11-05 13:23:39,224 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 169 transitions. [2021-11-05 13:23:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-05 13:23:39,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:39,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:39,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-05 13:23:39,226 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:39,227 INFO L85 PathProgramCache]: Analyzing trace with hash -192730163, now seen corresponding path program 1 times [2021-11-05 13:23:39,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:39,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641378969] [2021-11-05 13:23:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:39,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:23:39,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:39,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641378969] [2021-11-05 13:23:39,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641378969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:39,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:39,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 13:23:39,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746835641] [2021-11-05 13:23:39,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:39,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 13:23:39,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:39,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 13:23:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-05 13:23:39,351 INFO L87 Difference]: Start difference. First operand 133 states and 169 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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) [2021-11-05 13:23:39,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:39,567 INFO L93 Difference]: Finished difference Result 362 states and 457 transitions. [2021-11-05 13:23:39,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-05 13:23:39,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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 61 [2021-11-05 13:23:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:39,569 INFO L225 Difference]: With dead ends: 362 [2021-11-05 13:23:39,569 INFO L226 Difference]: Without dead ends: 251 [2021-11-05 13:23:39,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 85.15ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-05 13:23:39,570 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 761 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.07ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.77ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:39,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 449 Invalid, 254 Unknown, 0 Unchecked, 3.07ms Time], IncrementalHoareTripleChecker [80 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 133.77ms Time] [2021-11-05 13:23:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-05 13:23:39,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 136. [2021-11-05 13:23:39,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.303030303030303) internal successors, (172), 135 states have internal predecessors, (172), 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) [2021-11-05 13:23:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2021-11-05 13:23:39,577 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 61 [2021-11-05 13:23:39,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:39,577 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2021-11-05 13:23:39,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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) [2021-11-05 13:23:39,578 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2021-11-05 13:23:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-05 13:23:39,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:39,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:39,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-05 13:23:39,579 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:39,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash 930930641, now seen corresponding path program 1 times [2021-11-05 13:23:39,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:39,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440226080] [2021-11-05 13:23:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:39,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:23:39,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:39,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440226080] [2021-11-05 13:23:39,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440226080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:39,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:39,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-05 13:23:39,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862825365] [2021-11-05 13:23:39,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:39,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 13:23:39,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:39,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 13:23:39,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:23:39,643 INFO L87 Difference]: Start difference. First operand 136 states and 172 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2021-11-05 13:23:39,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:39,699 INFO L93 Difference]: Finished difference Result 289 states and 354 transitions. [2021-11-05 13:23:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 13:23:39,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 61 [2021-11-05 13:23:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:39,700 INFO L225 Difference]: With dead ends: 289 [2021-11-05 13:23:39,701 INFO L226 Difference]: Without dead ends: 184 [2021-11-05 13:23:39,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.34ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-05 13:23:39,702 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 52 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.23ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:39,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 592 Invalid, 63 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 37.23ms Time] [2021-11-05 13:23:39,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-05 13:23:39,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 136. [2021-11-05 13:23:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.2878787878787878) internal successors, (170), 135 states have internal predecessors, (170), 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) [2021-11-05 13:23:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 170 transitions. [2021-11-05 13:23:39,707 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 170 transitions. Word has length 61 [2021-11-05 13:23:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:39,708 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 170 transitions. [2021-11-05 13:23:39,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2021-11-05 13:23:39,708 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 170 transitions. [2021-11-05 13:23:39,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-05 13:23:39,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:39,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:39,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-05 13:23:39,717 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:39,718 INFO L85 PathProgramCache]: Analyzing trace with hash -961072015, now seen corresponding path program 1 times [2021-11-05 13:23:39,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:39,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67733199] [2021-11-05 13:23:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:39,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:23:39,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:39,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67733199] [2021-11-05 13:23:39,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67733199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:23:39,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933082179] [2021-11-05 13:23:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:39,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:23:39,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:23:39,859 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) [2021-11-05 13:23:39,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-05 13:23:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:40,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-05 13:23:40,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:23:40,185 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-05 13:23:40,186 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-05 13:23:40,220 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-05 13:23:40,220 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-05 13:23:41,385 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-05 13:23:41,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 89 [2021-11-05 13:23:41,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:23:41,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 89 [2021-11-05 13:23:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:23:41,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:23:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:23:41,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933082179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:23:41,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:23:41,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2021-11-05 13:23:41,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079287838] [2021-11-05 13:23:41,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:23:41,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-05 13:23:41,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-05 13:23:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-05 13:23:41,684 INFO L87 Difference]: Start difference. First operand 136 states and 170 transitions. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 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) [2021-11-05 13:23:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:42,522 INFO L93 Difference]: Finished difference Result 599 states and 730 transitions. [2021-11-05 13:23:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-05 13:23:42,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 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 65 [2021-11-05 13:23:42,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:42,525 INFO L225 Difference]: With dead ends: 599 [2021-11-05 13:23:42,525 INFO L226 Difference]: Without dead ends: 496 [2021-11-05 13:23:42,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 717.75ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-11-05 13:23:42,526 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 811 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 304.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.07ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 791 IncrementalHoareTripleChecker+Unchecked, 385.14ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:42,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 1542 Invalid, 1328 Unknown, 0 Unchecked, 7.07ms Time], IncrementalHoareTripleChecker [65 Valid, 472 Invalid, 0 Unknown, 791 Unchecked, 385.14ms Time] [2021-11-05 13:23:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-05 13:23:42,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 190. [2021-11-05 13:23:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.2849462365591398) internal successors, (239), 189 states have internal predecessors, (239), 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) [2021-11-05 13:23:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 239 transitions. [2021-11-05 13:23:42,539 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 239 transitions. Word has length 65 [2021-11-05 13:23:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:42,539 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 239 transitions. [2021-11-05 13:23:42,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 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) [2021-11-05 13:23:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 239 transitions. [2021-11-05 13:23:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-05 13:23:42,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:42,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:42,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-05 13:23:42,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-05 13:23:42,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:42,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1167005937, now seen corresponding path program 1 times [2021-11-05 13:23:42,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:42,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665014180] [2021-11-05 13:23:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:42,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:23:42,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:42,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665014180] [2021-11-05 13:23:42,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665014180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:42,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:42,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 13:23:42,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487721928] [2021-11-05 13:23:42,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:42,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 13:23:42,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:42,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 13:23:42,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-05 13:23:42,919 INFO L87 Difference]: Start difference. First operand 190 states and 239 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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) [2021-11-05 13:23:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:43,230 INFO L93 Difference]: Finished difference Result 520 states and 662 transitions. [2021-11-05 13:23:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-05 13:23:43,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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 65 [2021-11-05 13:23:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:43,232 INFO L225 Difference]: With dead ends: 520 [2021-11-05 13:23:43,232 INFO L226 Difference]: Without dead ends: 357 [2021-11-05 13:23:43,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 111.96ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-05 13:23:43,233 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 485 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.50ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 207.06ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:43,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 631 Invalid, 335 Unknown, 0 Unchecked, 3.50ms Time], IncrementalHoareTripleChecker [47 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 207.06ms Time] [2021-11-05 13:23:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-05 13:23:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 310. [2021-11-05 13:23:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.2908496732026145) internal successors, (395), 309 states have internal predecessors, (395), 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) [2021-11-05 13:23:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 395 transitions. [2021-11-05 13:23:43,251 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 395 transitions. Word has length 