./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_remove_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 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:07:23,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:07:23,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:07:23,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:07:23,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:07:23,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:07:23,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:07:23,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:07:23,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:07:23,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:07:23,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:07:23,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:07:23,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:07:23,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:07:23,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:07:23,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:07:23,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:07:23,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:07:23,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:07:23,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:07:23,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:07:23,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:07:23,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:07:23,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:07:23,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:07:23,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:07:23,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:07:23,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:07:23,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:07:23,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:07:23,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:07:23,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:07:23,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:07:23,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:07:23,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:07:23,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:07:23,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:07:23,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:07:23,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:07:23,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:07:23,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:07:23,947 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:07:23,981 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:07:23,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:07:23,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:07:23,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:07:23,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:07:23,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:07:23,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:07:23,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:07:23,984 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:07:23,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:07:23,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:07:23,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:07:23,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:07:23,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:07:23,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:07:23,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:07:23,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:07:23,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:07:23,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:07:23,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:07:23,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:07:23,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:07:23,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:07:23,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:07:23,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:07:23,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:07:23,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:07:23,989 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:07:23,989 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:07:23,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:07:23,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:07:23,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2021-12-14 17:07:24,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:07:24,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:07:24,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:07:24,232 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:07:24,233 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:07:24,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-12-14 17:07:24,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/298f18c00/e12f346bafb446cbade1497c069bcded/FLAGa385c4dbf [2021-12-14 17:07:24,956 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:07:24,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-12-14 17:07:25,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/298f18c00/e12f346bafb446cbade1497c069bcded/FLAGa385c4dbf [2021-12-14 17:07:25,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/298f18c00/e12f346bafb446cbade1497c069bcded [2021-12-14 17:07:25,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:07:25,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:07:25,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:07:25,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:07:25,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:07:25,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:07:25" (1/1) ... [2021-12-14 17:07:25,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277a8354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:25, skipping insertion in model container [2021-12-14 17:07:25,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:07:25" (1/1) ... [2021-12-14 17:07:25,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:07:25,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:07:25,457 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_remove_harness.i[4496,4509] [2021-12-14 17:07:25,462 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_remove_harness.i[4556,4569] [2021-12-14 17:07:26,027 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,028 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,029 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,030 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,030 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,041 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,042 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,043 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,043 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,045 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,045 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,046 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,046 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,255 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:07:26,256 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:07:26,257 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:07:26,258 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:07:26,259 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:07:26,260 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:07:26,260 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:07:26,261 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:07:26,261 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:07:26,262 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:07:26,356 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:07:26,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:07:26,456 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:07:26,478 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_remove_harness.i[4496,4509] [2021-12-14 17:07:26,479 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_remove_harness.i[4556,4569] [2021-12-14 17:07:26,540 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,541 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,543 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,544 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,546 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,555 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,556 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,560 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,560 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,561 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,562 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,562 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,562 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:26,589 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:07:26,592 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:07:26,593 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:07:26,594 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:07:26,598 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:07:26,600 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:07:26,600 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:07:26,601 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:07:26,601 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:07:26,601 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:07:26,618 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:07:26,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:07:26,799 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:07:26,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:26 WrapperNode [2021-12-14 17:07:26,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:07:26,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:07:26,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:07:26,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:07:26,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:26" (1/1) ... [2021-12-14 17:07:26,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:26" (1/1) ... [2021-12-14 17:07:26,926 INFO L137 Inliner]: procedures = 679, calls = 1048, calls flagged for inlining = 49, calls inlined = 4, statements flattened = 89 [2021-12-14 17:07:26,927 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:07:26,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:07:26,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:07:26,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:07:26,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:26" (1/1) ... [2021-12-14 17:07:26,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:26" (1/1) ... [2021-12-14 17:07:26,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:26" (1/1) ... [2021-12-14 17:07:26,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:26" (1/1) ... [2021-12-14 17:07:26,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:26" (1/1) ... [2021-12-14 17:07:26,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:26" (1/1) ... [2021-12-14 17:07:26,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:26" (1/1) ... [2021-12-14 17:07:26,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:07:26,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:07:26,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:07:26,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:07:26,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:26" (1/1) ... [2021-12-14 17:07:27,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:07:27,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:27,030 