./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 00:59:15,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 00:59:15,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 00:59:15,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 00:59:15,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 00:59:15,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 00:59:15,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 00:59:15,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 00:59:15,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 00:59:15,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 00:59:15,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 00:59:15,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 00:59:15,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 00:59:15,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 00:59:15,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 00:59:15,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 00:59:15,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 00:59:15,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 00:59:15,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 00:59:15,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 00:59:15,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 00:59:15,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 00:59:15,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 00:59:15,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 00:59:15,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 00:59:15,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 00:59:15,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 00:59:15,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 00:59:15,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 00:59:15,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 00:59:15,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 00:59:15,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 00:59:15,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 00:59:15,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 00:59:15,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 00:59:15,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 00:59:15,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 00:59:15,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 00:59:15,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 00:59:15,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 00:59:15,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 00:59:15,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-18 00:59:15,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 00:59:15,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 00:59:15,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 00:59:15,714 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 00:59:15,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 00:59:15,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 00:59:15,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 00:59:15,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 00:59:15,715 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 00:59:15,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 00:59:15,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 00:59:15,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 00:59:15,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 00:59:15,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 00:59:15,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 00:59:15,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 00:59:15,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 00:59:15,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 00:59:15,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 00:59:15,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 00:59:15,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 00:59:15,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:59:15,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 00:59:15,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 00:59:15,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 00:59:15,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 00:59:15,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 00:59:15,718 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 00:59:15,719 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 00:59:15,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 00:59:15,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 00:59:15,719 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 [2021-12-18 00:59:15,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 00:59:15,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 00:59:15,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 00:59:15,889 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 00:59:15,889 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 00:59:15,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-12-18 00:59:15,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd6cab83/560a6243afc14ef3b4529b0966d0788c/FLAG4034ec28e [2021-12-18 00:59:16,483 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 00:59:16,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-12-18 00:59:16,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd6cab83/560a6243afc14ef3b4529b0966d0788c/FLAG4034ec28e [2021-12-18 00:59:16,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd6cab83/560a6243afc14ef3b4529b0966d0788c [2021-12-18 00:59:16,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 00:59:16,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 00:59:16,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 00:59:16,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 00:59:16,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 00:59:16,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:59:16" (1/1) ... [2021-12-18 00:59:16,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4599cd36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:16, skipping insertion in model container [2021-12-18 00:59:16,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:59:16" (1/1) ... [2021-12-18 00:59:16,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 00:59:17,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:59:17,187 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_rbegin_harness.i[4496,4509] [2021-12-18 00:59:17,192 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_rbegin_harness.i[4556,4569] [2021-12-18 00:59:17,639 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,640 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,641 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,642 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,643 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,655 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,656 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,659 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,660 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,662 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,662 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,663 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,664 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,835 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:59:17,836 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:59:17,837 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:59:17,837 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:59:17,838 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:59:17,839 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:59:17,839 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:59:17,839 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:59:17,840 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:59:17,840 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:59:17,901 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:59:17,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:59:17,922 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 00:59:17,930 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_rbegin_harness.i[4496,4509] [2021-12-18 00:59:17,931 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_rbegin_harness.i[4556,4569] [2021-12-18 00:59:17,952 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,952 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,952 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,953 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,953 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,957 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,957 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,958 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,958 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,959 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,959 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,959 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,960 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:17,996 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:59:17,997 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:59:17,997 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:59:17,998 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:59:17,998 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:59:17,999 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:59:17,999 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:59:18,005 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:59:18,005 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:59:18,005 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:59:18,018 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:59:18,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:59:18,154 INFO L208 MainTranslator]: Completed translation [2021-12-18 00:59:18,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:18 WrapperNode [2021-12-18 00:59:18,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 00:59:18,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 00:59:18,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 00:59:18,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 00:59:18,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:18" (1/1) ... [2021-12-18 00:59:18,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:18" (1/1) ... [2021-12-18 00:59:18,249 INFO L137 Inliner]: procedures = 679, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 142 [2021-12-18 00:59:18,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 00:59:18,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 00:59:18,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 00:59:18,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 00:59:18,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:18" (1/1) ... [2021-12-18 00:59:18,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:18" (1/1) ... [2021-12-18 00:59:18,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:18" (1/1) ... [2021-12-18 00:59:18,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:18" (1/1) ... [2021-12-18 00:59:18,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:18" (1/1) ... [2021-12-18 00:59:18,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:18" (1/1) ... [2021-12-18 00:59:18,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:18" (1/1) ... [2021-12-18 00:59:18,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 00:59:18,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 00:59:18,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 00:59:18,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 00:59:18,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:18" (1/1) ... [2021-12-18 00:59:18,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:59:18,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:18,329 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) [2021-12-18 00:59:18,346 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 [2021-12-18 00:59:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 00:59:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 00:59:18,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 00:59:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-18 00:59:18,359 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-18 00:59:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 00:59:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-18 00:59:18,360 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-18 00:59:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 00:59:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 00:59:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 00:59:18,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 00:59:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 00:59:18,361 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 00:59:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 00:59:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 00:59:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 00:59:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-18 00:59:18,362 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-18 00:59:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 00:59:18,570 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 00:59:18,571 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 00:59:18,725 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 00:59:18,730 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 00:59:18,730 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 00:59:18,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:59:18 BoogieIcfgContainer [2021-12-18 00:59:18,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 00:59:18,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 00:59:18,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 00:59:18,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 00:59:18,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 12:59:16" (1/3) ... [2021-12-18 00:59:18,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f7b496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:59:18, skipping insertion in model container [2021-12-18 00:59:18,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:18" (2/3) ... [2021-12-18 00:59:18,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f7b496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:59:18, skipping insertion in model container [2021-12-18 00:59:18,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:59:18" (3/3) ... [2021-12-18 00:59:18,736 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness.i [2021-12-18 00:59:18,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 00:59:18,740 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 00:59:18,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 00:59:18,770 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 [2021-12-18 00:59:18,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 00:59:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 00:59:18,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 00:59:18,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:18,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:18,787 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:18,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:18,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1062572114, now seen corresponding path program 1 times [2021-12-18 00:59:18,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:18,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613956106] [2021-12-18 00:59:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:18,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:18,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:59:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:59:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:59:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:59:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:59:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 00:59:19,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613956106] [2021-12-18 00:59:19,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613956106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:19,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:59:19,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 00:59:19,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993683783] [2021-12-18 00:59:19,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:19,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 00:59:19,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:19,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 00:59:19,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 00:59:19,207 INFO L87 Difference]: Start difference. First operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:59:19,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:19,238 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2021-12-18 00:59:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 00:59:19,241 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-12-18 00:59:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:19,247 INFO L225 Difference]: With dead ends: 130 [2021-12-18 00:59:19,247 INFO L226 Difference]: Without dead ends: 64 [2021-12-18 00:59:19,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 00:59:19,253 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:19,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:59:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-18 