./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_pop_back_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 bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:01:07,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:01:07,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:01:07,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:01:07,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:01:07,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:01:07,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:01:07,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:01:07,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:01:07,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:01:07,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:01:07,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:01:07,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:01:07,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:01:07,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:01:07,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:01:07,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:01:07,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:01:07,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:01:07,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:01:07,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:01:07,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:01:07,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:01:07,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:01:07,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:01:07,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:01:07,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:01:07,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:01:07,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:01:07,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:01:07,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:01:07,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:01:07,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:01:07,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:01:07,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:01:07,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:01:07,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:01:07,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:01:07,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:01:07,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:01:07,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:01:07,902 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:01:07,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:01:07,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:01:07,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:01:07,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:01:07,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:01:07,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:01:07,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:01:07,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:01:07,955 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:01:07,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:01:07,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:01:07,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:01:07,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:01:07,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:01:07,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:01:07,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:01:07,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:01:07,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:01:07,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:01:07,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:01:07,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:01:07,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:01:07,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:01:07,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:01:07,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:01:07,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:01:07,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:01:07,958 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:01:07,959 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:01:07,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:01:07,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:01:07,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 [2021-12-22 14:01:08,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:01:08,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:01:08,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:01:08,354 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:01:08,354 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:01:08,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2021-12-22 14:01:08,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522bbf66c/7bfa5e99bcce46f6bba903ca2c7cf87d/FLAGa2b7300c7 [2021-12-22 14:01:08,973 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:01:08,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2021-12-22 14:01:09,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522bbf66c/7bfa5e99bcce46f6bba903ca2c7cf87d/FLAGa2b7300c7 [2021-12-22 14:01:09,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522bbf66c/7bfa5e99bcce46f6bba903ca2c7cf87d [2021-12-22 14:01:09,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:01:09,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:01:09,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:01:09,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:01:09,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:01:09,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:01:09" (1/1) ... [2021-12-22 14:01:09,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13714a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:09, skipping insertion in model container [2021-12-22 14:01:09,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:01:09" (1/1) ... [2021-12-22 14:01:09,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:01:09,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:01:09,648 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2021-12-22 14:01:09,653 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2021-12-22 14:01:10,163 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,171 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,182 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,183 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,184 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,185 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,186 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,186 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,187 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,187 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,363 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 14:01:10,365 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 14:01:10,366 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 14:01:10,366 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 14:01:10,368 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 14:01:10,368 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 14:01:10,369 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 14:01:10,369 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 14:01:10,370 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 14:01:10,378 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 14:01:10,481 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 14:01:10,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:01:10,505 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:01:10,514 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2021-12-22 14:01:10,514 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2021-12-22 14:01:10,537 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,543 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,544 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,544 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,560 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,564 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,565 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,565 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,565 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,566 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,566 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,567 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,567 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:10,595 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 14:01:10,596 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 14:01:10,597 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 14:01:10,598 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 14:01:10,601 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 14:01:10,603 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 14:01:10,604 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 14:01:10,604 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 14:01:10,605 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 14:01:10,605 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 14:01:10,628 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 14:01:10,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:01:10,797 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:01:10,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:10 WrapperNode [2021-12-22 14:01:10,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:01:10,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:01:10,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:01:10,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:01:10,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:10" (1/1) ... [2021-12-22 14:01:10,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:10" (1/1) ... [2021-12-22 14:01:10,881 INFO L137 Inliner]: procedures = 679, calls = 1046, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 225 [2021-12-22 14:01:10,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:01:10,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:01:10,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:01:10,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:01:10,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:10" (1/1) ... [2021-12-22 14:01:10,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:10" (1/1) ... [2021-12-22 14:01:10,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:10" (1/1) ... [2021-12-22 14:01:10,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:10" (1/1) ... [2021-12-22 14:01:10,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:10" (1/1) ... [2021-12-22 14:01:10,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:10" (1/1) ... [2021-12-22 14:01:10,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:10" (1/1) ... [2021-12-22 14:01:10,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:01:10,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:01:10,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:01:10,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:01:10,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:10" (1/1) ... [2021-12-22 14:01:10,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:01:10,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:10,980 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 14:01:10,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 14:01:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-22 14:01:11,006 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-22 14:01:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-12-22 14:01:11,007 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-12-22 14:01:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:01:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:01:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 14:01:11,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 14:01:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-22 14:01:11,008 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-22 14:01:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:01:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-22 14:01:11,009 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-22 14:01:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:01:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:01:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:01:11,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:01:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-12-22 14:01:11,010 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-12-22 14:01:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 14:01:11,010 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 14:01:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 14:01:11,010 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 14:01:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:01:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:01:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:01:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-22 14:01:11,012 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-22 14:01:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-12-22 14:01:11,012 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-12-22 14:01:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:01:11,257 