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) [2021-12-14 17:07:27,052 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 [2021-12-14 17:07:27,076 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-14 17:07:27,077 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-14 17:07:27,077 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-12-14 17:07:27,077 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-12-14 17:07:27,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:07:27,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:07:27,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:07:27,079 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:07:27,079 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-14 17:07:27,080 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-14 17:07:27,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:07:27,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:07:27,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:07:27,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:07:27,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-14 17:07:27,080 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-14 17:07:27,081 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:07:27,081 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:07:27,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:07:27,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:07:27,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:07:27,081 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-12-14 17:07:27,082 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-12-14 17:07:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:07:27,316 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:07:27,318 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:07:27,549 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:07:27,555 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:07:27,563 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 17:07:27,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:07:27 BoogieIcfgContainer [2021-12-14 17:07:27,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:07:27,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:07:27,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:07:27,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:07:27,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:07:25" (1/3) ... [2021-12-14 17:07:27,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18406306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:07:27, skipping insertion in model container [2021-12-14 17:07:27,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:26" (2/3) ... [2021-12-14 17:07:27,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18406306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:07:27, skipping insertion in model container [2021-12-14 17:07:27,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:07:27" (3/3) ... [2021-12-14 17:07:27,575 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2021-12-14 17:07:27,580 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:07:27,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:07:27,636 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:07:27,649 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 [2021-12-14 17:07:27,649 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:07:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-14 17:07:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 17:07:27,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:27,679 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:07:27,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:27,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1155526354, now seen corresponding path program 1 times [2021-12-14 17:07:27,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:27,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994543725] [2021-12-14 17:07:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:27,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 17:07:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:07:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:07:28,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:28,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994543725] [2021-12-14 17:07:28,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994543725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:28,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:28,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:07:28,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009382188] [2021-12-14 17:07:28,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:28,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:07:28,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:07:28,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:07:28,365 INFO L87 Difference]: Start difference. First operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:07:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:28,511 INFO L93 Difference]: Finished difference Result 147 states and 204 transitions. [2021-12-14 17:07:28,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:07:28,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-12-14 17:07:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:28,523 INFO L225 Difference]: With dead ends: 147 [2021-12-14 17:07:28,539 INFO L226 Difference]: Without dead ends: 73 [2021-12-14 17:07:28,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:07:28,546 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 28 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:28,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 434 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:07:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-14 17:07:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-12-14 17:07:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-14 17:07:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-12-14 17:07:28,595 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 48 [2021-12-14 17:07:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:28,596 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-12-14 17:07:28,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:07:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-12-14 17:07:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 17:07:28,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:28,598 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:07:28,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:07:28,599 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:28,599 INFO L85 PathProgramCache]: Analyzing trace with hash 209823880, now seen corresponding path program 1 times [2021-12-14 17:07:28,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:28,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326472754] [2021-12-14 17:07:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:28,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 17:07:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:07:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:07:28,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:28,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326472754] [2021-12-14 17:07:28,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326472754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:28,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:28,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:07:28,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791164124] [2021-12-14 17:07:28,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:28,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:07:28,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:28,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:07:28,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:07:28,868 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:07:29,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:29,243 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2021-12-14 17:07:29,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:07:29,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2021-12-14 17:07:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:29,248 INFO L225 Difference]: With dead ends: 143 [2021-12-14 17:07:29,248 INFO L226 Difference]: Without dead ends: 77 [2021-12-14 17:07:29,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:07:29,254 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 68 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:29,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 244 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 17:07:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-14 17:07:29,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-12-14 17:07:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2021-12-14 17:07:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-12-14 17:07:29,272 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 54 [2021-12-14 17:07:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:29,273 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-12-14 17:07:29,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:07:29,273 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-12-14 17:07:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 17:07:29,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:29,275 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:07:29,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:07:29,275 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:29,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:29,276 INFO L85 PathProgramCache]: Analyzing trace with hash 637356428, now seen corresponding path program 1 times [2021-12-14 17:07:29,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:29,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444053521] [2021-12-14 17:07:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:29,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 17:07:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:07:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:07:29,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:29,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444053521] [2021-12-14 17:07:29,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444053521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:29,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:29,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:07:29,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400538363] [2021-12-14 17:07:29,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:29,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:07:29,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:29,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:07:29,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:07:29,475 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 17:07:29,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:29,739 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2021-12-14 17:07:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:07:29,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2021-12-14 17:07:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:29,745 INFO L225 Difference]: With dead ends: 87 [2021-12-14 17:07:29,745 INFO L226 Difference]: Without dead ends: 85 [2021-12-14 17:07:29,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:07:29,753 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 46 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:29,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 