65 [2021-11-05 13:23:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:43,251 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 395 transitions. [2021-11-05 13:23:43,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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) [2021-11-05 13:23:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 395 transitions. [2021-11-05 13:23:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-05 13:23:43,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:43,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:43,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-05 13:23:43,253 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:43,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1164925684, now seen corresponding path program 1 times [2021-11-05 13:23:43,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:43,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101590708] [2021-11-05 13:23:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:43,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:23:43,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:43,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101590708] [2021-11-05 13:23:43,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101590708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:43,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:43,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 13:23:43,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206077774] [2021-11-05 13:23:43,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:43,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 13:23:43,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 13:23:43,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-05 13:23:43,572 INFO L87 Difference]: Start difference. First operand 310 states and 395 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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) [2021-11-05 13:23:43,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:43,886 INFO L93 Difference]: Finished difference Result 471 states and 593 transitions. [2021-11-05 13:23:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-05 13:23:43,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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 67 [2021-11-05 13:23:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:43,889 INFO L225 Difference]: With dead ends: 471 [2021-11-05 13:23:43,889 INFO L226 Difference]: Without dead ends: 403 [2021-11-05 13:23:43,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 189.59ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-05 13:23:43,890 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 522 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 132.65ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:43,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 434 Invalid, 205 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [29 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 132.65ms Time] [2021-11-05 13:23:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-05 13:23:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 314. [2021-11-05 13:23:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 310 states have (on average 1.2870967741935484) internal successors, (399), 313 states have internal predecessors, (399), 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) [2021-11-05 13:23:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 399 transitions. [2021-11-05 13:23:43,907 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 399 transitions. Word has length 67 [2021-11-05 13:23:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:43,908 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 399 transitions. [2021-11-05 13:23:43,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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) [2021-11-05 13:23:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 399 transitions. [2021-11-05 13:23:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-05 13:23:43,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:43,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:43,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-05 13:23:43,910 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:43,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1166772726, now seen corresponding path program 1 times [2021-11-05 13:23:43,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:43,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111999955] [2021-11-05 13:23:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:43,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:23:44,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:44,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111999955] [2021-11-05 13:23:44,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111999955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:44,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:44,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-05 13:23:44,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736444432] [2021-11-05 13:23:44,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:44,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-05 13:23:44,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:44,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-05 13:23:44,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:23:44,166 INFO L87 Difference]: Start difference. First operand 314 states and 399 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 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) [2021-11-05 13:23:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:44,552 INFO L93 Difference]: Finished difference Result 482 states and 611 transitions. [2021-11-05 13:23:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-05 13:23:44,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 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 67 [2021-11-05 13:23:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:44,554 INFO L225 Difference]: With dead ends: 482 [2021-11-05 13:23:44,554 INFO L226 Difference]: Without dead ends: 366 [2021-11-05 13:23:44,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 188.72ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-05 13:23:44,555 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 836 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 197.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.46ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 240.96ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:44,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 866 Invalid, 399 Unknown, 0 Unchecked, 4.46ms Time], IncrementalHoareTripleChecker [61 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 240.96ms Time] [2021-11-05 13:23:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-05 13:23:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 322. [2021-11-05 13:23:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 318 states have (on average 1.2830188679245282) internal successors, (408), 321 states have internal predecessors, (408), 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) [2021-11-05 13:23:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 408 transitions. [2021-11-05 13:23:44,574 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 408 transitions. Word has length 67 [2021-11-05 13:23:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:44,575 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 408 transitions. [2021-11-05 13:23:44,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 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) [2021-11-05 13:23:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 408 transitions. [2021-11-05 13:23:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-05 13:23:44,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:44,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:44,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-05 13:23:44,577 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:44,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1353187208, now seen corresponding path program 1 times [2021-11-05 13:23:44,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:44,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396394761] [2021-11-05 13:23:44,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:44,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:23:44,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:44,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396394761] [2021-11-05 13:23:44,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396394761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:23:44,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:23:44,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-05 13:23:44,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899164184] [2021-11-05 13:23:44,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:23:44,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-05 13:23:44,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:23:44,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-05 13:23:44,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-05 13:23:44,892 INFO L87 Difference]: Start difference. First operand 322 states and 408 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 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) [2021-11-05 13:23:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:23:45,724 INFO L93 Difference]: Finished difference Result 1047 states and 1343 transitions. [2021-11-05 13:23:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-05 13:23:45,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 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 67 [2021-11-05 13:23:45,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:23:45,728 INFO L225 Difference]: With dead ends: 1047 [2021-11-05 13:23:45,728 INFO L226 Difference]: Without dead ends: 833 [2021-11-05 13:23:45,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 489.79ms TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2021-11-05 13:23:45,729 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 841 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 297.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.77ms SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 358.99ms IncrementalHoareTripleChecker+Time [2021-11-05 13:23:45,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 900 Invalid, 583 Unknown, 0 Unchecked, 5.77ms Time], IncrementalHoareTripleChecker [84 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 358.99ms Time] [2021-11-05 13:23:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-11-05 13:23:45,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 629. [2021-11-05 13:23:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 625 states have (on average 1.2768) internal successors, (798), 628 states have internal predecessors, (798), 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) [2021-11-05 13:23:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 798 transitions. [2021-11-05 13:23:45,787 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 798 transitions. Word has length 67 [2021-11-05 13:23:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:23:45,787 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 798 transitions. [2021-11-05 13:23:45,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 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) [2021-11-05 13:23:45,787 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 798 transitions. [2021-11-05 13:23:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-05 13:23:45,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:23:45,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:23:45,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-05 13:23:45,789 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:23:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:23:45,790 INFO L85 PathProgramCache]: Analyzing trace with hash -673128838, now seen corresponding path program 1 times [2021-11-05 13:23:45,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:23:45,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541423092] [2021-11-05 13:23:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:45,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:23:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:23:45,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:23:45,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541423092] [2021-11-05 13:23:45,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541423092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:23:45,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608136632] [2021-11-05 13:23:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:23:45,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:23:45,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:23:45,980 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) [2021-11-05 13:23:46,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-05 13:23:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:23:46,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-05 13:23:46,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:23:46,186 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-05 13:23:46,186 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 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-05 13:24:06,282 WARN L230 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-05 13:24:18,350 WARN L230 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-05 13:24:30,481 WARN L230 SmtUtils]: Spent 9.97s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-05 13:24:39,054 WARN L230 SmtUtils]: Spent 8.52s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-05 13:24:46,386 WARN L230 SmtUtils]: Spent 7.11s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-05 13:24:54,468 WARN L230 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-05 13:25:04,602 WARN L230 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-05 13:25:12,965 WARN L230 SmtUtils]: Spent 8.17s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-05 13:25:21,261 WARN L230 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-05 13:25:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:25:21,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:25:21,616 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 177 treesize of output 169 [2021-11-05 13:25:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:25:21,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608136632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:25:21,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:25:21,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2021-11-05 13:25:21,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695109763] [2021-11-05 13:25:21,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:25:21,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-05 13:25:21,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:25:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-05 13:25:21,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=685, Unknown=7, NotChecked=0, Total=812 [2021-11-05 13:25:21,710 INFO L87 Difference]: Start difference. First operand 629 states and 798 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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) [2021-11-05 13:25:31,796 WARN L230 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-05 13:25:51,844 WARN L230 SmtUtils]: Spent 20.03s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-11-05 13:25:52,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:25:52,096 INFO L93 Difference]: Finished difference Result 1225 states and 1553 transitions. [2021-11-05 13:25:52,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-05 13:25:52,097 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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 67 [2021-11-05 13:25:52,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:25:52,100 INFO L225 Difference]: With dead ends: 1225 [2021-11-05 13:25:52,100 INFO L226 Difference]: Without dead ends: 1047 [2021-11-05 13:25:52,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 124499.00ms TimeCoverageRelationStatistics Valid=145, Invalid=840, Unknown=7, NotChecked=0, Total=992 [2021-11-05 13:25:52,102 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 145 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 183.