00:59:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-18 00:59:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-18 00:59:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2021-12-18 00:59:19,290 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 68 [2021-12-18 00:59:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:19,290 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2021-12-18 00:59:19,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:59:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2021-12-18 00:59:19,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 00:59:19,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:19,295 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:19,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 00:59:19,296 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:19,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:19,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1946087212, now seen corresponding path program 1 times [2021-12-18 00:59:19,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:19,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380699627] [2021-12-18 00:59:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:19,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:59:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:59:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:59:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:59:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:59:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 00:59:19,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:19,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380699627] [2021-12-18 00:59:19,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380699627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:19,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931278314] [2021-12-18 00:59:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:19,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:19,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:19,574 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) [2021-12-18 00:59:19,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 00:59:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:19,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-18 00:59:19,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:19,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:19,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-18 00:59:19,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:19,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-18 00:59:19,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:19,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-18 00:59:19,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:19,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:19,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:19,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-18 00:59:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:59:20,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:59:20,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931278314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:20,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:59:20,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2021-12-18 00:59:20,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32583088] [2021-12-18 00:59:20,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:20,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:59:20,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:59:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:59:20,228 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-18 00:59:20,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:20,337 INFO L93 Difference]: Finished difference Result 147 states and 198 transitions. [2021-12-18 00:59:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:59:20,338 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-12-18 00:59:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:20,341 INFO L225 Difference]: With dead ends: 147 [2021-12-18 00:59:20,341 INFO L226 Difference]: Without dead ends: 95 [2021-12-18 00:59:20,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-18 00:59:20,346 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 26 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:20,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 470 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2021-12-18 00:59:20,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-18 00:59:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2021-12-18 00:59:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 61 states have internal predecessors, (78), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-18 00:59:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2021-12-18 00:59:20,363 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 68 [2021-12-18 00:59:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:20,363 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2021-12-18 00:59:20,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-18 00:59:20,364 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2021-12-18 00:59:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 00:59:20,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:20,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:20,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:20,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:20,584 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash -103300630, now seen corresponding path program 1 times [2021-12-18 00:59:20,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:20,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759032862] [2021-12-18 00:59:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:20,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:20,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:20,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:20,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:59:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:20,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:59:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:20,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:59:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:20,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:59:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:20,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:59:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 00:59:20,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:20,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759032862] [2021-12-18 00:59:20,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759032862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:20,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028929367] [2021-12-18 00:59:20,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:20,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:20,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:20,720 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) [2021-12-18 00:59:20,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 00:59:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:20,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 00:59:20,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:20,963 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-18 00:59:20,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 55 [2021-12-18 00:59:20,970 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 10 treesize of output 9 [2021-12-18 00:59:20,978 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 16 treesize of output 15 [2021-12-18 00:59:21,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-12-18 00:59:21,045 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 32 treesize of output 26 [2021-12-18 00:59:21,048 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 21 treesize of output 13 [2021-12-18 00:59:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:59:21,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:59:21,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028929367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:21,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:59:21,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2021-12-18 00:59:21,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018537946] [2021-12-18 00:59:21,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:21,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 00:59:21,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:21,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 00:59:21,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:59:21,372 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-18 00:59:21,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:21,535 INFO L93 Difference]: Finished difference Result 196 states and 266 transitions. [2021-12-18 00:59:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 00:59:21,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-12-18 00:59:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:21,544 INFO L225 Difference]: With dead ends: 196 [2021-12-18 00:59:21,544 INFO L226 Difference]: Without dead ends: 140 [2021-12-18 00:59:21,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-18 00:59:21,545 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 123 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:21,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 691 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 71 Invalid, 0 Unknown, 138 Unchecked, 0.1s Time] [2021-12-18 00:59:21,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-18 00:59:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 125. [2021-12-18 00:59:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 1.315217391304348) internal successors, (121), 94 states have internal predecessors, (121), 23 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (26), 21 states have call predecessors, (26), 21 states have call successors, (26) [2021-12-18 00:59:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 170 transitions. [2021-12-18 00:59:21,558 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 170 transitions. Word has length 68 [2021-12-18 00:59:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:21,558 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 170 transitions. [2021-12-18 00:59:21,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-18 00:59:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 170 transitions. [2021-12-18 00:59:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 00:59:21,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:21,559 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:21,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:21,767 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,SelfDestructingSolverStorable2 [2021-12-18 00:59:21,767 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1824972072, now seen corresponding path program 1 times [2021-12-18 00:59:21,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:21,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620529431] [2021-12-18 00:59:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:21,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:21,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:21,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:21,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:59:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:21,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:59:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:21,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:59:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:21,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:59:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:21,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:59:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 00:59:21,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:21,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620529431] [2021-12-18 00:59:21,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620529431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:21,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202864910] [2021-12-18 00:59:21,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:21,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:21,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:21,873 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) [2021-12-18 00:59:21,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 00:59:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:21,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 00:59:21,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:22,061 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:59:22,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:59:22,080 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:59:22,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:59:22,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:59:22,691 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 00:59:22,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 30 [2021-12-18 00:59:22,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:59:22,698 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:59:22,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-12-18 00:59:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 00:59:22,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:59:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:59:23,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202864910] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:59:23,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:59:23,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 12] total 28 [2021-12-18 00:59:23,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470360403] [2021-12-18 00:59:23,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:59:23,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 00:59:23,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:23,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 00:59:23,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-12-18 00:59:23,229 INFO L87 Difference]: Start difference. First operand 125 states and 170 transitions. Second operand has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-18 00:59:24,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:24,554 INFO L93 Difference]: Finished difference Result 356 states and 580 transitions. [2021-12-18 00:59:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 00:59:24,557 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 68 [2021-12-18 00:59:24,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:24,562 INFO L225 Difference]: With dead ends: 356 [2021-12-18 00:59:24,562 INFO L226 Difference]: Without dead ends: 261 [2021-12-18 00:59:24,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=396, Invalid=2684, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 00:59:24,564 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 185 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:24,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1624 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1134 Invalid, 0 Unknown, 299 Unchecked, 0.7s Time] [2021-12-18 00:59:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-18 00:59:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 223. [2021-12-18 00:59:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 160 states have (on average 1.3125) internal successors, (210), 166 states have internal predecessors, (210), 45 states have call successors, (45), 13 states have call predecessors, (45), 17 states have return successors, (110), 43 states have call predecessors, (110), 43 states have call successors, (110) [2021-12-18 00:59:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 365 transitions. [2021-12-18 00:59:24,602 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 365 transitions. Word has length 68 [2021-12-18 00:59:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:24,603 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 365 transitions. [2021-12-18 00:59:24,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-18 00:59:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 365 transitions. [2021-12-18 00:59:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-18 00:59:24,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:24,605 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:24,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:24,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:24,819 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:24,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:24,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1195332088, now seen corresponding path program 1 times [2021-12-18 00:59:24,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:24,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326204001] [2021-12-18 