267 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:07:29,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-14 17:07:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-12-14 17:07:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 55 states have internal predecessors, (61), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-14 17:07:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2021-12-14 17:07:29,776 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 54 [2021-12-14 17:07:29,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:29,776 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2021-12-14 17:07:29,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 17:07:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2021-12-14 17:07:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 17:07:29,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:29,780 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:07:29,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:07:29,781 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:29,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:29,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2089548669, now seen corresponding path program 1 times [2021-12-14 17:07:29,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:29,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291984084] [2021-12-14 17:07:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:29,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 17:07:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:07:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:07:30,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:30,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291984084] [2021-12-14 17:07:30,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291984084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:30,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:30,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:07:30,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605759798] [2021-12-14 17:07:30,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:30,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:07:30,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:30,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:07:30,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:07:30,108 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:07:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:30,291 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2021-12-14 17:07:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:07:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2021-12-14 17:07:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:30,292 INFO L225 Difference]: With dead ends: 145 [2021-12-14 17:07:30,292 INFO L226 Difference]: Without dead ends: 82 [2021-12-14 17:07:30,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:07:30,294 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 39 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:30,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 177 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:07:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-14 17:07:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-12-14 17:07:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.169811320754717) internal successors, (62), 56 states have internal predecessors, (62), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-14 17:07:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-12-14 17:07:30,303 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 54 [2021-12-14 17:07:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:30,303 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-12-14 17:07:30,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:07:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-12-14 17:07:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 17:07:30,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:30,305 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:07:30,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:07:30,305 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:30,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:30,306 INFO L85 PathProgramCache]: Analyzing trace with hash -247571742, now seen corresponding path program 1 times [2021-12-14 17:07:30,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:30,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485591461] [2021-12-14 17:07:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:30,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 17:07:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:07:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:07:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:07:30,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:30,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485591461] [2021-12-14 17:07:30,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485591461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:30,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231344484] [2021-12-14 17:07:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:30,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:30,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:30,555 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) [2021-12-14 17:07:30,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:07:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 17:07:30,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:30,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:07:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:07:31,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:31,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-14 17:07:31,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-14 17:07:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:07:31,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231344484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:07:31,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:07:31,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2021-12-14 17:07:31,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742245783] [2021-12-14 17:07:31,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:31,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 17:07:31,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:31,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 17:07:31,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:07:31,996 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-14 17:07:32,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:32,611 INFO L93 Difference]: Finished difference Result 150 states and 182 transitions. [2021-12-14 17:07:32,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:07:32,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 55 [2021-12-14 17:07:32,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:32,613 INFO L225 Difference]: With dead ends: 150 [2021-12-14 17:07:32,613 INFO L226 Difference]: Without dead ends: 87 [2021-12-14 17:07:32,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-12-14 17:07:32,614 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 42 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:32,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 356 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 384 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2021-12-14 17:07:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-14 17:07:32,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2021-12-14 17:07:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 57 states have internal predecessors, (63), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-14 17:07:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-12-14 17:07:32,630 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 55 [2021-12-14 17:07:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:32,630 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-12-14 17:07:32,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-14 17:07:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-12-14 17:07:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-14 17:07:32,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:32,632 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:07:32,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 17:07:32,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:32,833 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:32,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1019138147, now seen corresponding path program 2 times [2021-12-14 17:07:32,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:32,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872378840] [2021-12-14 17:07:32,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:32,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:32,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 17:07:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:32,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:32,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:32,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:32,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:33,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:07:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:33,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:07:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:07:33,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:33,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872378840] [2021-12-14 17:07:33,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872378840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:33,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381624652] [2021-12-14 17:07:33,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:07:33,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:33,124 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) [2021-12-14 17:07:33,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:07:33,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:07:33,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:07:33,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-14 17:07:33,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:33,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-14 17:07:33,582 INFO L354 Elim1Store]: treesize reduction 30, result has 25.0 percent of original size [2021-12-14 17:07:33,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-14 17:07:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:07:36,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:36,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-14 17:07:36,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 64 [2021-12-14 17:07:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:07:36,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381624652] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:07:36,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:07:36,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2021-12-14 17:07:36,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84353364] [2021-12-14 17:07:36,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:36,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 17:07:36,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:36,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 17:07:36,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=358, Unknown=1, NotChecked=0, Total=420 [2021-12-14 17:07:36,622 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 19 states have internal