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:01:11,259 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:01:11,537 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:01:11,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:01:11,542 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-22 14:01:11,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:01:11 BoogieIcfgContainer [2021-12-22 14:01:11,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:01:11,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:01:11,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:01:11,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:01:11,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:01:09" (1/3) ... [2021-12-22 14:01:11,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719f9916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:01:11, skipping insertion in model container [2021-12-22 14:01:11,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:10" (2/3) ... [2021-12-22 14:01:11,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719f9916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:01:11, skipping insertion in model container [2021-12-22 14:01:11,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:01:11" (3/3) ... [2021-12-22 14:01:11,550 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_back_harness.i [2021-12-22 14:01:11,555 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:01:11,555 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:01:11,587 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:01:11,591 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 14:01:11,591 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:01:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-22 14:01:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-22 14:01:11,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:11,630 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:11,630 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1579343520, now seen corresponding path program 1 times [2021-12-22 14:01:11,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:11,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394211866] [2021-12-22 14:01:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:11,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:11,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:01:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:11,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:01:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:11,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:01:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:11,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:01:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:01:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 14:01:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 14:01:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 14:01:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 14:01:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 14:01:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 14:01:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-22 14:01:12,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:12,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394211866] [2021-12-22 14:01:12,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394211866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407097949] [2021-12-22 14:01:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:12,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:12,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:12,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:01:12,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 14:01:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:12,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:01:12,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 14:01:12,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:01:12,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407097949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:01:12,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:01:12,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-22 14:01:12,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416957357] [2021-12-22 14:01:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:01:12,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:01:12,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:12,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:01:12,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:01:12,642 INFO L87 Difference]: Start difference. First operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-22 14:01:12,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:12,699 INFO L93 Difference]: Finished difference Result 274 states and 414 transitions. [2021-12-22 14:01:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:01:12,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2021-12-22 14:01:12,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:12,708 INFO L225 Difference]: With dead ends: 274 [2021-12-22 14:01:12,708 INFO L226 Difference]: Without dead ends: 140 [2021-12-22 14:01:12,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:01:12,715 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 12 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:12,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 536 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:01:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-22 14:01:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-12-22 14:01:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 86 states have (on average 1.244186046511628) internal successors, (107), 87 states have internal predecessors, (107), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-22 14:01:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 180 transitions. [2021-12-22 14:01:12,753 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 180 transitions. Word has length 116 [2021-12-22 14:01:12,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:12,754 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 180 transitions. [2021-12-22 14:01:12,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-22 14:01:12,754 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 180 transitions. [2021-12-22 14:01:12,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-22 14:01:12,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:12,756 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:12,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 14:01:12,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-22 14:01:12,991 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:12,992 INFO L85 PathProgramCache]: Analyzing trace with hash -183799078, now seen corresponding path program 1 times [2021-12-22 14:01:12,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:12,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504861967] [2021-12-22 14:01:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:12,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:01:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:01:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:01:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:01:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:01:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 14:01:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 14:01:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 14:01:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 14:01:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 14:01:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 14:01:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-12-22 14:01:13,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:13,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504861967] [2021-12-22 14:01:13,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504861967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:13,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994538136] [2021-12-22 14:01:13,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:13,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:13,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:13,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:01:13,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 14:01:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:01:13,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-22 14:01:13,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:01:13,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994538136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:01:13,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:01:13,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-22 14:01:13,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992755200] [2021-12-22 14:01:13,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:01:13,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:01:13,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:13,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:01:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:01:13,539 INFO L87 Difference]: Start difference. First operand 134 states and 180 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-22 14:01:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:13,571 INFO L93 Difference]: Finished difference Result 252 states and 345 transitions. [2021-12-22 14:01:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:01:13,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2021-12-22 14:01:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:13,573 INFO L225 Difference]: With dead ends: 252 [2021-12-22 14:01:13,573 INFO L226 Difference]: Without dead ends: 138 [2021-12-22 14:01:13,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:01:13,575 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 3 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:13,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 520 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:01:13,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-22 14:01:13,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-12-22 14:01:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 90 states have internal predecessors, (110), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-22 14:01:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2021-12-22 14:01:13,586 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 116 [2021-12-22 14:01:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:13,587 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2021-12-22 14:01:13,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-22 14:01:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2021-12-22 14:01:13,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-22 14:01:13,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:13,589 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:13,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 14:01:13,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-22 14:01:13,809 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:13,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash -543175276, now seen corresponding path program 1 times [2021-12-22 14:01:13,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:13,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749627298] [2021-12-22 14:01:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:13,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:01:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:01:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:01:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:01:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:13,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:01:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:14,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 14:01:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:14,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 14:01:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:14,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 14:01:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:14,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 14:01:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:14,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:14,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 14:01:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:14,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 14:01:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-22 14:01:14,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:14,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749627298] [2021-12-22 14:01:14,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749627298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:14,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239985392] [2021-12-22 14:01:14,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:14,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:14,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:14,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:01:14,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 14:01:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:14,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-22 