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.80ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 234.00ms IncrementalHoareTripleChecker+Time [2021-11-05 13:25:52,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1667 Invalid, 483 Unknown, 0 Unchecked, 3.80ms Time], IncrementalHoareTripleChecker [5 Valid, 367 Invalid, 0 Unknown, 111 Unchecked, 234.00ms Time] [2021-11-05 13:25:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-11-05 13:25:52,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 883. [2021-11-05 13:25:52,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 879 states have (on average 1.2559726962457338) internal successors, (1104), 882 states have internal predecessors, (1104), 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) [2021-11-05 13:25:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1104 transitions. [2021-11-05 13:25:52,154 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1104 transitions. Word has length 67 [2021-11-05 13:25:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:25:52,154 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1104 transitions. [2021-11-05 13:25:52,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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) [2021-11-05 13:25:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1104 transitions. [2021-11-05 13:25:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-05 13:25:52,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:25:52,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:25:52,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-05 13:25:52,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-05 13:25:52,380 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:25:52,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:25:52,381 INFO L85 PathProgramCache]: Analyzing trace with hash 27935740, now seen corresponding path program 1 times [2021-11-05 13:25:52,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:25:52,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378814735] [2021-11-05 13:25:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:25:52,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:25:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:25:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:25:52,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:25:52,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378814735] [2021-11-05 13:25:52,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378814735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:25:52,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:25:52,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-05 13:25:52,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363060225] [2021-11-05 13:25:52,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:25:52,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 13:25:52,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:25:52,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 13:25:52,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-05 13:25:52,477 INFO L87 Difference]: Start difference. First operand 883 states and 1104 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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) [2021-11-05 13:25:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:25:52,569 INFO L93 Difference]: Finished difference Result 1061 states and 1337 transitions. [2021-11-05 13:25:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 13:25:52,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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 67 [2021-11-05 13:25:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:25:52,572 INFO L225 Difference]: With dead ends: 1061 [2021-11-05 13:25:52,572 INFO L226 Difference]: Without dead ends: 875 [2021-11-05 13:25:52,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.86ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:25:52,574 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 460 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.04ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.26ms IncrementalHoareTripleChecker+Time [2021-11-05 13:25:52,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 292 Invalid, 46 Unknown, 0 Unchecked, 1.04ms Time], IncrementalHoareTripleChecker [18 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 24.26ms Time] [2021-11-05 13:25:52,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-05 13:25:52,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 875. [2021-11-05 13:25:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 871 states have (on average 1.2445464982778416) internal successors, (1084), 874 states have internal predecessors, (1084), 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) [2021-11-05 13:25:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1084 transitions. [2021-11-05 13:25:52,640 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1084 transitions. Word has length 67 [2021-11-05 13:25:52,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:25:52,640 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1084 transitions. [2021-11-05 13:25:52,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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) [2021-11-05 13:25:52,640 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1084 transitions. [2021-11-05 13:25:52,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-05 13:25:52,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:25:52,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:25:52,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-05 13:25:52,642 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:25:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:25:52,643 INFO L85 PathProgramCache]: Analyzing trace with hash 33598202, now seen corresponding path program 1 times [2021-11-05 13:25:52,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:25:52,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136905335] [2021-11-05 13:25:52,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:25:52,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:25:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:25:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:25:52,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:25:52,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136905335] [2021-11-05 13:25:52,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136905335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:25:52,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:25:52,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:25:52,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665148457] [2021-11-05 13:25:52,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:25:52,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:25:52,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:25:52,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:25:52,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:25:52,680 INFO L87 Difference]: Start difference. First operand 875 states and 1084 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-11-05 13:25:52,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:25:52,747 INFO L93 Difference]: Finished difference Result 1236 states and 1526 transitions. [2021-11-05 13:25:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 13:25:52,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 67 [2021-11-05 13:25:52,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:25:52,749 INFO L225 Difference]: With dead ends: 1236 [2021-11-05 13:25:52,749 INFO L226 Difference]: Without dead ends: 372 [2021-11-05 13:25:52,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.10ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:25:52,751 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 8 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.52ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.46ms IncrementalHoareTripleChecker+Time [2021-11-05 13:25:52,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 377 Invalid, 75 Unknown, 0 Unchecked, 0.52ms Time], IncrementalHoareTripleChecker [17 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 39.46ms Time] [2021-11-05 13:25:52,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-05 13:25:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 370. [2021-11-05 13:25:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 366 states have (on average 1.1994535519125684) internal successors, (439), 369 states have internal predecessors, (439), 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) [2021-11-05 13:25:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 439 transitions. [2021-11-05 13:25:52,773 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 439 transitions. Word has length 67 [2021-11-05 13:25:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:25:52,774 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 439 transitions. [2021-11-05 13:25:52,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-11-05 13:25:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 439 transitions. [2021-11-05 13:25:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-05 13:25:52,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:25:52,775 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:25:52,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-05 13:25:52,775 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:25:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:25:52,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1384277337, now seen corresponding path program 1 times [2021-11-05 13:25:52,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:25:52,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074988596] [2021-11-05 13:25:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:25:52,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:25:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:25:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:25:52,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:25:52,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074988596] [2021-11-05 13:25:52,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074988596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:25:52,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:25:52,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 13:25:52,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874081168] [2021-11-05 13:25:52,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:25:52,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 13:25:52,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:25:52,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 13:25:52,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-05 13:25:52,878 INFO L87 Difference]: Start difference. First operand 370 states and 439 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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) [2021-11-05 13:25:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:25:52,983 INFO L93 Difference]: Finished difference Result 440 states and 521 transitions. [2021-11-05 13:25:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 13:25:52,984 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 69 [2021-11-05 13:25:52,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:25:52,985 INFO L225 Difference]: With dead ends: 440 [2021-11-05 13:25:52,985 INFO L226 Difference]: Without dead ends: 370 [2021-11-05 13:25:52,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.96ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-05 13:25:52,987 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 649 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.52ms IncrementalHoareTripleChecker+Time [2021-11-05 13:25:52,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 146 Invalid, 88 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [36 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 49.52ms Time] [2021-11-05 13:25:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-05 13:25:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2021-11-05 13:25:53,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 366 states have (on average 1.1939890710382515) internal successors, (437), 369 states have internal predecessors, (437), 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) [2021-11-05 13:25:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 437 transitions. [2021-11-05 13:25:53,013 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 437 transitions. Word has length 69 [2021-11-05 13:25:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:25:53,014 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 437 transitions. [2021-11-05 13:25:53,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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) [2021-11-05 13:25:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 437 transitions. [2021-11-05 13:25:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-05 13:25:53,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:25:53,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:25:53,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-05 13:25:53,015 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:25:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:25:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash 80619544, now seen corresponding path program 1 times [2021-11-05 13:25:53,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:25:53,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764982855] [2021-11-05 13:25:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:25:53,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:25:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:25:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:25:53,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:25:53,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764982855] [2021-11-05 13:25:53,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764982855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:25:53,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777071441] [2021-11-05 13:25:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:25:53,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:25:53,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:25:53,223 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) [2021-11-05 13:25:53,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-05 13:25:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:25:53,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-05 13:25:53,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:25:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:25:53,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:25:53,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-05 13:25:53,569 INFO L354 Elim1Store]: treesize reduction 124, result has 18.4 percent of original size [2021-11-05 13:25:53,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 54 [2021-11-05 13:25:54,313 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-11-05 13:25:54,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 36 [2021-11-05 13:25:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:25:54,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:25:59,787 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 1666 treesize of output 1650 [2021-11-05 13:26:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:26:00,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777071441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:26:00,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:26:00,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2021-11-05 13:26:00,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945649603] [2021-11-05 13:26:00,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:26:00,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-05 13:26:00,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:26:00,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-05 13:26:00,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-11-05 13:26:00,256 INFO L87 Difference]: Start difference. First operand 370 states and 437 transitions. Second operand has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 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) [2021-11-05 13:26:01,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:26:01,241 INFO L93 Difference]: Finished difference Result 603 states and 705 transitions. [2021-11-05 13:26:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-05 13:26:01,242 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 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 69 [2021-11-05 13:26:01,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:26:01,244 INFO L225 Difference]: With dead ends: 603 [2021-11-05 13:26:01,244 INFO L226 Difference]: Without dead ends: 462 [2021-11-05 13:26:01,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 6022.42ms TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-11-05 13:26:01,245 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 859 mSDsluCounter, 2008 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 366.