predecessors, (56), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-14 17:07:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:37,330 INFO L93 Difference]: Finished difference Result 152 states and 184 transitions. [2021-12-14 17:07:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 17:07:37,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 19 states have internal predecessors, (56), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 56 [2021-12-14 17:07:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:37,332 INFO L225 Difference]: With dead ends: 152 [2021-12-14 17:07:37,332 INFO L226 Difference]: Without dead ends: 87 [2021-12-14 17:07:37,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=105, Invalid=650, Unknown=1, NotChecked=0, Total=756 [2021-12-14 17:07:37,334 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 49 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:37,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 336 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 415 Invalid, 0 Unknown, 140 Unchecked, 0.5s Time] [2021-12-14 17:07:37,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-14 17:07:37,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-12-14 17:07:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 60 states have internal predecessors, (67), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-14 17:07:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2021-12-14 17:07:37,343 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 56 [2021-12-14 17:07:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:37,343 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2021-12-14 17:07:37,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 19 states have internal predecessors, (56), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-14 17:07:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2021-12-14 17:07:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-14 17:07:37,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:37,345 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:07:37,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:37,559 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,SelfDestructingSolverStorable5 [2021-12-14 17:07:37,560 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash 223290509, now seen corresponding path program 1 times [2021-12-14 17:07:37,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:37,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632711815] [2021-12-14 17:07:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:37,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 17:07:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:07:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:07:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 17:07:37,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632711815] [2021-12-14 17:07:37,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632711815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770641213] [2021-12-14 17:07:37,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:37,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:37,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:37,900 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) [2021-12-14 17:07:37,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:07:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 122 conjunts are in the unsatisfiable core [2021-12-14 17:07:38,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:38,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:38,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:38,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:38,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:38,246 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:07:38,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2021-12-14 17:07:38,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:38,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:38,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:38,268 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:07:38,268 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 28 [2021-12-14 17:07:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:38,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 17 [2021-12-14 17:07:38,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-14 17:07:38,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-14 17:07:38,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 51 treesize of output 31 [2021-12-14 17:07:38,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 34 [2021-12-14 17:07:38,916 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:07:38,917 INFO L388 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 25 treesize of output 32 [2021-12-14 17:07:38,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-14 17:07:39,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:07:39,098 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-14 17:07:39,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 17:07:39,150 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-12-14 17:07:39,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-12-14 17:07:39,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 17:07:39,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:40,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-14 17:07:40,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-14 17:07:40,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 178 [2021-12-14 17:07:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:07:40,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770641213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:07:40,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:07:40,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 20, 11] total 35 [2021-12-14 17:07:40,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486799047] [2021-12-14 17:07:40,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:40,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-14 17:07:40,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-14 17:07:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 17:07:40,490 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 35 states, 33 states have (on average 2.696969696969697) internal successors, (89), 31 states have internal predecessors, (89), 7 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-14 17:07:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:41,447 INFO L93 Difference]: Finished difference Result 202 states and 250 transitions. [2021-12-14 17:07:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 17:07:41,448 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.696969696969697) internal successors, (89), 31 states have internal predecessors, (89), 7 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2021-12-14 17:07:41,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:41,450 INFO L225 Difference]: With dead ends: 202 [2021-12-14 17:07:41,450 INFO L226 Difference]: Without dead ends: 137 [2021-12-14 17:07:41,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-12-14 17:07:41,452 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 66 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:41,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1023 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 562 Invalid, 0 Unknown, 538 Unchecked, 0.5s Time] [2021-12-14 17:07:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-14 17:07:41,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 120. [2021-12-14 17:07:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 87 states have internal predecessors, (100), 21 states have call successors, (21), 12 states have call predecessors, (21), 15 states have return successors, (25), 20 states have call predecessors, (25), 20 states have call successors, (25) [2021-12-14 17:07:41,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2021-12-14 17:07:41,470 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 60 [2021-12-14 17:07:41,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:41,470 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2021-12-14 17:07:41,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.696969696969697) internal successors, (89), 31 states have internal predecessors, (89), 7 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-14 17:07:41,471 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2021-12-14 17:07:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 17:07:41,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:41,472 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-12-14 17:07:41,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:41,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:41,696 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:41,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:41,696 INFO L85 PathProgramCache]: Analyzing trace with hash 25790573, now seen corresponding path program 2 times [2021-12-14 17:07:41,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:41,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740934160] [2021-12-14 17:07:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:41,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:41,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 17:07:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:41,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:41,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:41,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:41,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:41,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:07:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:42,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:07:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 17:07:42,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:42,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740934160] [2021-12-14 17:07:42,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740934160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:42,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024709571] [2021-12-14 17:07:42,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:07:42,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:42,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:42,052 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) [2021-12-14 17:07:42,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:07:42,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:07:42,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:07:42,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-14 17:07:42,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:42,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-14 17:07:42,493 INFO L354 Elim1Store]: treesize reduction 30, result has 25.0 percent of original size [2021-12-14 17:07:42,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-14 17:07:42,575 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-12-14 17:07:42,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-14 17:07:42,654 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-12-14 17:07:42,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-14 17:07:42,726 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-12-14 17:07:42,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-14 17:07:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:07:43,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:44,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-12-14 17:07:55,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-14 17:07:55,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6030 treesize of output 5998