00:59:24,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:24,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:24,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:24,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:24,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:59:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:24,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:59:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:24,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:59:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:24,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:59:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:24,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:59:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-18 00:59:24,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:24,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326204001] [2021-12-18 00:59:24,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326204001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:24,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901244396] [2021-12-18 00:59:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:24,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:24,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:24,920 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) [2021-12-18 00:59:24,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 00:59:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:25,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 00:59:25,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:59:25,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:59:25,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901244396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:25,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:59:25,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-12-18 00:59:25,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929206609] [2021-12-18 00:59:25,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:25,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:59:25,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:25,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:59:25,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:59:25,174 INFO L87 Difference]: Start difference. First operand 223 states and 365 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:59:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:25,288 INFO L93 Difference]: Finished difference Result 406 states and 705 transitions. [2021-12-18 00:59:25,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:59:25,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-12-18 00:59:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:25,290 INFO L225 Difference]: With dead ends: 406 [2021-12-18 00:59:25,290 INFO L226 Difference]: Without dead ends: 232 [2021-12-18 00:59:25,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:59:25,292 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 107 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:25,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 245 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:59:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-18 00:59:25,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-12-18 00:59:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 166 states have (on average 1.2891566265060241) internal successors, (214), 175 states have internal predecessors, (214), 45 states have call successors, (45), 13 states have call predecessors, (45), 20 states have return successors, (134), 43 states have call predecessors, (134), 43 states have call successors, (134) [2021-12-18 00:59:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 393 transitions. [2021-12-18 00:59:25,310 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 393 transitions. Word has length 70 [2021-12-18 00:59:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:25,310 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 393 transitions. [2021-12-18 00:59:25,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:59:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 393 transitions. [2021-12-18 00:59:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-18 00:59:25,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:25,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:25,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:25,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:25,512 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:25,513 INFO L85 PathProgramCache]: Analyzing trace with hash -316025515, now seen corresponding path program 1 times [2021-12-18 00:59:25,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:25,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321421774] [2021-12-18 00:59:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:25,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:25,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:25,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:25,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:59:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:25,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:59:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:25,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:59:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:25,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:59:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:25,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-18 00:59:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 00:59:25,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:25,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321421774] [2021-12-18 00:59:25,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321421774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:25,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790900023] [2021-12-18 00:59:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:25,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:25,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:25,625 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:59:25,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 00:59:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:25,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 00:59:25,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:59:25,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:59:25,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790900023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:25,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:59:25,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-12-18 00:59:25,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469065096] [2021-12-18 00:59:25,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:25,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:59:25,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:25,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:59:25,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-18 00:59:25,894 INFO L87 Difference]: Start difference. First operand 232 states and 393 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:59:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:26,060 INFO L93 Difference]: Finished difference Result 453 states and 841 transitions. [2021-12-18 00:59:26,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:59:26,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-18 00:59:26,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:26,062 INFO L225 Difference]: With dead ends: 453 [2021-12-18 00:59:26,062 INFO L226 Difference]: Without dead ends: 268 [2021-12-18 00:59:26,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-12-18 00:59:26,064 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 144 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:26,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 291 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:59:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-18 00:59:26,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2021-12-18 00:59:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 172 states have (on average 1.2848837209302326) internal successors, (221), 181 states have internal predecessors, (221), 45 states have call successors, (45), 13 states have call predecessors, (45), 20 states have return successors, (134), 43 states have call predecessors, (134), 43 states have call successors, (134) [2021-12-18 00:59:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 400 transitions. [2021-12-18 00:59:26,094 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 400 transitions. Word has length 72 [2021-12-18 00:59:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:26,095 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 400 transitions. [2021-12-18 00:59:26,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:59:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 400 transitions. [2021-12-18 00:59:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 00:59:26,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:26,096 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:26,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:26,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:26,311 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:26,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:26,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1928092350, now seen corresponding path program 1 times [2021-12-18 00:59:26,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:26,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545429666] [2021-12-18 00:59:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:26,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:59:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:59:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-18 00:59:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:59:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:59:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 00:59:26,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:26,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545429666] [2021-12-18 00:59:26,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545429666] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:26,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938671520] [2021-12-18 00:59:26,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:26,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:26,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:26,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:59:26,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 00:59:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 00:59:26,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-18 00:59:26,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:59:26,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938671520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:26,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:59:26,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-18 00:59:26,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637848002] [2021-12-18 00:59:26,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:26,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 00:59:26,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:26,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 00:59:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:59:26,629 INFO L87 Difference]: Start difference. First operand 238 states and 400 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:59:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:26,655 INFO L93 Difference]: Finished difference Result 448 states and 861 transitions. [2021-12-18 00:59:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 00:59:26,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-12-18 00:59:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:26,657 INFO L225 Difference]: With dead ends: 448 [2021-12-18 00:59:26,658 INFO L226 Difference]: Without dead ends: 257 [2021-12-18 00:59:26,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:59:26,660 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:26,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 163 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:59:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-18 00:59:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 230. [2021-12-18 00:59:26,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 166 states have (on average 1.283132530120482) internal successors, (213), 173 states have internal predecessors, (213), 45 states have call successors, (45), 13 states have call predecessors, (45), 18 states have return successors, (132), 43 states have call predecessors, (132), 43 states have call successors, (132) [2021-12-18 00:59:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 390 transitions. [2021-12-18 00:59:26,674 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 390 transitions. Word has length 73 [2021-12-18 00:59:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:26,675 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 390 transitions. [2021-12-18 00:59:26,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:59:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 390 transitions. [2021-12-18 00:59:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-18 00:59:26,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:26,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:26,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:26,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:26,894 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:26,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1085947066, now seen corresponding path program 1 times [2021-12-18 00:59:26,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:26,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950514605] [2021-12-18 00:59:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:26,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 00:59:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:26,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-18 00:59:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:27,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-18 00:59:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:27,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 00:59:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-18 00:59:27,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:27,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950514605] [2021-12-18 00:59:27,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950514605] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:27,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645236569] [2021-12-18 00:59:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:27,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:27,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:27,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:59:27,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 00:59:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:27,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 00:59:27,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:27,205 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:59:27,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:59:27,214 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:59:27,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:59:27,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:59:27,867 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 00:59:27,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-12-18 00:59:27,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:59:27,872 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:59:27,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 1 [2021-12-18 00:59:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 00:59:27,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:59:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 00:59:28,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645236569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:59:28,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:59:28,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 10] total 26 [2021-12-18 00:59:28,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016472718] [2021-12-18 00:59:28,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:59:28,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:59:28,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:59:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-12-18 00:59:28,372 INFO L87 Difference]: Start difference. First operand 230 states and 390 transitions. Second operand has 26 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 10 states have call successors, (20), 4 states have call predecessors, (20), 9 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-18 00:59:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:28,834 INFO L93 Difference]: Finished difference Result 481 states and 895 transitions. [2021-12-18 00:59:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 00:59:28,834 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 10 states have call successors, (20), 4 states have call predecessors, (20), 9 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 83 [2021-12-18 00:59:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:28,837 INFO L225 Difference]: With dead ends: 481 [2021-12-18 00:59:28,838 INFO L226 Difference]: Without dead ends: 297 [2021-12-18 00:59:28,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 