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.32ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 454.84ms IncrementalHoareTripleChecker+Time [2021-11-05 13:26:01,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 2164 Invalid, 872 Unknown, 0 Unchecked, 7.32ms Time], IncrementalHoareTripleChecker [46 Valid, 603 Invalid, 0 Unknown, 223 Unchecked, 454.84ms Time] [2021-11-05 13:26:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-05 13:26:01,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 329. [2021-11-05 13:26:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.1938461538461538) internal successors, (388), 328 states have internal predecessors, (388), 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) [2021-11-05 13:26:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 388 transitions. [2021-11-05 13:26:01,270 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 388 transitions. Word has length 69 [2021-11-05 13:26:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:26:01,270 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 388 transitions. [2021-11-05 13:26:01,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 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) [2021-11-05 13:26:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 388 transitions. [2021-11-05 13:26:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-05 13:26:01,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:26:01,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:26:01,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-05 13:26:01,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:26:01,496 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:26:01,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:26:01,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1040503474, now seen corresponding path program 1 times [2021-11-05 13:26:01,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:26:01,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111833239] [2021-11-05 13:26:01,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:01,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:26:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 13:26:01,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:26:01,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111833239] [2021-11-05 13:26:01,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111833239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:26:01,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:26:01,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:26:01,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041250012] [2021-11-05 13:26:01,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:26:01,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:26:01,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:26:01,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:26:01,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:26:01,543 INFO L87 Difference]: Start difference. First operand 329 states and 388 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-05 13:26:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:26:01,646 INFO L93 Difference]: Finished difference Result 687 states and 807 transitions. [2021-11-05 13:26:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 13:26:01,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 74 [2021-11-05 13:26:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:26:01,649 INFO L225 Difference]: With dead ends: 687 [2021-11-05 13:26:01,649 INFO L226 Difference]: Without dead ends: 431 [2021-11-05 13:26:01,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.81ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:26:01,651 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 93 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.84ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.09ms IncrementalHoareTripleChecker+Time [2021-11-05 13:26:01,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 291 Invalid, 73 Unknown, 0 Unchecked, 0.84ms Time], IncrementalHoareTripleChecker [17 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 60.09ms Time] [2021-11-05 13:26:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-05 13:26:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 309. [2021-11-05 13:26:01,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 305 states have (on average 1.1737704918032787) internal successors, (358), 308 states have internal predecessors, (358), 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) [2021-11-05 13:26:01,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 358 transitions. [2021-11-05 13:26:01,675 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 358 transitions. Word has length 74 [2021-11-05 13:26:01,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:26:01,675 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 358 transitions. [2021-11-05 13:26:01,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-05 13:26:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 358 transitions. [2021-11-05 13:26:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-05 13:26:01,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:26:01,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:26:01,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-05 13:26:01,678 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:26:01,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:26:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash 500105518, now seen corresponding path program 1 times [2021-11-05 13:26:01,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:26:01,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236149168] [2021-11-05 13:26:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:01,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:26:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:26:01,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:26:01,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236149168] [2021-11-05 13:26:01,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236149168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:26:01,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:26:01,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-05 13:26:01,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981847838] [2021-11-05 13:26:01,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:26:01,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 13:26:01,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:26:01,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 13:26:01,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-05 13:26:01,858 INFO L87 Difference]: Start difference. First operand 309 states and 358 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 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) [2021-11-05 13:26:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:26:02,216 INFO L93 Difference]: Finished difference Result 805 states and 920 transitions. [2021-11-05 13:26:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-05 13:26:02,216 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 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 74 [2021-11-05 13:26:02,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:26:02,218 INFO L225 Difference]: With dead ends: 805 [2021-11-05 13:26:02,218 INFO L226 Difference]: Without dead ends: 593 [2021-11-05 13:26:02,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 146.03ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:26:02,219 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 322 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.28ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 216.52ms IncrementalHoareTripleChecker+Time [2021-11-05 13:26:02,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 522 Invalid, 328 Unknown, 0 Unchecked, 2.28ms Time], IncrementalHoareTripleChecker [50 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 216.52ms Time] [2021-11-05 13:26:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-05 13:26:02,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 317. [2021-11-05 13:26:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 313 states have (on average 1.1693290734824282) internal successors, (366), 316 states have internal predecessors, (366), 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) [2021-11-05 13:26:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 366 transitions. [2021-11-05 13:26:02,244 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 366 transitions. Word has length 74 [2021-11-05 13:26:02,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:26:02,244 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 366 transitions. [2021-11-05 13:26:02,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 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) [2021-11-05 13:26:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 366 transitions. [2021-11-05 13:26:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-05 13:26:02,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:26:02,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:26:02,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-05 13:26:02,245 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:26:02,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:26:02,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1393591856, now seen corresponding path program 1 times [2021-11-05 13:26:02,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:26:02,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724685385] [2021-11-05 13:26:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:02,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:26:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-05 13:26:02,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:26:02,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724685385] [2021-11-05 13:26:02,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724685385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:26:02,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641551797] [2021-11-05 13:26:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:02,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:26:02,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:26:02,426 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) [2021-11-05 13:26:02,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-05 13:26:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:02,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-05 13:26:02,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:26:02,645 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-05 13:26:02,645 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 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-05 13:26:02,659 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-05 13:26:02,660 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-05 13:26:05,008 INFO L354 Elim1Store]: treesize reduction 48, result has 40.0 percent of original size [2021-11-05 13:26:05,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 92 [2021-11-05 13:26:05,040 INFO L354 Elim1Store]: treesize reduction 22, result has 64.5 percent of original size [2021-11-05 13:26:05,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 92 [2021-11-05 13:26:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:26:05,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:26:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:26:05,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641551797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:26:05,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:26:05,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 33 [2021-11-05 13:26:05,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061616714] [2021-11-05 13:26:05,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:26:05,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-05 13:26:05,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:26:05,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-05 13:26:05,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-11-05 13:26:05,769 INFO L87 Difference]: Start difference. First operand 317 states and 366 transitions. Second operand has 33 states, 33 states have (on average 5.7272727272727275) internal successors, (189), 33 states have internal predecessors, (189), 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) [2021-11-05 13:26:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:26:08,455 INFO L93 Difference]: Finished difference Result 758 states and 864 transitions. [2021-11-05 13:26:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-05 13:26:08,456 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.7272727272727275) internal successors, (189), 33 states have internal predecessors, (189), 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 74 [2021-11-05 13:26:08,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:26:08,458 INFO L225 Difference]: With dead ends: 758 [2021-11-05 13:26:08,458 INFO L226 Difference]: Without dead ends: 616 [2021-11-05 13:26:08,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2820.34ms TimeCoverageRelationStatistics Valid=293, Invalid=2359, Unknown=0, NotChecked=0, Total=2652 [2021-11-05 13:26:08,460 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 338 mSDsluCounter, 2374 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 492.