14:01:14,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:14,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:01:14,473 INFO L387 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 18 treesize of output 19 [2021-12-22 14:01:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-22 14:01:15,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:01:15,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239985392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:01:15,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:01:15,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2021-12-22 14:01:15,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123515911] [2021-12-22 14:01:15,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:01:15,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 14:01:15,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:15,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 14:01:15,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-12-22 14:01:15,033 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-22 14:01:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:15,149 INFO L93 Difference]: Finished difference Result 327 states and 440 transitions. [2021-12-22 14:01:15,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 14:01:15,149 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 116 [2021-12-22 14:01:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:15,152 INFO L225 Difference]: With dead ends: 327 [2021-12-22 14:01:15,152 INFO L226 Difference]: Without dead ends: 203 [2021-12-22 14:01:15,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-12-22 14:01:15,154 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 63 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:15,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1109 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2021-12-22 14:01:15,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-22 14:01:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 169. [2021-12-22 14:01:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 114 states have internal predecessors, (136), 43 states have call successors, (43), 13 states have call predecessors, (43), 13 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2021-12-22 14:01:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 222 transitions. [2021-12-22 14:01:15,174 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 222 transitions. Word has length 116 [2021-12-22 14:01:15,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:15,174 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 222 transitions. [2021-12-22 14:01:15,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-22 14:01:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 222 transitions. [2021-12-22 14:01:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-22 14:01:15,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:15,179 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 14:01:15,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 14:01:15,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:15,398 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:15,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1369878566, now seen corresponding path program 1 times [2021-12-22 14:01:15,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:15,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158391088] [2021-12-22 14:01:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:15,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:01:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:01:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:01:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:01:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:01:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 14:01:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 14:01:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 14:01:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 14:01:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 14:01:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 14:01:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-22 14:01:15,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:15,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158391088] [2021-12-22 14:01:15,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158391088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:15,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329951558] [2021-12-22 14:01:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:15,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:15,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:15,708 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:01:15,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 14:01:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:15,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-22 14:01:15,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:15,944 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 14:01:15,945 INFO L387 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 9 treesize of output 15 [2021-12-22 14:01:15,957 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 14:01:15,957 INFO L387 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 9 treesize of output 15 [2021-12-22 14:01:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 105 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 14:01:17,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:01:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-22 14:01:17,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329951558] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:01:17,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 14:01:17,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 12] total 28 [2021-12-22 14:01:17,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260319752] [2021-12-22 14:01:17,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 14:01:17,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-22 14:01:17,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:17,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-22 14:01:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-12-22 14:01:17,517 INFO L87 Difference]: Start difference. First operand 169 states and 222 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 26 states have internal predecessors, (104), 10 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-12-22 14:01:18,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:18,997 INFO L93 Difference]: Finished difference Result 416 states and 579 transitions. [2021-12-22 14:01:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 14:01:18,997 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 26 states have internal predecessors, (104), 10 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) Word has length 116 [2021-12-22 14:01:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:18,999 INFO L225 Difference]: With dead ends: 416 [2021-12-22 14:01:19,000 INFO L226 Difference]: Without dead ends: 295 [2021-12-22 14:01:19,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 244 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=327, Invalid=1743, Unknown=0, NotChecked=0, Total=2070 [2021-12-22 14:01:19,002 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 315 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:19,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 2597 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1112 Invalid, 0 Unknown, 337 Unchecked, 0.8s Time] [2021-12-22 14:01:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-22 14:01:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 218. [2021-12-22 14:01:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 145 states have (on average 1.186206896551724) internal successors, (172), 149 states have internal predecessors, (172), 54 states have call successors, (54), 16 states have call predecessors, (54), 18 states have return successors, (67), 52 states have call predecessors, (67), 53 states have call successors, (67) [2021-12-22 14:01:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 293 transitions. [2021-12-22 14:01:19,024 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 293 transitions. Word has length 116 [2021-12-22 14:01:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:19,024 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 293 transitions. [2021-12-22 14:01:19,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 26 states have internal predecessors, (104), 10 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-12-22 14:01:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 293 transitions. [2021-12-22 14:01:19,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-22 14:01:19,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:19,026 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:19,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 14:01:19,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:19,247 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:19,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1275142702, now seen corresponding path program 1 times [2021-12-22 14:01:19,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:19,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627163151] [2021-12-22 14:01:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:19,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:01:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:01:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:01:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:01:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:01:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 14:01:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 14:01:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 14:01:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 14:01:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 14:01:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 14:01:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-22 14:01:19,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:19,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627163151] [2021-12-22 14:01:19,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627163151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:19,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198088855] [2021-12-22 14:01:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:19,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:19,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:19,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:01:19,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 14:01:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 14:01:19,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-22 14:01:19,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:01:19,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198088855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:01:19,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:01:19,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-12-22 14:01:19,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438188173] [2021-12-22 14:01:19,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:01:19,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:01:19,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:19,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:01:19,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-22 14:01:19,920 INFO L87 Difference]: Start difference. First operand 218 states and 293 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-22 14:01:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:20,049 INFO L93 Difference]: Finished difference Result 403 states and 553 transitions. [2021-12-22 14:01:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:01:20,050 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), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 116 [2021-12-22 14:01:20,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:20,053 INFO L225 Difference]: With dead ends: 403 [2021-12-22 14:01:20,053 INFO L226 Difference]: Without dead ends: 226 [2021-12-22 14:01:20,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-22 14:01:20,056 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 227 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:20,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 604 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 14:01:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-22 14:01:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-12-22 14:01:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 152 states have (on average 1.2105263157894737) internal successors, (184), 156 states have internal predecessors, (184), 55 states have call successors, (55), 16 states have call predecessors, (55), 18 states have return successors, (69), 53 states have call predecessors, (69), 54 states have call successors, (69) [2021-12-22 14:01:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 308 transitions. [2021-12-22 14:01:20,084 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 308 transitions. Word has length 116 [2021-12-22 14:01:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:20,085 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 308 transitions. [2021-12-22 14:01:20,085 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), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-22 