00:59:28,840 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 111 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:28,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1037 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 279 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2021-12-18 00:59:28,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-18 00:59:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 270. [2021-12-18 00:59:28,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 202 states have (on average 1.301980198019802) internal successors, (263), 209 states have internal predecessors, (263), 45 states have call successors, (45), 17 states have call predecessors, (45), 22 states have return successors, (146), 43 states have call predecessors, (146), 43 states have call successors, (146) [2021-12-18 00:59:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 454 transitions. [2021-12-18 00:59:28,863 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 454 transitions. Word has length 83 [2021-12-18 00:59:28,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:28,864 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 454 transitions. [2021-12-18 00:59:28,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 10 states have call successors, (20), 4 states have call predecessors, (20), 9 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-18 00:59:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 454 transitions. [2021-12-18 00:59:28,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-18 00:59:28,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:28,866 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:28,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:29,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:29,085 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:29,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1785805137, now seen corresponding path program 1 times [2021-12-18 00:59:29,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:29,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828782210] [2021-12-18 00:59:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:29,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:29,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:29,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:29,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:29,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:29,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:59:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:29,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:59:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:29,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:59:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:29,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:59:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 00:59:29,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:29,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828782210] [2021-12-18 00:59:29,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828782210] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:29,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693966187] [2021-12-18 00:59:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:29,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:29,250 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:59:29,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 00:59:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:29,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 00:59:29,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:29,448 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:59:29,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:59:29,460 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:59:29,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:59:30,330 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0)))) is different from true [2021-12-18 00:59:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-18 00:59:30,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:59:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 00:59:30,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693966187] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:59:30,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:59:30,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 18 [2021-12-18 00:59:30,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923101263] [2021-12-18 00:59:30,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:59:30,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 00:59:30,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:30,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 00:59:30,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=228, Unknown=1, NotChecked=30, Total=306 [2021-12-18 00:59:30,608 INFO L87 Difference]: Start difference. First operand 270 states and 454 transitions. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-18 00:59:31,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:31,061 INFO L93 Difference]: Finished difference Result 664 states and 1307 transitions. [2021-12-18 00:59:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 00:59:31,062 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 85 [2021-12-18 00:59:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:31,065 INFO L225 Difference]: With dead ends: 664 [2021-12-18 00:59:31,065 INFO L226 Difference]: Without dead ends: 435 [2021-12-18 00:59:31,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=445, Unknown=1, NotChecked=44, Total=600 [2021-12-18 00:59:31,067 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 188 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:31,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 719 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 564 Invalid, 0 Unknown, 207 Unchecked, 0.3s Time] [2021-12-18 00:59:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-12-18 00:59:31,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 291. [2021-12-18 00:59:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 220 states have (on average 1.309090909090909) internal successors, (288), 227 states have internal predecessors, (288), 47 states have call successors, (47), 18 states have call predecessors, (47), 23 states have return successors, (150), 45 states have call predecessors, (150), 45 states have call successors, (150) [2021-12-18 00:59:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 485 transitions. [2021-12-18 00:59:31,092 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 485 transitions. Word has length 85 [2021-12-18 00:59:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:31,093 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 485 transitions. [2021-12-18 00:59:31,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-18 00:59:31,093 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 485 transitions. [2021-12-18 00:59:31,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-18 00:59:31,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:31,095 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:31,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:31,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-18 00:59:31,305 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:31,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:31,305 INFO L85 PathProgramCache]: Analyzing trace with hash 76025681, now seen corresponding path program 1 times [2021-12-18 00:59:31,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:31,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665138249] [2021-12-18 00:59:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:31,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:59:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 00:59:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-18 00:59:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-18 00:59:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 00:59:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-18 00:59:31,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:31,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665138249] [2021-12-18 00:59:31,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665138249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:31,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300938463] [2021-12-18 00:59:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:31,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:31,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:31,396 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:59:31,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 00:59:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 00:59:31,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 00:59:31,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:59:31,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300938463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:31,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:59:31,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-18 00:59:31,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891962116] [2021-12-18 00:59:31,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:31,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:59:31,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:31,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:59:31,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 00:59:31,619 INFO L87 Difference]: Start difference. First operand 291 states and 485 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:59:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:31,643 INFO L93 Difference]: Finished difference Result 484 states and 821 transitions. [2021-12-18 00:59:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:59:31,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2021-12-18 00:59:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:31,645 INFO L225 Difference]: With dead ends: 484 [2021-12-18 00:59:31,645 INFO L226 Difference]: Without dead ends: 277 [2021-12-18 00:59:31,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:59:31,647 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 8 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:31,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 247 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:59:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-18 00:59:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2021-12-18 00:59:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 206 states have (on average 1.2766990291262137) internal successors, (263), 213 states have internal predecessors, (263), 47 states have call successors, (47), 18 states have call predecessors, (47), 23 states have return successors, (150), 45 states have call predecessors, (150), 45 states have call successors, (150) [2021-12-18 00:59:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 460 transitions. [2021-12-18 00:59:31,660 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 460 transitions. Word has length 83 [2021-12-18 00:59:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:31,661 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 460 transitions. [2021-12-18 00:59:31,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:59:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 460 transitions. [2021-12-18 00:59:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-18 00:59:31,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:31,662 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:31,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:31,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-18 00:59:31,875 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2037600339, now seen corresponding path program 1 times [2021-12-18 00:59:31,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:31,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070960907] [2021-12-18 00:59:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:31,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:59:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:31,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 00:59:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-18 00:59:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-18 00:59:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 00:59:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-18 00:59:32,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:32,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070960907] [2021-12-18 00:59:32,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070960907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447530679] [2021-12-18 00:59:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:32,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:32,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:32,024 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:59:32,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 00:59:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 00:59:32,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 00:59:32,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:59:32,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447530679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:32,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:59:32,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-18 00:59:32,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782419941] [2021-12-18 00:59:32,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:32,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:59:32,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:59:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:59:32,271 INFO L87 Difference]: Start difference. First operand 277 states and 460 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:59:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:32,292 INFO L93 Difference]: Finished difference Result 431 states and 755 transitions. [2021-12-18 00:59:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:59:32,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2021-12-18 00:59:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:32,293 INFO L225 Difference]: With dead ends: 431 [2021-12-18 00:59:32,293 INFO L226 Difference]: Without dead ends: 180 [2021-12-18 00:59:32,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:59:32,295 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 2 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:32,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 238 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:59:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-18 00:59:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 170. [2021-12-18 00:59:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 125 states have (on average 1.216) internal successors, (152), 129 states have internal predecessors, (152), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (59), 26 states have call predecessors, (59), 26 states have call successors, (59) [2021-12-18 00:59:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 239 transitions. [2021-12-18 00:59:32,302 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 239 transitions. Word has length 83 [2021-12-18 00:59:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:32,303 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 239 transitions. [2021-12-18 00:59:32,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:59:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 239 transitions. [2021-12-18 00:59:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-18 00:59:32,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:32,304 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:32,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:32,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-18 00:59:32,519 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:32,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1237927298, now seen corresponding path program 1 times [2021-12-18 00:59:32,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:32,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054335924] [2021-12-18 00:59:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:32,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:59:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:59:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-18 00:59:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-18 00:59:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-18 00:59:32,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:32,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054335924] [2021-12-18 00:59:32,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054335924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:32,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658112734] [2021-12-18 00:59:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:32,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:32,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:32,617 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:59:32,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 00:59:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:32,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-18 00:59:32,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:32,821 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 