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 2506 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.69ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 579.76ms IncrementalHoareTripleChecker+Time [2021-11-05 13:26:08,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 2506 Invalid, 1183 Unknown, 0 Unchecked, 6.69ms Time], IncrementalHoareTripleChecker [18 Valid, 1052 Invalid, 0 Unknown, 113 Unchecked, 579.76ms Time] [2021-11-05 13:26:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-05 13:26:08,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 365. [2021-11-05 13:26:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 361 states have (on average 1.1523545706371192) internal successors, (416), 364 states have internal predecessors, (416), 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) [2021-11-05 13:26:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 416 transitions. [2021-11-05 13:26:08,496 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 416 transitions. Word has length 74 [2021-11-05 13:26:08,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:26:08,496 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 416 transitions. [2021-11-05 13:26:08,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.7272727272727275) internal successors, (189), 33 states have internal predecessors, (189), 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) [2021-11-05 13:26:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 416 transitions. [2021-11-05 13:26:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-05 13:26:08,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:26:08,498 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:26:08,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-05 13:26:08,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:26:08,711 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:26:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:26:08,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1620082764, now seen corresponding path program 2 times [2021-11-05 13:26:08,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:26:08,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526471898] [2021-11-05 13:26:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:08,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:26:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-05 13:26:08,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:26:08,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526471898] [2021-11-05 13:26:08,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526471898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:26:08,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676488656] [2021-11-05 13:26:08,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 13:26:08,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:26:08,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:26:08,886 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) [2021-11-05 13:26:08,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-05 13:26:08,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-05 13:26:08,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 13:26:08,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-05 13:26:08,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:26:09,058 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-05 13:26:09,059 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-05 13:26:09,078 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-05 13:26:09,079 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-05 13:26:12,882 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-05 13:26:12,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 92 [2021-11-05 13:26:12,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:26:12,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 95 [2021-11-05 13:26:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-05 13:26:13,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 13:26:13,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676488656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:26:13,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 13:26:13,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 20 [2021-11-05 13:26:13,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365283790] [2021-11-05 13:26:13,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:26:13,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-05 13:26:13,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:26:13,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-05 13:26:13,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-11-05 13:26:13,036 INFO L87 Difference]: Start difference. First operand 365 states and 416 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 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) [2021-11-05 13:26:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:26:13,113 INFO L93 Difference]: Finished difference Result 432 states and 494 transitions. [2021-11-05 13:26:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-05 13:26:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 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 75 [2021-11-05 13:26:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:26:13,114 INFO L225 Difference]: With dead ends: 432 [2021-11-05 13:26:13,114 INFO L226 Difference]: Without dead ends: 356 [2021-11-05 13:26:13,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2161.17ms TimeCoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-05 13:26:13,115 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 27 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.96ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 24.34ms IncrementalHoareTripleChecker+Time [2021-11-05 13:26:13,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 858 Invalid, 213 Unknown, 0 Unchecked, 0.96ms Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 182 Unchecked, 24.34ms Time] [2021-11-05 13:26:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-05 13:26:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 312. [2021-11-05 13:26:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 308 states have (on average 1.155844155844156) internal successors, (356), 311 states have internal predecessors, (356), 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) [2021-11-05 13:26:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 356 transitions. [2021-11-05 13:26:13,141 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 356 transitions. Word has length 75 [2021-11-05 13:26:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:26:13,141 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 356 transitions. [2021-11-05 13:26:13,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 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) [2021-11-05 13:26:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 356 transitions. [2021-11-05 13:26:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-05 13:26:13,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:26:13,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:26:13,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-05 13:26:13,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-05 13:26:13,364 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:26:13,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:26:13,364 INFO L85 PathProgramCache]: Analyzing trace with hash 841974699, now seen corresponding path program 1 times [2021-11-05 13:26:13,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:26:13,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806812999] [2021-11-05 13:26:13,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:13,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:26:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:26:13,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:26:13,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806812999] [2021-11-05 13:26:13,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806812999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:26:13,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643013657] [2021-11-05 13:26:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:13,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:26:13,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:26:13,828 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) [2021-11-05 13:26:13,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-05 13:26:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:13,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-05 13:26:13,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:26:14,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-05 13:26:14,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-05 13:26:15,534 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-11-05 13:26:15,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 88 [2021-11-05 13:26:15,540 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-05 13:26:15,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 31 [2021-11-05 13:26:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:26:15,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:26:16,522 INFO L354 Elim1Store]: treesize reduction 331, result has 32.4 percent of original size [2021-11-05 13:26:16,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 3166 treesize of output 3000 [2021-11-05 13:26:16,783 INFO L354 Elim1Store]: treesize reduction 453, result has 25.0 percent of original size [2021-11-05 13:26:16,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 8647 treesize of output 8135 [2021-11-05 13:26:17,141 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-05 13:26:17,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 6593 treesize of output 6429 [2021-11-05 13:26:17,285 INFO L354 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2021-11-05 13:26:17,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 6425 treesize of output 6201 [2021-11-05 13:26:23,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:26:23,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2021-11-05 13:26:23,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-05 13:26:23,428 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-05 13:26:25,518 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-05 13:26:25,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 353 treesize of output 333 [2021-11-05 13:26:25,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:26:25,832 INFO L354 Elim1Store]: treesize reduction 20, result has 80.6 percent of original size [2021-11-05 13:26:25,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 322 treesize of output 376 [2021-11-05 13:26:26,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-05 13:26:26,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-11-05 13:26:26,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-05 13:26:26,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:26:26,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 129 [2021-11-05 13:26:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:26:27,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643013657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:26:27,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:26:27,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 22] total 48 [2021-11-05 13:26:27,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947826044] [2021-11-05 13:26:27,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:26:27,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-05 13:26:27,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:26:27,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-05 13:26:27,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1983, Unknown=0, NotChecked=0, Total=2256 [2021-11-05 13:26:27,150 INFO L87 Difference]: Start difference. First operand 312 states and 356 transitions. Second operand has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 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) [2021-11-05 13:26:36,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:26:36,801 INFO L93 Difference]: Finished difference Result 1090 states and 1210 transitions. [2021-11-05 13:26:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-05 13:26:36,801 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 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 77 [2021-11-05 13:26:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:26:36,804 INFO L225 Difference]: With dead ends: 1090 [2021-11-05 13:26:36,804 INFO L226 Difference]: Without dead ends: 923 [2021-11-05 13:26:36,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5239 ImplicationChecksByTransitivity, 8495.51ms TimeCoverageRelationStatistics Valid=4342, Invalid=13480, Unknown=0, NotChecked=0, Total=17822 [2021-11-05 13:26:36,809 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 6468 mSDsluCounter, 2898 mSDsCounter, 0 mSdLazyCounter, 2779 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1795.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6468 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 3754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.17ms SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 2779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2095.58ms IncrementalHoareTripleChecker+Time [2021-11-05 13:26:36,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6468 Valid, 2987 Invalid, 3754 Unknown, 0 Unchecked, 17.17ms Time], IncrementalHoareTripleChecker [975 Valid, 2779 Invalid, 0 Unknown, 0 Unchecked, 2095.58ms Time] [2021-11-05 13:26:36,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-11-05 13:26:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 385. [2021-11-05 13:26:36,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 381 states have (on average 1.1653543307086613) internal successors, (444), 384 states have internal predecessors, (444), 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) [2021-11-05 13:26:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 444 transitions. [2021-11-05 13:26:36,850 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 444 transitions. Word has length 77 [2021-11-05 13:26:36,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:26:36,850 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 444 transitions. [2021-11-05 13:26:36,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 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) [2021-11-05 13:26:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 444 transitions. [2021-11-05 13:26:36,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-05 13:26:36,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:26:36,852 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:26:36,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-05 13:26:37,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-05 13:26:37,064 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:26:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:26:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash 32628073, now seen corresponding path program 1 times [2021-11-05 13:26:37,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:26:37,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999334164] [2021-11-05 13:26:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:37,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:26:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:26:37,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:26:37,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999334164] [2021-11-05 13:26:37,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999334164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:26:37,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943349984] [2021-11-05 13:26:37,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:37,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:26:37,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:26:37,281 