14:01:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 308 transitions. [2021-12-22 14:01:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-22 14:01:20,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:20,088 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:20,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 14:01:20,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:20,323 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:20,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1492302642, now seen corresponding path program 1 times [2021-12-22 14:01:20,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:20,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861306081] [2021-12-22 14:01:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:20,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:01:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:01:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:01:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 14:01:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 14:01:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 14:01:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 14:01:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 14:01:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 14:01:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-22 14:01:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 14:01:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 14:01:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 14:01:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-22 14:01:20,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:20,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861306081] [2021-12-22 14:01:20,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861306081] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:20,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787271074] [2021-12-22 14:01:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:20,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:20,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:20,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:01:20,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 14:01:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:20,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-22 14:01:20,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:20,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 14:01:20,890 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 14:01:20,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 14:01:20,898 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-22 14:01:20,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 14:01:20,954 INFO L353 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-22 14:01:20,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 68 [2021-12-22 14:01:20,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:01:20,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2021-12-22 14:01:20,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-22 14:01:21,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-22 14:01:21,012 INFO L387 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 13 treesize of output 9 [2021-12-22 14:01:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 112 proven. 17 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-22 14:01:28,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:01:29,231 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_490 (Array Int Int)) (v_ArrVal_492 (Array Int Int)) (v_ArrVal_491 Int)) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_490) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_492) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_491)) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|) 0))) is different from false [2021-12-22 14:01:29,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 14:01:29,251 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-22 14:01:29,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 14:01:29,265 INFO L387 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 316 treesize of output 292 [2021-12-22 14:01:29,273 INFO L387 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 306 treesize of output 298 [2021-12-22 14:01:29,282 INFO L387 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 298 treesize of output 294 [2021-12-22 14:01:29,447 INFO L387 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 24 treesize of output 22 [2021-12-22 14:01:29,459 INFO L387 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 6 treesize of output 4 [2021-12-22 14:01:29,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 14:01:29,485 INFO L387 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 70 treesize of output 66 [2021-12-22 14:01:29,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787271074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:29,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 14:01:29,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2021-12-22 14:01:29,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984476788] [2021-12-22 14:01:29,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 14:01:29,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 14:01:29,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 14:01:29,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=525, Unknown=1, NotChecked=46, Total=650 [2021-12-22 14:01:29,670 INFO L87 Difference]: Start difference. First operand 226 states and 308 transitions. Second operand has 17 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2021-12-22 14:01:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:36,234 INFO L93 Difference]: Finished difference Result 496 states and 699 transitions. [2021-12-22 14:01:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-22 14:01:36,234 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 118 [2021-12-22 14:01:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:36,236 INFO L225 Difference]: With dead ends: 496 [2021-12-22 14:01:36,236 INFO L226 Difference]: Without dead ends: 290 [2021-12-22 14:01:36,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 226 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=4, NotChecked=66, Total=1260 [2021-12-22 14:01:36,237 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 63 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:36,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 2134 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 368 Invalid, 0 Unknown, 317 Unchecked, 0.3s Time] [2021-12-22 14:01:36,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-22 14:01:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 205. [2021-12-22 14:01:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 144 states have internal predecessors, (172), 45 states have call successors, (45), 17 states have call predecessors, (45), 18 states have return successors, (52), 43 states have call predecessors, (52), 44 states have call successors, (52) [2021-12-22 14:01:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 269 transitions. [2021-12-22 14:01:36,255 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 269 transitions. Word has length 118 [2021-12-22 14:01:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:36,256 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 269 transitions. [2021-12-22 14:01:36,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2021-12-22 14:01:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 269 transitions. [2021-12-22 14:01:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-22 14:01:36,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:36,257 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 14:01:36,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-22 14:01:36,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:36,472 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1991074974, now seen corresponding path program 1 times [2021-12-22 14:01:36,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:36,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090641935] [2021-12-22 14:01:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:36,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:01:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:01:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:01:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:01:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:01:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 14:01:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 14:01:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-22 14:01:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 14:01:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 14:01:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 14:01:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-22 14:01:36,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090641935] [2021-12-22 14:01:36,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090641935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821268173] [2021-12-22 14:01:36,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:36,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:36,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:36,676 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:01:36,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 14:01:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:36,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 14:01:36,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-22 14:01:37,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:01:37,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821268173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:01:37,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:01:37,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-22 14:01:37,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521688302] [2021-12-22 14:01:37,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:01:37,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 14:01:37,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:37,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 14:01:37,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:01:37,022 INFO L87 Difference]: Start difference. First operand 205 states and 269 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-22 14:01:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:37,261 INFO L93 Difference]: Finished difference Result 366 states and 489 transitions. [2021-12-22 14:01:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 14:01:37,262 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 118 [2021-12-22 14:01:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:37,264 INFO L225 Difference]: With dead ends: 366 [2021-12-22 14:01:37,264 INFO L226 Difference]: Without dead ends: 213 [2021-12-22 14:01:37,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-22 14:01:37,266 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 215 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:37,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 755 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 14:01:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-22 14:01:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2021-12-22 14:01:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 144 states have internal predecessors, (172), 45 states have call successors, (45), 17 states have call predecessors, (45), 18 states have return successors, (52), 43 states have call predecessors, (52), 44 states have call successors, (52) [2021-12-22 14:01:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 269 transitions. [2021-12-22 14:01:37,282 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 269 transitions. Word has length 118 [2021-12-22 14:01:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:37,283 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 269 transitions. [2021-12-22 14:01:37,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-22 14:01:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 269 transitions. [2021-12-22 14:01:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-22 14:01:37,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:37,286 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 14:01:37,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 14:01:37,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:37,503 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:37,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash -267467697, now seen corresponding path program 1 times [2021-12-22 14:01:37,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:37,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701618721] [2021-12-22 14:01:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:37,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:01:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:01:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:01:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:01:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:01:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 14:01:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 14:01:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:01:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-22 14:01:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 14:01:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-22 