00:59:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:32,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:59:32,894 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-18 00:59:32,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 63 [2021-12-18 00:59:32,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:32,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-12-18 00:59:32,908 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 16 treesize of output 15 [2021-12-18 00:59:32,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:32,912 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 31 treesize of output 23 [2021-12-18 00:59:32,916 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 13 treesize of output 9 [2021-12-18 00:59:34,937 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_28| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_28|) 0) 1) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_28|)) is different from true [2021-12-18 00:59:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:59:47,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:59:49,559 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_999 (Array Int Int)) (v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int))) (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_999) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1000) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1002)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)))) is different from false [2021-12-18 00:59:49,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:59:49,572 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-18 00:59:49,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:59:49,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 148 [2021-12-18 00:59:49,586 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 144 treesize of output 140 [2021-12-18 00:59:49,590 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 140 treesize of output 138 [2021-12-18 00:59:49,692 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 [2021-12-18 00:59:49,704 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 6 treesize of output 4 [2021-12-18 00:59:49,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:59:49,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 55 [2021-12-18 00:59:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 1 not checked. [2021-12-18 00:59:49,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658112734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:59:49,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:59:49,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 11] total 26 [2021-12-18 00:59:49,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394904385] [2021-12-18 00:59:49,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:59:49,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:59:49,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:49,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:59:49,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=488, Unknown=3, NotChecked=90, Total=650 [2021-12-18 00:59:49,845 INFO L87 Difference]: Start difference. First operand 170 states and 239 transitions. Second operand has 26 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-18 00:59:58,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:58,726 INFO L93 Difference]: Finished difference Result 423 states and 620 transitions. [2021-12-18 00:59:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 00:59:58,727 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 86 [2021-12-18 00:59:58,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:58,728 INFO L225 Difference]: With dead ends: 423 [2021-12-18 00:59:58,728 INFO L226 Difference]: Without dead ends: 245 [2021-12-18 00:59:58,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=167, Invalid=1244, Unknown=3, NotChecked=146, Total=1560 [2021-12-18 00:59:58,730 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 179 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 903 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:58,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1344 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 994 Invalid, 0 Unknown, 903 Unchecked, 0.6s Time] [2021-12-18 00:59:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-18 00:59:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 217. [2021-12-18 00:59:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 163 states have (on average 1.2147239263803682) internal successors, (198), 167 states have internal predecessors, (198), 35 states have call successors, (35), 16 states have call predecessors, (35), 18 states have return successors, (70), 33 states have call predecessors, (70), 33 states have call successors, (70) [2021-12-18 00:59:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 303 transitions. [2021-12-18 00:59:58,742 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 303 transitions. Word has length 86 [2021-12-18 00:59:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:58,742 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 303 transitions. [2021-12-18 00:59:58,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-18 00:59:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 303 transitions. [2021-12-18 00:59:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-18 00:59:58,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:58,743 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:58,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:58,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-18 00:59:58,959 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:58,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:58,960 INFO L85 PathProgramCache]: Analyzing trace with hash 788375522, now seen corresponding path program 1 times [2021-12-18 00:59:58,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:58,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688140793] [2021-12-18 00:59:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:58,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:59:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:59:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:59:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-18 00:59:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-18 00:59:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 00:59:59,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:59,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688140793] [2021-12-18 00:59:59,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688140793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:59,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943084060] [2021-12-18 00:59:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:59,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:59,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:59,144 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:59:59,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 00:59:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 00:59:59,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 00:59:59,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:59:59,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943084060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:59,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:59:59,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-12-18 00:59:59,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775155442] [2021-12-18 00:59:59,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:59,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:59:59,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:59:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-18 00:59:59,451 INFO L87 Difference]: Start difference. First operand 217 states and 303 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-18 00:59:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:59,584 INFO L93 Difference]: Finished difference Result 336 states and 473 transitions. [2021-12-18 00:59:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:59:59,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2021-12-18 00:59:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:59,587 INFO L225 Difference]: With dead ends: 336 [2021-12-18 00:59:59,587 INFO L226 Difference]: Without dead ends: 214 [2021-12-18 00:59:59,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-12-18 00:59:59,588 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 112 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:59,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 291 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:59:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-18 00:59:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-12-18 00:59:59,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 161 states have (on average 1.2111801242236024) internal successors, (195), 164 states have internal predecessors, (195), 35 states have call successors, (35), 16 states have call predecessors, (35), 17 states have return successors, (64), 33 states have call predecessors, (64), 33 states have call successors, (64) [2021-12-18 00:59:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 294 transitions. [2021-12-18 00:59:59,599 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 294 transitions. Word has length 86 [2021-12-18 00:59:59,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:59,600 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 294 transitions. [2021-12-18 00:59:59,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-18 00:59:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 294 transitions. [2021-12-18 00:59:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 00:59:59,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:59,601 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:59:59,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:59,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-18 00:59:59,820 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:59,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1140771738, now seen corresponding path program 1 times [2021-12-18 00:59:59,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:59,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070293707] [2021-12-18 00:59:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:59,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-18 00:59:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:59:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:59:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-18 00:59:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-18 00:59:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-18 00:59:59,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070293707] [2021-12-18 00:59:59,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070293707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590449667] [2021-12-18 00:59:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:59,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:59,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:59,948 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:59:59,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 01:00:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:00,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-18 01:00:00,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:00,209 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 01:00:00,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:00:00,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 01:00:00,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:00:00,268 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-18 01:00:00,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 32 [2021-12-18 01:00:00,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:00:00,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:00:00,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 23 [2021-12-18 01:00:00,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:00:00,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-12-18 01:00:02,339 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_38| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_38|) 0) 1) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_38|)) is different from true [2021-12-18 01:00:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 01:00:14,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:00:16,973 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1243 Int) (v_ArrVal_1241 (Array Int Int)) (v_ArrVal_1240 (Array Int Int))) (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1241) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1240) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1243)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)))) is different from false [2021-12-18 01:00:16,992 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| Int) (v_ArrVal_1239 (Array Int Int)) (v_ArrVal_1243 Int) (v_ArrVal_1241 (Array Int Int)) (v_ArrVal_1240 (Array Int Int))) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12|) (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1239))) (store (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| v_ArrVal_1241) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| v_ArrVal_1240) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1243))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|))))) is different from false [2021-12-18 01:00:17,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:00:17,010 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 39 [2021-12-18 01:00:17,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:00:17,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1778 treesize of output 1628 [2021-12-18 01:00:17,044 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 1806 treesize of output 1770 [2021-12-18 01:00:17,054 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 2186 treesize of output 2122 [2021-12-18 01:00:17,065 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 2122 treesize of output 2114 [2021-12-18 01:00:17,287 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 6 treesize of output 4 [2021-12-18 01:00:17,322 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 [2021-12-18 01:00:17,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:00:17,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 61 [2021-12-18 01:00:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 4 not checked. [2021-12-18 01:00:17,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590449667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:00:17,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:00:17,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 12] total 29 [2021-12-18 01:00:17,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542377159] [2021-12-18 01:00:17,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:00:17,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 01:00:17,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:17,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 01:00:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=578, Unknown=4, NotChecked=150, Total=812 [2021-12-18 01:00:17,473 INFO L87 Difference]: Start difference. First operand 214 states and 294 transitions. Second operand has 29 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 9 states have call successors, (25), 3 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-18 01:00:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:24,633 INFO L93 Difference]: Finished difference Result 432 states and 601 transitions. [2021-12-18 01:00:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 01:00:24,634 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 9 states have call successors, (25), 3 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 9 states have call successors, (24) Word has length 101 [2021-12-18 01:00:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:24,635 INFO L225 Difference]: With dead ends: 432 [2021-12-18 01:00:24,635 INFO L226 Difference]: Without dead ends: 271 [2021-12-18 01:00:24,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=234, Invalid=2030, Unknown=4, NotChecked=282, Total=2550 [2021-12-18 01:00:24,637 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 168 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1023 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:24,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 1401 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1041 Invalid, 0 Unknown, 1023 Unchecked, 0.6s Time] [2021-12-18 01:00:24,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-18 01:00:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 193. [2021-12-18 01:00:24,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 150 states have (on average 1.22) internal successors, (183), 151 states have internal predecessors, (183), 26 states have call successors, (26), 16 states have call predecessors, (26), 16 states have return successors, (38), 25 states have call predecessors, (38), 24 states have call successors, (38) [2021-12-18 01:00:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 247 transitions. [2021-12-18 01:00:24,648 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 247 transitions. Word has length 101 [2021-12-18 01:00:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:24,648 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 247 transitions. [2021-12-18 