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) [2021-11-05 13:26:37,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-05 13:26:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:37,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-05 13:26:37,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:26:37,451 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-05 13:26:37,451 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 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-05 13:26:40,997 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 41 treesize of output 29 [2021-11-05 13:26:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:26:41,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:26:41,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 349 treesize of output 333 [2021-11-05 13:26:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:26:41,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943349984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:26:41,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:26:41,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 17] total 38 [2021-11-05 13:26:41,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512910566] [2021-11-05 13:26:41,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:26:41,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-05 13:26:41,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:26:41,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-05 13:26:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-11-05 13:26:41,474 INFO L87 Difference]: Start difference. First operand 385 states and 444 transitions. Second operand has 38 states, 38 states have (on average 4.421052631578948) internal successors, (168), 38 states have internal predecessors, (168), 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) [2021-11-05 13:26:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:26:41,995 INFO L93 Difference]: Finished difference Result 518 states and 581 transitions. [2021-11-05 13:26:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-05 13:26:41,995 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.421052631578948) internal successors, (168), 38 states have internal predecessors, (168), 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 77 [2021-11-05 13:26:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:26:41,997 INFO L225 Difference]: With dead ends: 518 [2021-11-05 13:26:41,997 INFO L226 Difference]: Without dead ends: 462 [2021-11-05 13:26:41,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 3226.15ms TimeCoverageRelationStatistics Valid=216, Invalid=1764, Unknown=0, NotChecked=0, Total=1980 [2021-11-05 13:26:41,998 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 244 mSDsluCounter, 2302 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 282.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.25ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 345.77ms IncrementalHoareTripleChecker+Time [2021-11-05 13:26:41,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 2440 Invalid, 969 Unknown, 0 Unchecked, 3.25ms Time], IncrementalHoareTripleChecker [16 Valid, 736 Invalid, 0 Unknown, 217 Unchecked, 345.77ms Time] [2021-11-05 13:26:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-05 13:26:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 385. [2021-11-05 13:26:42,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 381 states have (on average 1.162729658792651) internal successors, (443), 384 states have internal predecessors, (443), 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) [2021-11-05 13:26:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 443 transitions. [2021-11-05 13:26:42,042 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 443 transitions. Word has length 77 [2021-11-05 13:26:42,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:26:42,043 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 443 transitions. [2021-11-05 13:26:42,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.421052631578948) internal successors, (168), 38 states have internal predecessors, (168), 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) [2021-11-05 13:26:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 443 transitions. [2021-11-05 13:26:42,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-05 13:26:42,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:26:42,044 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:26:42,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-05 13:26:42,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:26:42,269 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:26:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:26:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash 420906986, now seen corresponding path program 2 times [2021-11-05 13:26:42,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:26:42,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843528081] [2021-11-05 13:26:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:42,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:26:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-05 13:26:42,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:26:42,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843528081] [2021-11-05 13:26:42,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843528081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:26:42,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637843690] [2021-11-05 13:26:42,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 13:26:42,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:26:42,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:26:42,477 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) [2021-11-05 13:26:42,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-05 13:26:42,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-05 13:26:42,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 13:26:42,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-05 13:26:42,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:26:42,621 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-05 13:26:42,621 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-05 13:26:42,639 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-05 13:26:42,639 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-05 13:26:46,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:26:46,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 120 [2021-11-05 13:26:46,403 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-11-05 13:26:46,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 102 [2021-11-05 13:26:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-05 13:26:49,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 13:26:49,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637843690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:26:49,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 13:26:49,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2021-11-05 13:26:49,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299433018] [2021-11-05 13:26:49,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:26:49,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-05 13:26:49,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:26:49,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-05 13:26:49,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=300, Unknown=4, NotChecked=0, Total=342 [2021-11-05 13:26:49,978 INFO L87 Difference]: Start difference. First operand 385 states and 443 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 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) [2021-11-05 13:26:53,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:26:53,219 INFO L93 Difference]: Finished difference Result 461 states and 534 transitions. [2021-11-05 13:26:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-05 13:26:53,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 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 77 [2021-11-05 13:26:53,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:26:53,221 INFO L225 Difference]: With dead ends: 461 [2021-11-05 13:26:53,221 INFO L226 Difference]: Without dead ends: 383 [2021-11-05 13:26:53,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 9105.40ms TimeCoverageRelationStatistics Valid=46, Invalid=368, Unknown=6, NotChecked=0, Total=420 [2021-11-05 13:26:53,222 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 6 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 21.62ms IncrementalHoareTripleChecker+Time [2021-11-05 13:26:53,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 834 Invalid, 201 Unknown, 0 Unchecked, 0.74ms Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 172 Unchecked, 21.62ms Time] [2021-11-05 13:26:53,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-05 13:26:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2021-11-05 13:26:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 379 states have (on average 1.1556728232189974) internal successors, (438), 382 states have internal predecessors, (438), 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) [2021-11-05 13:26:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 438 transitions. [2021-11-05 13:26:53,260 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 438 transitions. Word has length 77 [2021-11-05 13:26:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:26:53,260 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 438 transitions. [2021-11-05 13:26:53,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 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) [2021-11-05 13:26:53,260 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 438 transitions. [2021-11-05 13:26:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-05 13:26:53,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:26:53,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:26:53,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-05 13:26:53,486 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,SelfDestructingSolverStorable27 [2021-11-05 13:26:53,486 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:26:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:26:53,487 INFO L85 PathProgramCache]: Analyzing trace with hash 561523053, now seen corresponding path program 1 times [2021-11-05 13:26:53,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:26:53,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501882866] [2021-11-05 13:26:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:53,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:26:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-05 13:26:53,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:26:53,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501882866] [2021-11-05 13:26:53,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501882866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:26:53,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:26:53,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-05 13:26:53,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265740291] [2021-11-05 13:26:53,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:26:53,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-05 13:26:53,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:26:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-05 13:26:53,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-05 13:26:53,558 INFO L87 Difference]: Start difference. First operand 383 states and 438 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-11-05 13:26:53,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:26:53,685 INFO L93 Difference]: Finished difference Result 471 states and 537 transitions. [2021-11-05 13:26:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 13:26:53,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 80 [2021-11-05 13:26:53,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:26:53,687 INFO L225 Difference]: With dead ends: 471 [2021-11-05 13:26:53,687 INFO L226 Difference]: Without dead ends: 458 [2021-11-05 13:26:53,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.01ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-05 13:26:53,688 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 121 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.71ms IncrementalHoareTripleChecker+Time [2021-11-05 13:26:53,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 566 Invalid, 88 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [11 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 53.71ms Time] [2021-11-05 13:26:53,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-05 13:26:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 390. [2021-11-05 13:26:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 386 states have (on average 1.145077720207254) internal successors, (442), 389 states have internal predecessors, (442), 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) [2021-11-05 13:26:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 442 transitions. [2021-11-05 13:26:53,729 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 442 transitions. Word has length 80 [2021-11-05 13:26:53,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:26:53,729 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 442 transitions. [2021-11-05 13:26:53,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-11-05 13:26:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 442 transitions. [2021-11-05 13:26:53,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-05 13:26:53,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:26:53,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:26:53,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-05 13:26:53,731 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:26:53,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:26:53,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1542092017, now seen corresponding path program 1 times [2021-11-05 13:26:53,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:26:53,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534771778] [2021-11-05 13:26:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:53,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:26:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-05 13:26:53,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:26:53,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534771778] [2021-11-05 13:26:53,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534771778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:26:53,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:26:53,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:26:53,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767643924] [2021-11-05 13:26:53,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:26:53,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:26:53,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:26:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:26:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:26:53,833 INFO L87 Difference]: Start difference. First operand 390 states and 442 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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) [2021-11-05 13:26:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:26:53,941 INFO L93 Difference]: Finished difference Result 390 states and 442 transitions. [2021-11-05 13:26:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 13:26:53,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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) Word has length 82 [2021-11-05 