14:01:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-22 14:01:37,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:37,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701618721] [2021-12-22 14:01:37,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701618721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:37,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628664967] [2021-12-22 14:01:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:37,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:37,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:37,690 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:01:37,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 14:01:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 14:01:37,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-22 14:01:38,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:01:38,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628664967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:01:38,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:01:38,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-12-22 14:01:38,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028745668] [2021-12-22 14:01:38,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:01:38,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 14:01:38,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:38,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 14:01:38,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-22 14:01:38,083 INFO L87 Difference]: Start difference. First operand 205 states and 269 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-22 14:01:38,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:38,330 INFO L93 Difference]: Finished difference Result 387 states and 525 transitions. [2021-12-22 14:01:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 14:01:38,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 120 [2021-12-22 14:01:38,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:38,332 INFO L225 Difference]: With dead ends: 387 [2021-12-22 14:01:38,332 INFO L226 Difference]: Without dead ends: 234 [2021-12-22 14:01:38,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-12-22 14:01:38,333 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 252 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:38,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 880 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 14:01:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-22 14:01:38,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 206. [2021-12-22 14:01:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 142 states have (on average 1.2253521126760563) internal successors, (174), 145 states have internal predecessors, (174), 45 states have call successors, (45), 17 states have call predecessors, (45), 18 states have return successors, (52), 43 states have call predecessors, (52), 44 states have call successors, (52) [2021-12-22 14:01:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 271 transitions. [2021-12-22 14:01:38,346 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 271 transitions. Word has length 120 [2021-12-22 14:01:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:38,346 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 271 transitions. [2021-12-22 14:01:38,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-22 14:01:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 271 transitions. [2021-12-22 14:01:38,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-22 14:01:38,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:38,348 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 14:01:38,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 14:01:38,567 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,SelfDestructingSolverStorable7 [2021-12-22 14:01:38,567 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:38,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1914003673, now seen corresponding path program 1 times [2021-12-22 14:01:38,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:38,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232857028] [2021-12-22 14:01:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:38,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:01:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:01:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:01:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:01:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:01:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 14:01:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 14:01:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 14:01:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 14:01:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 14:01:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 14:01:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-22 14:01:38,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:38,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232857028] [2021-12-22 14:01:38,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232857028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:38,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090065996] [2021-12-22 14:01:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:38,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:38,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:38,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:01:38,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 14:01:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:38,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 14:01:38,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-22 14:01:39,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:01:39,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090065996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:01:39,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:01:39,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 14:01:39,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058943585] [2021-12-22 14:01:39,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:01:39,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:01:39,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:39,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:01:39,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:01:39,023 INFO L87 Difference]: Start difference. First operand 206 states and 271 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-22 14:01:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:39,038 INFO L93 Difference]: Finished difference Result 374 states and 513 transitions. [2021-12-22 14:01:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:01:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 121 [2021-12-22 14:01:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:39,040 INFO L225 Difference]: With dead ends: 374 [2021-12-22 14:01:39,040 INFO L226 Difference]: Without dead ends: 220 [2021-12-22 14:01:39,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:01:39,041 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 6 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:39,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 355 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:01:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-22 14:01:39,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 209. [2021-12-22 14:01:39,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 148 states have internal predecessors, (178), 45 states have call successors, (45), 17 states have call predecessors, (45), 18 states have return successors, (52), 43 states have call predecessors, (52), 44 states have call successors, (52) [2021-12-22 14:01:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 275 transitions. [2021-12-22 14:01:39,049 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 275 transitions. Word has length 121 [2021-12-22 14:01:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:39,049 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 275 transitions. [2021-12-22 14:01:39,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-22 14:01:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 275 transitions. [2021-12-22 14:01:39,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-22 14:01:39,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:39,050 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 14:01:39,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 14:01:39,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:39,268 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:39,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2103576065, now seen corresponding path program 1 times [2021-12-22 14:01:39,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:39,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725254415] [2021-12-22 14:01:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:39,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:01:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:01:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:01:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 14:01:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 14:01:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 14:01:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 14:01:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:01:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 14:01:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 14:01:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 14:01:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 14:01:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 14:01:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 14:01:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-22 14:01:39,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:39,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725254415] [2021-12-22 14:01:39,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725254415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:39,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673124616] [2021-12-22 14:01:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:39,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:39,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:39,500 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:01:39,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 14:01:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:39,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-22 14:01:39,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-22 14:01:40,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:01:40,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673124616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:01:40,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:01:40,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 14 [2021-12-22 14:01:40,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122103436] [2021-12-22 14:01:40,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:01:40,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 14:01:40,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:40,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 14:01:40,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-22 14:01:40,004 INFO L87 Difference]: Start difference. First operand 209 states and 275 transitions. Second operand has 12 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-22 14:01:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:40,406 INFO L93 Difference]: Finished difference Result 374 states and 501 transitions. [2021-12-22 14:01:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 14:01:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 133 [2021-12-22 14:01:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:40,407 INFO L225 Difference]: With dead ends: 374 [2021-12-22 14:01:40,407 INFO L226 Difference]: Without dead ends: 217 [2021-12-22 14:01:40,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-12-22 14:01:40,408 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 178 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:40,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1338 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 14:01:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-22 14:01:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 210. [2021-12-22 14:01:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 146 states have (on average 1.226027397260274) internal successors, (179), 149 states have internal predecessors, (179), 45 states have call successors, (45), 17 states have call predecessors, (45), 18 states have return successors, (52), 43 states have call predecessors, (52), 44 states have call successors, (52) [2021-12-22 14:01:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 276 transitions. [2021-12-22 14:01:40,420 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 276 transitions. Word has length 133 [2021-12-22 14:01:40,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:40,420 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 276 transitions. [2021-12-22 14:01:40,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-22 14:01:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 276 transitions. [2021-12-22 14:01:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-22 14:01:40,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:40,422 