01:00:24,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 9 states have call successors, (25), 3 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-18 01:00:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 247 transitions. [2021-12-18 01:00:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 01:00:24,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:24,657 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:24,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:24,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-18 01:00:24,875 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:24,876 INFO L85 PathProgramCache]: Analyzing trace with hash -596272544, now seen corresponding path program 1 times [2021-12-18 01:00:24,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:24,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639371817] [2021-12-18 01:00:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:24,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:24,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:24,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:00:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:24,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:00:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:25,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:25,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:00:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:25,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:00:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:25,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:25,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:00:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:25,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:00:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-18 01:00:25,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:25,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639371817] [2021-12-18 01:00:25,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639371817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:25,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37158287] [2021-12-18 01:00:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:25,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:25,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:25,144 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:25,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 01:00:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:25,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 01:00:25,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:25,376 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:00:25,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:00:25,385 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:00:25,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:00:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 01:00:26,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:00:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 01:00:26,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37158287] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:00:26,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:00:26,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 10] total 26 [2021-12-18 01:00:26,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710326409] [2021-12-18 01:00:26,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:00:26,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 01:00:26,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:26,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 01:00:26,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-12-18 01:00:26,634 INFO L87 Difference]: Start difference. First operand 193 states and 247 transitions. Second operand has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 24 states have internal predecessors, (151), 11 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-18 01:00:26,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:26,988 INFO L93 Difference]: Finished difference Result 356 states and 450 transitions. [2021-12-18 01:00:26,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 01:00:26,988 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 24 states have internal predecessors, (151), 11 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) Word has length 100 [2021-12-18 01:00:26,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:26,990 INFO L225 Difference]: With dead ends: 356 [2021-12-18 01:00:26,990 INFO L226 Difference]: Without dead ends: 265 [2021-12-18 01:00:26,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 197 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 01:00:27,000 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 106 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:27,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1047 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 227 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2021-12-18 01:00:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-18 01:00:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 241. [2021-12-18 01:00:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 190 states have (on average 1.2157894736842105) internal successors, (231), 194 states have internal predecessors, (231), 28 states have call successors, (28), 19 states have call predecessors, (28), 22 states have return successors, (37), 27 states have call predecessors, (37), 26 states have call successors, (37) [2021-12-18 01:00:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 296 transitions. [2021-12-18 01:00:27,011 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 296 transitions. Word has length 100 [2021-12-18 01:00:27,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:27,012 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 296 transitions. [2021-12-18 01:00:27,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 24 states have internal predecessors, (151), 11 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-18 01:00:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 296 transitions. [2021-12-18 01:00:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 01:00:27,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:27,014 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-18 01:00:27,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:27,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:27,233 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:27,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:27,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1405619170, now seen corresponding path program 1 times [2021-12-18 01:00:27,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:27,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974232260] [2021-12-18 01:00:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:27,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:27,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:27,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:00:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:27,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:00:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:27,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:27,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:00:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:27,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:00:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:27,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:27,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:00:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:27,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:00:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 01:00:27,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974232260] [2021-12-18 01:00:27,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974232260] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710033618] [2021-12-18 01:00:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:27,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:27,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:27,513 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:27,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 01:00:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:27,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 01:00:27,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:27,771 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:00:27,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:00:27,789 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-18 01:00:27,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-18 01:00:27,794 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 [2021-12-18 01:00:27,799 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 [2021-12-18 01:00:27,812 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 [2021-12-18 01:00:27,843 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 15 treesize of output 11 [2021-12-18 01:00:32,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:00:32,318 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-18 01:00:32,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 25 [2021-12-18 01:00:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 01:00:32,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:00:33,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:00:33,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 242 [2021-12-18 01:00:33,240 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 298 treesize of output 282 [2021-12-18 01:00:33,245 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 102 treesize of output 94 [2021-12-18 01:00:33,252 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 138 treesize of output 126 [2021-12-18 01:00:33,258 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 126 treesize of output 110 [2021-12-18 01:00:33,264 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 110 treesize of output 102 [2021-12-18 01:00:33,395 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 62 treesize of output 54 [2021-12-18 01:00:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 01:00:33,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710033618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:00:33,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:00:33,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 15] total 40 [2021-12-18 01:00:33,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753593171] [2021-12-18 01:00:33,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:00:33,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 01:00:33,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:33,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 01:00:33,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1406, Unknown=2, NotChecked=0, Total=1560 [2021-12-18 01:00:33,500 INFO L87 Difference]: Start difference. First operand 241 states and 296 transitions. Second operand has 40 states, 40 states have (on average 4.075) internal successors, (163), 37 states have internal predecessors, (163), 14 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (22), 11 states have call predecessors, (22), 13 states have call successors, (22) [2021-12-18 01:00:40,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:40,146 INFO L93 Difference]: Finished difference Result 378 states and 469 transitions. [2021-12-18 01:00:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 01:00:40,150 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.075) internal successors, (163), 37 states have internal predecessors, (163), 14 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (22), 11 states have call predecessors, (22), 13 states have call successors, (22) Word has length 100 [2021-12-18 01:00:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:40,151 INFO L225 Difference]: With dead ends: 378 [2021-12-18 01:00:40,151 INFO L226 Difference]: Without dead ends: 283 [2021-12-18 01:00:40,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=356, Invalid=3179, Unknown=5, NotChecked=0, Total=3540 [2021-12-18 01:00:40,153 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 195 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:40,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1372 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 390 Invalid, 0 Unknown, 189 Unchecked, 0.2s Time] [2021-12-18 01:00:40,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-18 01:00:40,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 266. [2021-12-18 01:00:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 211 states have (on average 1.2180094786729858) internal successors, (257), 215 states have internal predecessors, (257), 30 states have call successors, (30), 21 states have call predecessors, (30), 24 states have return successors, (37), 29 states have call predecessors, (37), 28 states have call successors, (37) [2021-12-18 01:00:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2021-12-18 01:00:40,166 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 100 [2021-12-18 01:00:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:40,166 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2021-12-18 01:00:40,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.075) internal successors, (163), 37 states have internal predecessors, (163), 14 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (22), 11 states have call predecessors, (22), 13 states have call successors, (22) [2021-12-18 01:00:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2021-12-18 01:00:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 01:00:40,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:40,170 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:40,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:40,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-18 01:00:40,375 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:40,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:40,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1798646180, now seen corresponding path program 1 times [2021-12-18 01:00:40,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:40,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889664397] [2021-12-18 01:00:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:40,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:40,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:40,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:00:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:40,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:00:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:40,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:40,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:00:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:40,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:00:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:40,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:40,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:00:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:40,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:00:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-18 01:00:40,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:40,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889664397] [2021-12-18 01:00:40,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889664397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:40,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341580155] [2021-12-18 01:00:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:40,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:40,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:40,776 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:40,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 01:00:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 01:00:40,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:41,034 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:00:41,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:00:41,047 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:00:41,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:00:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 01:00:41,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:00:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 01:00:42,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341580155] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:00:42,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:00:42,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 12] total 34 [2021-12-18 01:00:42,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721859017] [2021-12-18 01:00:42,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:00:42,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 01:00:42,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:42,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 01:00:42,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 01:00:42,413 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 32 states have internal predecessors, (155), 11 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-18 01:00:42,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:42,851 INFO L93 Difference]: Finished difference Result 371 states and 457 transitions. [2021-12-18 01:00:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 