13:26:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:26:53,943 INFO L225 Difference]: With dead ends: 390 [2021-11-05 13:26:53,943 INFO L226 Difference]: Without dead ends: 388 [2021-11-05 13:26:53,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.89ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:26:53,945 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 43 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.14ms IncrementalHoareTripleChecker+Time [2021-11-05 13:26:53,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 245 Invalid, 60 Unknown, 0 Unchecked, 0.49ms Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 62.14ms Time] [2021-11-05 13:26:53,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-05 13:26:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2021-11-05 13:26:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 385 states have (on average 1.1376623376623376) internal successors, (438), 387 states have internal predecessors, (438), 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) [2021-11-05 13:26:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 438 transitions. [2021-11-05 13:26:53,985 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 438 transitions. Word has length 82 [2021-11-05 13:26:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:26:53,985 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 438 transitions. [2021-11-05 13:26:53,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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) [2021-11-05 13:26:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 438 transitions. [2021-11-05 13:26:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-05 13:26:53,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:26:53,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:26:53,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-05 13:26:53,987 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:26:53,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:26:53,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1488938402, now seen corresponding path program 1 times [2021-11-05 13:26:53,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:26:53,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608420772] [2021-11-05 13:26:53,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:53,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:26:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-05 13:26:54,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:26:54,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608420772] [2021-11-05 13:26:54,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608420772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:26:54,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:26:54,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 13:26:54,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183559828] [2021-11-05 13:26:54,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:26:54,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 13:26:54,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:26:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 13:26:54,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-05 13:26:54,257 INFO L87 Difference]: Start difference. First operand 388 states and 438 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:26:54,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:26:54,457 INFO L93 Difference]: Finished difference Result 388 states and 438 transitions. [2021-11-05 13:26:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-05 13:26:54,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-05 13:26:54,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:26:54,459 INFO L225 Difference]: With dead ends: 388 [2021-11-05 13:26:54,459 INFO L226 Difference]: Without dead ends: 386 [2021-11-05 13:26:54,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 82.58ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:26:54,460 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 174 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.00ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.82ms IncrementalHoareTripleChecker+Time [2021-11-05 13:26:54,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 341 Invalid, 117 Unknown, 0 Unchecked, 1.00ms Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 103.82ms Time] [2021-11-05 13:26:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-05 13:26:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-11-05 13:26:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 384 states have (on average 1.1302083333333333) internal successors, (434), 385 states have internal predecessors, (434), 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) [2021-11-05 13:26:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 434 transitions. [2021-11-05 13:26:54,501 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 434 transitions. Word has length 85 [2021-11-05 13:26:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:26:54,501 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 434 transitions. [2021-11-05 13:26:54,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:26:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 434 transitions. [2021-11-05 13:26:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-05 13:26:54,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:26:54,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:26:54,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-05 13:26:54,504 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:26:54,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:26:54,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1748357123, now seen corresponding path program 1 times [2021-11-05 13:26:54,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:26:54,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165469686] [2021-11-05 13:26:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:54,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:26:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:26:54,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:26:54,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165469686] [2021-11-05 13:26:54,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165469686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:26:54,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276580135] [2021-11-05 13:26:54,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:26:54,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:26:54,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:26:54,957 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) [2021-11-05 13:26:54,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-05 13:26:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:26:55,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-05 13:26:55,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:26:55,131 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-05 13:26:55,131 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-05 13:26:55,146 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-05 13:26:55,146 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-05 13:27:00,314 INFO L354 Elim1Store]: treesize reduction 103, result has 30.9 percent of original size [2021-11-05 13:27:00,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 143 [2021-11-05 13:27:00,355 INFO L354 Elim1Store]: treesize reduction 45, result has 53.6 percent of original size [2021-11-05 13:27:00,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 117 treesize of output 120 [2021-11-05 13:27:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:27:00,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:27:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:27:01,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276580135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:27:01,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:27:01,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 16] total 41 [2021-11-05 13:27:01,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813044022] [2021-11-05 13:27:01,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:27:01,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-05 13:27:01,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:27:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-05 13:27:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1492, Unknown=0, NotChecked=0, Total=1640 [2021-11-05 13:27:01,078 INFO L87 Difference]: Start difference. First operand 386 states and 434 transitions. Second operand has 41 states, 41 states have (on average 4.585365853658536) internal successors, (188), 41 states have internal predecessors, (188), 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) [2021-11-05 13:27:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:27:01,955 INFO L93 Difference]: Finished difference Result 475 states and 529 transitions. [2021-11-05 13:27:01,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-05 13:27:01,955 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.585365853658536) internal successors, (188), 41 states have internal predecessors, (188), 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 85 [2021-11-05 13:27:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:27:01,956 INFO L225 Difference]: With dead ends: 475 [2021-11-05 13:27:01,957 INFO L226 Difference]: Without dead ends: 425 [2021-11-05 13:27:01,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 3381.22ms TimeCoverageRelationStatistics Valid=263, Invalid=2707, Unknown=0, NotChecked=0, Total=2970 [2021-11-05 13:27:01,958 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 241 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 266.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 314.77ms IncrementalHoareTripleChecker+Time [2021-11-05 13:27:01,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1558 Invalid, 773 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [38 Valid, 498 Invalid, 0 Unknown, 237 Unchecked, 314.77ms Time] [2021-11-05 13:27:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-05 13:27:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 391. [2021-11-05 13:27:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 389 states have (on average 1.1311053984575836) internal successors, (440), 390 states have internal predecessors, (440), 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) [2021-11-05 13:27:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 440 transitions. [2021-11-05 13:27:01,993 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 440 transitions. Word has length 85 [2021-11-05 13:27:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:27:01,993 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 440 transitions. [2021-11-05 13:27:01,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.585365853658536) internal successors, (188), 41 states have internal predecessors, (188), 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) [2021-11-05 13:27:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 440 transitions. [2021-11-05 13:27:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-05 13:27:01,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:27:01,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:27:02,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-05 13:27:02,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:27:02,219 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:27:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:27:02,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1737263547, now seen corresponding path program 1 times [2021-11-05 13:27:02,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:27:02,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44916453] [2021-11-05 13:27:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:27:02,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:27:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:27:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:27:02,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:27:02,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44916453] [2021-11-05 13:27:02,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44916453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:27:02,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32218537] [2021-11-05 13:27:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:27:02,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:27:02,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:27:02,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 13:27:02,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-05 13:27:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:27:02,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-05 13:27:02,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:27:02,688 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-05 13:27:02,689 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-05 13:27:02,704 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-05 13:27:02,704 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-05 13:27:08,190 INFO L354 Elim1Store]: treesize reduction 66, result has 17.5 percent of original size [2021-11-05 13:27:08,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 71 [2021-11-05 13:27:08,230 INFO L354 Elim1Store]: treesize reduction 22, result has 64.5 percent of original size [2021-11-05 13:27:08,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2021-11-05 13:27:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:27:08,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:27:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:27:08,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32218537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:27:08,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:27:08,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 12] total 37 [2021-11-05 13:27:08,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093106755] [2021-11-05 13:27:08,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:27:08,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-05 13:27:08,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:27:08,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-05 13:27:08,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2021-11-05 13:27:08,975 INFO L87 Difference]: Start difference. First operand 391 states and 440 transitions. Second operand has 37 states, 37 states have (on average 6.162162162162162) internal successors, (228), 37 states have internal predecessors, (228), 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) [2021-11-05 13:27:09,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:27:09,446 INFO L93 Difference]: Finished difference Result 504 states and 554 transitions. [2021-11-05 13:27:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-05 13:27:09,446 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.162162162162162) internal successors, (228), 37 states have internal predecessors, (228), 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 85 [2021-11-05 13:27:09,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:27:09,447 INFO L225 Difference]: With dead ends: 504 [2021-11-05 13:27:09,448 INFO L226 Difference]: Without dead ends: 451 [2021-11-05 13:27:09,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 4039.11ms TimeCoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-11-05 13:27:09,449 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 268 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 204.