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 14:01:40,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 14:01:40,622 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,SelfDestructingSolverStorable9 [2021-12-22 14:01:40,622 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:40,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1814934808, now seen corresponding path program 1 times [2021-12-22 14:01:40,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:40,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625710835] [2021-12-22 14:01:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:40,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:01:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:01:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:01:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:01:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:01:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:01:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:01:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 14:01:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 14:01:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 14:01:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-22 14:01:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 14:01:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-22 14:01:40,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:40,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625710835] [2021-12-22 14:01:40,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625710835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:40,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693677088] [2021-12-22 14:01:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:40,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:40,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:40,809 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:01:40,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 14:01:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:40,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-22 14:01:40,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:41,033 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 14:01:41,034 INFO L387 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 9 treesize of output 15 [2021-12-22 14:01:41,044 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 14:01:41,044 INFO L387 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 9 treesize of output 15 [2021-12-22 14:01:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 103 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 14:01:41,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:01:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-22 14:01:42,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693677088] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:01:42,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 14:01:42,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 13] total 33 [2021-12-22 14:01:42,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668896762] [2021-12-22 14:01:42,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 14:01:42,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 14:01:42,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:42,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 14:01:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 14:01:42,887 INFO L87 Difference]: Start difference. First operand 210 states and 276 transitions. Second operand has 33 states, 33 states have (on average 4.121212121212121) internal successors, (136), 31 states have internal predecessors, (136), 13 states have call successors, (38), 3 states have call predecessors, (38), 6 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-22 14:01:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:43,788 INFO L93 Difference]: Finished difference Result 414 states and 578 transitions. [2021-12-22 14:01:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 14:01:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.121212121212121) internal successors, (136), 31 states have internal predecessors, (136), 13 states have call successors, (38), 3 states have call predecessors, (38), 6 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) Word has length 131 [2021-12-22 14:01:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:43,795 INFO L225 Difference]: With dead ends: 414 [2021-12-22 14:01:43,796 INFO L226 Difference]: Without dead ends: 256 [2021-12-22 14:01:43,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 268 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2021-12-22 14:01:43,804 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 304 mSDsluCounter, 2739 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:43,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 2906 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 735 Invalid, 0 Unknown, 106 Unchecked, 0.5s Time] [2021-12-22 14:01:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-22 14:01:43,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 216. [2021-12-22 14:01:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 150 states have (on average 1.22) internal successors, (183), 153 states have internal predecessors, (183), 47 states have call successors, (47), 17 states have call predecessors, (47), 18 states have return successors, (54), 45 states have call predecessors, (54), 46 states have call successors, (54) [2021-12-22 14:01:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 284 transitions. [2021-12-22 14:01:43,842 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 284 transitions. Word has length 131 [2021-12-22 14:01:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:43,842 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 284 transitions. [2021-12-22 14:01:43,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.121212121212121) internal successors, (136), 31 states have internal predecessors, (136), 13 states have call successors, (38), 3 states have call predecessors, (38), 6 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-22 14:01:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 284 transitions. [2021-12-22 14:01:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 14:01:43,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:43,844 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:43,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-22 14:01:44,045 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,SelfDestructingSolverStorable10 [2021-12-22 14:01:44,045 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:44,045 INFO L85 PathProgramCache]: Analyzing trace with hash 468492572, now seen corresponding path program 1 times [2021-12-22 14:01:44,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:44,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934209272] [2021-12-22 14:01:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:44,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:01:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:01:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:01:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 14:01:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 14:01:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 14:01:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 14:01:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:01:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-22 14:01:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 14:01:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 14:01:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-22 14:01:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:01:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 14:01:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 14:01:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-12-22 14:01:44,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:44,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934209272] [2021-12-22 14:01:44,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934209272] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:44,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461881029] [2021-12-22 14:01:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:44,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:44,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:44,307 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:01:44,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 14:01:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-22 14:01:44,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:44,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 14:01:44,676 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-22 14:01:44,686 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 14:01:44,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 14:01:44,690 INFO L387 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 5 treesize of output 3 [2021-12-22 14:01:44,703 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 14:01:44,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 14:01:44,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-22 14:01:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:01:44,768 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 14:01:44,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2021-12-22 14:01:44,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:01:44,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:01:44,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-12-22 14:01:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 112 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-22 14:01:46,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:02,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 14:02:02,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2021-12-22 14:02:02,675 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_13| Int) (v_arrayElimArr_7 (Array Int Int)) (v_ArrVal_1120 Int)) (or (not (= (select v_arrayElimArr_7 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_13|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))) (not (= (+ 16 |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|) (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| v_arrayElimArr_7))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1120))) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|))) (not (< |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| |c_#StackHeapBarrier|)))) is different from false [2021-12-22 14:02:02,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 14:02:02,734 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 47 [2021-12-22 14:02:02,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 14:02:02,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2021-12-22 14:02:02,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 14:02:02,768 INFO L387 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 1691 treesize of output 1661 [2021-12-22 14:02:02,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 14:02:02,790 INFO L387 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 1757 treesize of output 1727 [2021-12-22 14:02:02,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 14:02:02,820 INFO L387 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 1963 treesize of output 1897 [2021-12-22 14:02:03,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-22 14:02:03,857 INFO L387 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 28 treesize of output 26 [2021-12-22 14:02:03,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 14:02:03,944 INFO L387 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 82 treesize of output 84 [2021-12-22 14:02:04,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461881029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:02:04,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 14:02:04,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15] total 19 [2021-12-22 14:02:04,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34167882] [2021-12-22 14:02:04,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 14:02:04,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 14:02:04,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:04,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 14:02:04,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=718, Unknown=7, NotChecked=54, Total=870 [2021-12-22 14:02:04,221 INFO L87 Difference]: Start difference. First operand 216 states and 284 transitions. Second operand has 19 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2021-12-22 14:02:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:06,898 INFO L93 Difference]: Finished difference Result 493 states and 668 transitions. [2021-12-22 14:02:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-22 14:02:06,900 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) Word has length 136 [2021-12-22 14:02:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:06,904 INFO L225 Difference]: With dead ends: 493 [2021-12-22 14:02:06,904 INFO L226 Difference]: Without dead ends: 305 [2021-12-22 14:02:06,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 261 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=159, Invalid=1319, Unknown=8, NotChecked=74, Total=1560 [2021-12-22 14:02:06,905 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 59 mSDsluCounter, 2825 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 647 