01:00:42,852 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 32 states have internal predecessors, (155), 11 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) Word has length 100 [2021-12-18 01:00:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:42,855 INFO L225 Difference]: With dead ends: 371 [2021-12-18 01:00:42,855 INFO L226 Difference]: Without dead ends: 280 [2021-12-18 01:00:42,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 193 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 01:00:42,856 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 172 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:42,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1135 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 261 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2021-12-18 01:00:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-18 01:00:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 266. [2021-12-18 01:00:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 211 states have (on average 1.2132701421800949) internal successors, (256), 215 states have internal predecessors, (256), 30 states have call successors, (30), 21 states have call predecessors, (30), 24 states have return successors, (37), 29 states have call predecessors, (37), 28 states have call successors, (37) [2021-12-18 01:00:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 323 transitions. [2021-12-18 01:00:42,869 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 323 transitions. Word has length 100 [2021-12-18 01:00:42,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:42,870 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 323 transitions. [2021-12-18 01:00:42,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 32 states have internal predecessors, (155), 11 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-18 01:00:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 323 transitions. [2021-12-18 01:00:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 01:00:42,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:42,871 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:42,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:43,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-18 01:00:43,087 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:43,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:43,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1540480742, now seen corresponding path program 1 times [2021-12-18 01:00:43,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:43,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169130007] [2021-12-18 01:00:43,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:43,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:43,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:43,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:00:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:43,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:00:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:43,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:43,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:00:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:43,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:00:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:43,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:43,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:00:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:43,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:00:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-18 01:00:43,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:43,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169130007] [2021-12-18 01:00:43,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169130007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:43,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465622363] [2021-12-18 01:00:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:43,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:43,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:43,288 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:43,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 01:00:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:43,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 01:00:43,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:43,544 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:00:43,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:00:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 01:00:44,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:00:44,899 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 236 treesize of output 220 [2021-12-18 01:00:44,902 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 220 treesize of output 204 [2021-12-18 01:00:44,904 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 204 treesize of output 196 [2021-12-18 01:00:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 01:00:45,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465622363] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:00:45,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:00:45,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 16] total 35 [2021-12-18 01:00:45,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124470781] [2021-12-18 01:00:45,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:00:45,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 01:00:45,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 01:00:45,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 01:00:45,117 INFO L87 Difference]: Start difference. First operand 266 states and 323 transitions. Second operand has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 33 states have internal predecessors, (148), 15 states have call successors, (23), 3 states have call predecessors, (23), 7 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2021-12-18 01:00:46,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:46,356 INFO L93 Difference]: Finished difference Result 569 states and 702 transitions. [2021-12-18 01:00:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 01:00:46,357 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 33 states have internal predecessors, (148), 15 states have call successors, (23), 3 states have call predecessors, (23), 7 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) Word has length 100 [2021-12-18 01:00:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:46,358 INFO L225 Difference]: With dead ends: 569 [2021-12-18 01:00:46,358 INFO L226 Difference]: Without dead ends: 500 [2021-12-18 01:00:46,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 201 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=398, Invalid=3508, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 01:00:46,361 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 566 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:46,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 1679 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1099 Invalid, 0 Unknown, 224 Unchecked, 0.6s Time] [2021-12-18 01:00:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-12-18 01:00:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 396. [2021-12-18 01:00:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 316 states have (on average 1.2246835443037976) internal successors, (387), 323 states have internal predecessors, (387), 43 states have call successors, (43), 30 states have call predecessors, (43), 36 states have return successors, (54), 42 states have call predecessors, (54), 40 states have call successors, (54) [2021-12-18 01:00:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 484 transitions. [2021-12-18 01:00:46,400 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 484 transitions. Word has length 100 [2021-12-18 01:00:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:46,401 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 484 transitions. [2021-12-18 01:00:46,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 33 states have internal predecessors, (148), 15 states have call successors, (23), 3 states have call predecessors, (23), 7 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2021-12-18 01:00:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 484 transitions. [2021-12-18 01:00:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 01:00:46,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:46,402 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:46,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:46,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 01:00:46,612 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:46,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1743369304, now seen corresponding path program 1 times [2021-12-18 01:00:46,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:46,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334872689] [2021-12-18 01:00:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:46,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:46,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:46,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:00:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:46,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:00:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:46,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:46,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:00:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:46,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:00:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:46,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:46,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:00:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:46,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:00:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 01:00:46,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:46,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334872689] [2021-12-18 01:00:46,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334872689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:46,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807579979] [2021-12-18 01:00:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:46,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:46,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:46,758 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:46,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 01:00:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:46,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 01:00:46,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-18 01:00:47,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:00:47,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807579979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:00:47,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:00:47,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-12-18 01:00:47,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468246628] [2021-12-18 01:00:47,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:00:47,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 01:00:47,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 01:00:47,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-18 01:00:47,119 INFO L87 Difference]: Start difference. First operand 396 states and 484 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 01:00:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:47,239 INFO L93 Difference]: Finished difference Result 843 states and 1056 transitions. [2021-12-18 01:00:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 01:00:47,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 100 [2021-12-18 01:00:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:47,247 INFO L225 Difference]: With dead ends: 843 [2021-12-18 01:00:47,247 INFO L226 Difference]: Without dead ends: 362 [2021-12-18 01:00:47,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-18 01:00:47,249 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 126 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:47,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 271 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 01:00:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-18 01:00:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 358. [2021-12-18 01:00:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 281 states have (on average 1.209964412811388) internal successors, (340), 287 states have internal predecessors, (340), 43 states have call successors, (43), 28 states have call predecessors, (43), 33 states have return successors, (51), 42 states have call predecessors, (51), 40 states have call successors, (51) [2021-12-18 01:00:47,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 434 transitions. [2021-12-18 01:00:47,271 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 434 transitions. Word has length 100 [2021-12-18 01:00:47,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:47,271 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 434 transitions. [2021-12-18 01:00:47,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 01:00:47,271 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 434 transitions. [2021-12-18 01:00:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-18 01:00:47,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:47,272 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:47,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:47,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:47,479 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1063573994, now seen corresponding path program 1 times [2021-12-18 01:00:47,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:47,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050292889] [2021-12-18 01:00:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:47,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:00:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:00:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:00:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:00:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:00:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:00:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 01:00:47,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:47,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050292889] [2021-12-18 01:00:47,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050292889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:47,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231284121] [2021-12-18 01:00:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:47,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:47,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:47,902 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:47,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 01:00:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:48,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 167 conjunts are in the unsatisfiable core [2021-12-18 01:00:48,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:48,217 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 9 treesize of output 8 [2021-12-18 01:00:48,219 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 [2021-12-18 01:00:48,222 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-18 01:00:48,224 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 6 treesize of output 5 [2021-12-18 01:00:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 01:00:50,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:01:02,158 WARN L227 SmtUtils]: Spent 10.21s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:01:19,661 WARN L227 SmtUtils]: Spent 10.40s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:01:20,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:01:20,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 3546 treesize of output 3242 [2021-12-18 01:01:20,796 INFO L354 Elim1Store]: treesize reduction 23, result has 86.1 percent of original size [2021-12-18 01:01:20,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 41547 treesize of output 38274 [2021-12-18 01:01:21,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:01:21,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38181 treesize of output 36395 [2021-12-18 01:01:21,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:01:21,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 39560 treesize of output 39210 [2021-12-18 01:01:21,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:01:21,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 49301 treesize of output 47076 [2021-12-18 01:01:23,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:01:23,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 43629 treesize of output 43500 [2021-12-18 01:01:24,568 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-18 01:01:24,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:01:24,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-18 01:01:24,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040603478] [2021-12-18 01:01:24,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 01:01:24,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 01:01:24,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:01:24,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 