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.21ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 251.22ms IncrementalHoareTripleChecker+Time [2021-11-05 13:27:09,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 1182 Invalid, 470 Unknown, 0 Unchecked, 2.21ms Time], IncrementalHoareTripleChecker [18 Valid, 383 Invalid, 0 Unknown, 69 Unchecked, 251.22ms Time] [2021-11-05 13:27:09,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-05 13:27:09,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 372. [2021-11-05 13:27:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 370 states have (on average 1.1189189189189188) internal successors, (414), 371 states have internal predecessors, (414), 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) [2021-11-05 13:27:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 414 transitions. [2021-11-05 13:27:09,480 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 414 transitions. Word has length 85 [2021-11-05 13:27:09,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:27:09,480 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 414 transitions. [2021-11-05 13:27:09,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.162162162162162) internal successors, (228), 37 states have internal predecessors, (228), 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) [2021-11-05 13:27:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 414 transitions. [2021-11-05 13:27:09,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-05 13:27:09,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:27:09,481 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:27:09,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-05 13:27:09,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-05 13:27:09,705 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:27:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:27:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1881366369, now seen corresponding path program 1 times [2021-11-05 13:27:09,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:27:09,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614562596] [2021-11-05 13:27:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:27:09,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:27:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:27:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-05 13:27:09,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:27:09,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614562596] [2021-11-05 13:27:09,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614562596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:27:09,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432941634] [2021-11-05 13:27:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:27:09,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:27:09,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:27:09,928 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 13:27:09,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-05 13:27:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:27:10,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-05 13:27:10,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:27:10,116 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-05 13:27:10,116 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-05 13:27:10,131 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-05 13:27:10,131 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-05 13:27:13,318 INFO L354 Elim1Store]: treesize reduction 52, result has 35.0 percent of original size [2021-11-05 13:27:13,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 93 [2021-11-05 13:27:13,400 INFO L354 Elim1Store]: treesize reduction 50, result has 65.8 percent of original size [2021-11-05 13:27:13,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 144 [2021-11-05 13:27:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:27:13,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:27:14,454 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 959 treesize of output 943 [2021-11-05 13:27:14,862 INFO L354 Elim1Store]: treesize reduction 292, result has 41.4 percent of original size [2021-11-05 13:27:14,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 3683 treesize of output 3522 [2021-11-05 13:27:14,974 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-05 13:27:14,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3466 treesize of output 3124 [2021-11-05 13:27:37,129 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-11-05 13:27:37,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 158 [2021-11-05 13:27:38,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:27:38,111 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-11-05 13:27:38,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 116 [2021-11-05 13:27:38,623 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-05 13:27:38,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 387 treesize of output 365 [2021-11-05 13:27:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:27:40,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432941634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:27:40,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:27:40,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 36 [2021-11-05 13:27:40,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129669836] [2021-11-05 13:27:40,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:27:40,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-05 13:27:40,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:27:40,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-05 13:27:40,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-11-05 13:27:40,420 INFO L87 Difference]: Start difference. First operand 372 states and 414 transitions. Second operand has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 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) [2021-11-05 13:27:45,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:27:45,135 INFO L93 Difference]: Finished difference Result 616 states and 694 transitions. [2021-11-05 13:27:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-05 13:27:45,136 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 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 87 [2021-11-05 13:27:45,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:27:45,137 INFO L225 Difference]: With dead ends: 616 [2021-11-05 13:27:45,137 INFO L226 Difference]: Without dead ends: 532 [2021-11-05 13:27:45,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 6105.36ms TimeCoverageRelationStatistics Valid=392, Invalid=2914, Unknown=0, NotChecked=0, Total=3306 [2021-11-05 13:27:45,139 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 370 mSDsluCounter, 2305 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 484.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 2435 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.62ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 574 IncrementalHoareTripleChecker+Unchecked, 568.30ms IncrementalHoareTripleChecker+Time [2021-11-05 13:27:45,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 2435 Invalid, 1598 Unknown, 0 Unchecked, 4.62ms Time], IncrementalHoareTripleChecker [37 Valid, 987 Invalid, 0 Unknown, 574 Unchecked, 568.30ms Time] [2021-11-05 13:27:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-05 13:27:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 377. [2021-11-05 13:27:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 375 states have (on average 1.1173333333333333) internal successors, (419), 376 states have internal predecessors, (419), 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) [2021-11-05 13:27:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 419 transitions. [2021-11-05 13:27:45,179 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 419 transitions. Word has length 87 [2021-11-05 13:27:45,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:27:45,180 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 419 transitions. [2021-11-05 13:27:45,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 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) [2021-11-05 13:27:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 419 transitions. [2021-11-05 13:27:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-05 13:27:45,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:27:45,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:27:45,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-05 13:27:45,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-05 13:27:45,392 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:27:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:27:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1393938504, now seen corresponding path program 1 times [2021-11-05 13:27:45,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:27:45,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425465961] [2021-11-05 13:27:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:27:45,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:27:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:27:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-05 13:27:45,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:27:45,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425465961] [2021-11-05 13:27:45,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425465961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:27:45,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:27:45,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-05 13:27:45,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726306404] [2021-11-05 13:27:45,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:27:45,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-05 13:27:45,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:27:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-05 13:27:45,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-05 13:27:45,470 INFO L87 Difference]: Start difference. First operand 377 states and 419 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2021-11-05 13:27:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:27:45,566 INFO L93 Difference]: Finished difference Result 425 states and 471 transitions. [2021-11-05 13:27:45,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-05 13:27:45,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) Word has length 93 [2021-11-05 13:27:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:27:45,567 INFO L225 Difference]: With dead ends: 425 [2021-11-05 13:27:45,568 INFO L226 Difference]: Without dead ends: 280 [2021-11-05 13:27:45,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.97ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-05 13:27:45,568 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 110 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.63ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.90ms IncrementalHoareTripleChecker+Time [2021-11-05 13:27:45,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 546 Invalid, 83 Unknown, 0 Unchecked, 0.63ms Time], IncrementalHoareTripleChecker [14 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 44.90ms Time] [2021-11-05 13:27:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-05 13:27:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 249. [2021-11-05 13:27:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 247 states have (on average 1.105263157894737) internal successors, (273), 248 states have internal predecessors, (273), 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) [2021-11-05 13:27:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 273 transitions. [2021-11-05 13:27:45,596 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 273 transitions. Word has length 93 [2021-11-05 13:27:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:27:45,597 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 273 transitions. [2021-11-05 13:27:45,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2021-11-05 13:27:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 273 transitions. [2021-11-05 13:27:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-05 13:27:45,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:27:45,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:27:45,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-05 13:27:45,598 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:27:45,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:27:45,599 INFO L85 PathProgramCache]: Analyzing trace with hash -86539151, now seen corresponding path program 2 times [2021-11-05 13:27:45,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:27:45,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265956820] [2021-11-05 13:27:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:27:45,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:27:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:27:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-05 13:27:46,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:27:46,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265956820] [2021-11-05 13:27:46,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265956820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:27:46,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932112921] [2021-11-05 13:27:46,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 13:27:46,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:27:46,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:27:46,590 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 13:27:46,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-05 13:27:46,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-05 13:27:46,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 13:27:46,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-05 13:27:46,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:27:46,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:27:46,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:27:46,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-05 13:27:46,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:27:46,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-05 13:27:47,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:27:47,050 INFO L354 Elim1Store]: treesize reduction 192, result has 14.3 percent of original size [2021-11-05 13:27:47,050 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 117 [2021-11-05 13:27:47,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:27:47,074 INFO L354 Elim1Store]: treesize reduction 164, result has 16.3 percent of original size [2021-11-05 13:27:47,075 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 140 treesize of output 101 [2021-11-05 13:27:50,980 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-11-05 13:27:50,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 104 [2021-11-05 13:27:50,995 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-11-05 13:27:50,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 47 [2021-11-05 13:27:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-05 13:27:51,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:28:04,505 WARN L230 SmtUtils]: Spent 11.09s on a formula simplification. DAG size of input: 859 DAG size of output: 376 [2021-11-05 13:28:04,506 INFO L354 Elim1Store]: treesize reduction 32142, result has 23.2 percent of original size [2021-11-05 13:28:04,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 1 disjoint index pairs (out of 136 index pairs), introduced 24 new quantified variables, introduced 156 case distinctions, treesize of input 35383545 treesize of output 31860483 [2021-11-05 13:30:20,723 WARN L230 SmtUtils]: Spent 2.27m on a formula simplification. DAG size of input: 2496 DAG size of output: 2497 [2021-11-05 13:30:28,291 WARN L230 SmtUtils]: Spent 7.55s on a formula simplification that was a NOOP. DAG size: 2443 Killed by 15