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:06,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 3041 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 320 Invalid, 0 Unknown, 647 Unchecked, 0.3s Time] [2021-12-22 14:02:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-22 14:02:06,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 247. [2021-12-22 14:02:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 175 states have (on average 1.2) internal successors, (210), 179 states have internal predecessors, (210), 49 states have call successors, (49), 20 states have call predecessors, (49), 22 states have return successors, (60), 47 states have call predecessors, (60), 48 states have call successors, (60) [2021-12-22 14:02:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 319 transitions. [2021-12-22 14:02:06,918 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 319 transitions. Word has length 136 [2021-12-22 14:02:06,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:06,918 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 319 transitions. [2021-12-22 14:02:06,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2021-12-22 14:02:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 319 transitions. [2021-12-22 14:02:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-22 14:02:06,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:06,919 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 14:02:06,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:07,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 14:02:07,139 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:07,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:07,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1609999324, now seen corresponding path program 1 times [2021-12-22 14:02:07,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:07,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734632615] [2021-12-22 14:02:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:07,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:02:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:02:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:02:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:02:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:02:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:02:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:02:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:02:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 14:02:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:02:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 14:02:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 14:02:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 14:02:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-22 14:02:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-22 14:02:07,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:07,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734632615] [2021-12-22 14:02:07,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734632615] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:02:07,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501668699] [2021-12-22 14:02:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:07,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:07,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:07,340 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:07,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 14:02:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:07,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 14:02:07,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-22 14:02:07,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:07,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501668699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:07,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:02:07,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-12-22 14:02:07,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584313762] [2021-12-22 14:02:07,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:07,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 14:02:07,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:07,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 14:02:07,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-22 14:02:07,763 INFO L87 Difference]: Start difference. First operand 247 states and 319 transitions. Second operand has 9 states, 8 states have (on average 9.25) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-22 14:02:08,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:08,025 INFO L93 Difference]: Finished difference Result 415 states and 542 transitions. [2021-12-22 14:02:08,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:02:08,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 134 [2021-12-22 14:02:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:08,026 INFO L225 Difference]: With dead ends: 415 [2021-12-22 14:02:08,026 INFO L226 Difference]: Without dead ends: 247 [2021-12-22 14:02:08,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-22 14:02:08,027 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 231 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:08,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 875 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 14:02:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-22 14:02:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-12-22 14:02:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 175 states have (on average 1.1828571428571428) internal successors, (207), 179 states have internal predecessors, (207), 49 states have call successors, (49), 20 states have call predecessors, (49), 22 states have return successors, (60), 47 states have call predecessors, (60), 48 states have call successors, (60) [2021-12-22 14:02:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 316 transitions. [2021-12-22 14:02:08,040 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 316 transitions. Word has length 134 [2021-12-22 14:02:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:08,041 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 316 transitions. [2021-12-22 14:02:08,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-22 14:02:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 316 transitions. [2021-12-22 14:02:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-22 14:02:08,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:08,042 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:08,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:08,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 14:02:08,260 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1124373789, now seen corresponding path program 1 times [2021-12-22 14:02:08,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:08,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179106546] [2021-12-22 14:02:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:08,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:02:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:02:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:02:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:02:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:02:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:02:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:02:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:02:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 14:02:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:02:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:02:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-22 14:02:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-22 14:02:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 14:02:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-22 14:02:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-22 14:02:08,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:08,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179106546] [2021-12-22 14:02:08,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179106546] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:02:08,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616445941] [2021-12-22 14:02:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:08,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:08,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:08,450 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:08,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 14:02:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:08,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-22 14:02:08,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 121 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-22 14:02:08,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-22 14:02:09,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616445941] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:02:09,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 14:02:09,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 7] total 18 [2021-12-22 14:02:09,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180479028] [2021-12-22 14:02:09,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 14:02:09,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 14:02:09,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:09,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 14:02:09,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-22 14:02:09,255 INFO L87 Difference]: Start difference. First operand 247 states and 316 transitions. Second operand has 18 states, 15 states have (on average 5.533333333333333) internal successors, (83), 14 states have internal predecessors, (83), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-12-22 14:02:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:09,600 INFO L93 Difference]: Finished difference Result 427 states and 556 transitions. [2021-12-22 14:02:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 14:02:09,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 5.533333333333333) internal successors, (83), 14 states have internal predecessors, (83), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 145 [2021-12-22 14:02:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:09,603 INFO L225 Difference]: With dead ends: 427 [2021-12-22 14:02:09,603 INFO L226 Difference]: Without dead ends: 262 [2021-12-22 14:02:09,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-12-22 14:02:09,604 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 12 mSDsluCounter, 2497 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2668 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:09,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2668 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 14:02:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-22 14:02:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 246. [2021-12-22 14:02:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 175 states have (on average 1.1828571428571428) internal successors, (207), 178 states have internal predecessors, (207), 49 states have call successors, (49), 20 states have call predecessors, (49), 21 states have return successors, (56), 47 states have call predecessors, (56), 48 states have call successors, (56) [2021-12-22 14:02:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 312 transitions. [2021-12-22 14:02:09,616 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 312 transitions. Word has length 145 [2021-12-22 14:02:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:09,616 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 312 transitions. [2021-12-22 14:02:09,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 5.533333333333333) internal successors, (83), 14 states have internal predecessors, (83), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-12-22 14:02:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 312 transitions. [2021-12-22 14:02:09,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-22 14:02:09,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:09,618 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:09,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:09,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:09,836 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:09,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:09,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1710038106, now seen corresponding path program 1 times [2021-12-22 14:02:09,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:09,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238155921] [2021-12-22 14:02:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:09,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:02:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:02:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:02:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:02:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:02:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:02:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:02:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:02:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 14:02:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:02:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:02:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-22 14:02:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 14:02:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-22 14:02:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 14:02:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-22 14:02:10,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:10,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238155921] [2021-12-22 14:02:10,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238155921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:02:10,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522577203] [2021-12-22 14:02:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:10,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:10,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:10,474 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:10,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 14:02:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:10,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-22 14:02:10,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:10,737 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 14:02:10,737 INFO L387 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 9 treesize of output 15 [2021-12-22 14:02:10,750 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 14:02:10,750 INFO L387 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 9 treesize of output 15 [2021-12-22 14:02:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 14:02:12,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 33 proven. 10 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-22 14:02:12,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522577203] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:02:12,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 14:02:12,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 9] total 34 [2021-12-22 14:02:12,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231157611] [2021-12-22 14:02:12,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 14:02:12,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 14:02:12,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:12,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 14:02:12,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 14:02:12,633 INFO L87 Difference]: Start difference. First operand 246 states and 312 transitions. Second operand has 34 states, 32 states have (on average 4.6875) internal successors, (150), 31 states have internal predecessors, (150), 14 states have call successors, (46), 4 states have call predecessors, (46), 9 states have return successors, (46), 14 states have call predecessors, (46), 14 states have call successors, (46) [2021-12-22 14:02:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:14,294 INFO L93 Difference]: Finished difference Result 484 states and 626 transitions. [2021-12-22 14:02:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-22 14:02:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 4.6875) internal successors, (150), 31 states have internal predecessors, (150), 14 states have call successors, (46), 4 states have call predecessors, (46), 9 states have return successors, (46), 14 states have call predecessors, (46), 14 states have call successors, (46) Word has length 148 [2021-12-22 14:02:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:14,296 INFO L225 Difference]: With dead ends: 484 [2021-12-22 14:02:14,296 INFO L226 Difference]: Without dead ends: 306 [2021-12-22 14:02:14,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 313 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=310, Invalid=2882, Unknown=0, NotChecked=0, Total=3192 [2021-12-22 14:02:14,300 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 142 mSDsluCounter, 3089 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 3245 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:14,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 3245 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1422 Invalid, 0 Unknown, 298 Unchecked, 1.0s Time] [2021-12-22 14:02:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-22 14:02:14,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 277. [2021-12-22 14:02:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 203 states have (on average 1.1822660098522169) internal successors, (240), 206 states have internal predecessors, (240), 49 states have call successors, (49), 23 states have call predecessors, (49), 24 states have return successors, (60), 47 states have call predecessors, (60), 48 states have call successors, (60) [2021-12-22 14:02:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 349 transitions. [2021-12-22 14:02:14,316 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 349 transitions. Word has length 148 [2021-12-22 14:02:14,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:14,316 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 349 transitions. [2021-12-22 14:02:14,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 4.6875) internal successors, (150), 31 states have internal predecessors, (150), 14 states have call successors, (46), 4 states have call predecessors, (46), 9 states have return successors, (46), 14 states have call predecessors, (46), 14 states have call successors, (46) [2021-12-22 14:02:14,317 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 349 transitions. [2021-12-22 14:02:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-22 14:02:14,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:14,318 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:14,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:14,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 14:02:14,535 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:14,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash -45537945, now seen corresponding path program 1 times [2021-12-22 14:02:14,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:14,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209918556] [2021-12-22 14:02:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:14,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:02:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:02:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:02:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:02:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:02:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:02:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:02:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:02:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:02:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 14:02:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 14:02:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:02:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 14:02:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-22 14:02:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-22 14:02:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-22 14:02:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-12-22 14:02:14,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:14,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209918556] [2021-12-22 14:02:14,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209918556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:02:14,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546451374] [2021-12-22 14:02:14,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:14,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:14,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:14,810 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:14,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 14:02:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 14:02:15,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-22 14:02:15,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:15,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546451374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:15,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:02:15,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 13 [2021-12-22 14:02:15,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977856363] [2021-12-22 14:02:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:15,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 14:02:15,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 14:02:15,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:02:15,467 INFO L87 Difference]: Start difference. First operand 277 states and 349 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 8 states have internal predecessors, (83), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-22 14:02:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:15,755 INFO L93 Difference]: Finished difference Result 504 states and 657 transitions. [2021-12-22 14:02:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 14:02:15,756 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 8 states have internal predecessors, (83), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 158 [2021-12-22 14:02:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:15,757 INFO L225 Difference]: With dead ends: 504 [2021-12-22 14:02:15,757 INFO L226 Difference]: Without dead ends: 306 [2021-12-22 14:02:15,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-12-22 14:02:15,758 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 20 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:15,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 917 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2021-12-22 14:02:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-22 14:02:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 285. [2021-12-22 14:02:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 210 states have (on average 1.1857142857142857) internal successors, (249), 212 states have internal predecessors, (249), 49 states have call successors, (49), 23 states have call predecessors, (49), 25 states have return successors, (65), 49 states have call predecessors, (65), 48 states have call successors, (65) [2021-12-22 14:02:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 363 transitions. [2021-12-22 14:02:15,774 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 363 transitions. Word has length 158 [2021-12-22 14:02:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:15,776 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 363 transitions. [2021-12-22 14:02:15,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 8 states have internal predecessors, (83), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-22 14:02:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 363 transitions. [2021-12-22 14:02:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-22 14:02:15,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:15,777 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:15,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:15,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 14:02:15,994 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:15,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:15,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1521220005, now seen corresponding path program 1 times [2021-12-22 14:02:15,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:15,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254095680] [2021-12-22 14:02:15,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:15,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:02:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:02:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:02:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:02:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:02:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:02:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 14:02:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:02:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:02:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 14:02:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 14:02:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:02:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 14:02:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-22 14:02:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-22 14:02:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-22 14:02:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-22 14:02:16,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:16,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254095680] [2021-12-22 14:02:16,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254095680] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:02:16,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809486992] [2021-12-22 14:02:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:16,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:16,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:16,220 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:16,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-22 14:02:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-22 14:02:16,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:16,527 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 14:02:16,527 INFO L387 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 9 treesize of output 15 [2021-12-22 14:02:16,539 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 14:02:16,539 INFO L387 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 9 treesize of output 15