01:01:24,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=3281, Unknown=0, NotChecked=0, Total=3540 [2021-12-18 01:01:24,573 INFO L87 Difference]: Start difference. First operand 358 states and 434 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 16 states have internal predecessors, (70), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-18 01:01:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:01:25,550 INFO L93 Difference]: Finished difference Result 567 states and 717 transitions. [2021-12-18 01:01:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 01:01:25,550 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 16 states have internal predecessors, (70), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 113 [2021-12-18 01:01:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:01:25,552 INFO L225 Difference]: With dead ends: 567 [2021-12-18 01:01:25,552 INFO L226 Difference]: Without dead ends: 444 [2021-12-18 01:01:25,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=376, Invalid=4594, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 01:01:25,554 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 123 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 01:01:25,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 836 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 01:01:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-12-18 01:01:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 380. [2021-12-18 01:01:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 297 states have (on average 1.2053872053872055) internal successors, (358), 305 states have internal predecessors, (358), 43 states have call successors, (43), 28 states have call predecessors, (43), 39 states have return successors, (61), 46 states have call predecessors, (61), 40 states have call successors, (61) [2021-12-18 01:01:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 462 transitions. [2021-12-18 01:01:25,582 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 462 transitions. Word has length 113 [2021-12-18 01:01:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:01:25,582 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 462 transitions. [2021-12-18 01:01:25,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 16 states have internal predecessors, (70), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-18 01:01:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 462 transitions. [2021-12-18 01:01:25,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-18 01:01:25,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:01:25,584 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:01:25,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-18 01:01:25,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:25,799 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:01:25,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:01:25,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1321739432, now seen corresponding path program 1 times [2021-12-18 01:01:25,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:01:25,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238733820] [2021-12-18 01:01:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:25,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:01:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:25,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:01:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:25,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:01:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:25,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:01:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:25,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:25,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:01:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:25,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:01:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:25,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:25,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:01:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:25,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:01:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:26,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 01:01:26,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:01:26,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238733820] [2021-12-18 01:01:26,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238733820] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:01:26,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258761602] [2021-12-18 01:01:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:26,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:26,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:01:26,088 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:01:26,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 01:01:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:26,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-18 01:01:26,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:01:26,341 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:01:26,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:01:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 57 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 01:01:27,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:01:27,869 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 121 treesize of output 113 [2021-12-18 01:01:27,871 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 113 treesize of output 105 [2021-12-18 01:01:27,872 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 105 treesize of output 101 [2021-12-18 01:01:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 01:01:27,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258761602] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:01:27,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:01:27,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 19] total 43 [2021-12-18 01:01:27,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613702806] [2021-12-18 01:01:27,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:01:27,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 01:01:27,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:01:27,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 01:01:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1645, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 01:01:27,937 INFO L87 Difference]: Start difference. First operand 380 states and 462 transitions. Second operand has 43 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 41 states have internal predecessors, (171), 17 states have call successors, (25), 3 states have call predecessors, (25), 9 states have return successors, (25), 15 states have call predecessors, (25), 16 states have call successors, (25) [2021-12-18 01:01:30,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:01:30,187 INFO L93 Difference]: Finished difference Result 1213 states and 1733 transitions. [2021-12-18 01:01:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-18 01:01:30,187 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 41 states have internal predecessors, (171), 17 states have call successors, (25), 3 states have call predecessors, (25), 9 states have return successors, (25), 15 states have call predecessors, (25), 16 states have call successors, (25) Word has length 113 [2021-12-18 01:01:30,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:01:30,196 INFO L225 Difference]: With dead ends: 1213 [2021-12-18 01:01:30,196 INFO L226 Difference]: Without dead ends: 921 [2021-12-18 01:01:30,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 222 SyntacticMatches, 15 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=664, Invalid=5498, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 01:01:30,199 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 278 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 2751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 428 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 01:01:30,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 2155 Invalid, 2751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2185 Invalid, 0 Unknown, 428 Unchecked, 1.3s Time] [2021-12-18 01:01:30,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-12-18 01:01:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 534. [2021-12-18 01:01:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 411 states have (on average 1.218978102189781) internal successors, (501), 425 states have internal predecessors, (501), 68 states have call successors, (68), 32 states have call predecessors, (68), 54 states have return successors, (123), 76 states have call predecessors, (123), 65 states have call successors, (123) [2021-12-18 01:01:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 692 transitions. [2021-12-18 01:01:30,249 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 692 transitions. Word has length 113 [2021-12-18 01:01:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:01:30,250 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 692 transitions. [2021-12-18 01:01:30,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 41 states have internal predecessors, (171), 17 states have call successors, (25), 3 states have call predecessors, (25), 9 states have return successors, (25), 15 states have call predecessors, (25), 16 states have call successors, (25) [2021-12-18 01:01:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 692 transitions. [2021-12-18 01:01:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-18 01:01:30,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:01:30,251 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:01:30,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 01:01:30,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-18 01:01:30,459 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:01:30,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:01:30,460 INFO L85 PathProgramCache]: Analyzing trace with hash 310622182, now seen corresponding path program 1 times [2021-12-18 01:01:30,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:01:30,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063032273] [2021-12-18 01:01:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:30,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:01:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:30,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:01:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:30,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:01:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:30,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:01:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:30,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:30,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:01:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:30,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:01:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:30,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:30,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:01:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:30,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:01:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:30,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 01:01:30,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:01:30,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063032273] [2021-12-18 01:01:30,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063032273] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:01:30,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807508409] [2021-12-18 01:01:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:30,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:30,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:01:30,647 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:01:30,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 01:01:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 01:01:30,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:01:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-18 01:01:31,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:01:31,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807508409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:01:31,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:01:31,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 23 [2021-12-18 01:01:31,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896658301] [2021-12-18 01:01:31,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:01:31,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 01:01:31,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:01:31,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 01:01:31,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-12-18 01:01:31,066 INFO L87 Difference]: Start difference. First operand 534 states and 692 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-18 01:01:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:01:31,350 INFO L93 Difference]: Finished difference Result 1132 states and 1530 transitions. [2021-12-18 01:01:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 01:01:31,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 113 [2021-12-18 01:01:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:01:31,354 INFO L225 Difference]: With dead ends: 1132 [2021-12-18 01:01:31,354 INFO L226 Difference]: Without dead ends: 581 [2021-12-18 01:01:31,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-12-18 01:01:31,356 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 141 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:01:31,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 476 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 01:01:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-12-18 01:01:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 515. [2021-12-18 01:01:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 396 states have (on average 1.2121212121212122) internal successors, (480), 411 states have internal predecessors, (480), 68 states have call successors, (68), 32 states have call predecessors, (68), 50 states have return successors, (107), 71 states have call predecessors, (107), 65 states have call successors, (107) [2021-12-18 01:01:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 655 transitions. [2021-12-18 01:01:31,396 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 655 transitions. Word has length 113 [2021-12-18 01:01:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:01:31,396 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 655 transitions. [2021-12-18 01:01:31,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-18 01:01:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 655 transitions. [2021-12-18 01:01:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 01:01:31,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:01:31,397 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:01:31,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 01:01:31,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-18 01:01:31,611 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:01:31,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:01:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1777957958, now seen corresponding path program 1 times [2021-12-18 01:01:31,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:01:31,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733426413] [2021-12-18 01:01:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:31,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:01:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:01:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:01:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:01:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:01:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:01:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:01:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:01:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-18 01:01:31,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:01:31,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733426413] [2021-12-18 01:01:31,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733426413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:01:31,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 01:01:31,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 01:01:31,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695508711] [2021-12-18 01:01:31,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:01:31,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 01:01:31,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:01:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 01:01:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-18 01:01:31,759 INFO L87 Difference]: Start difference. First operand 515 states and 655 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-18 01:01:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:01:31,830 INFO L93 Difference]: Finished difference Result 563 states and 717 transitions. [2021-12-18 01:01:31,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 01:01:31,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 116 [2021-12-18 01:01:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:01:31,832 INFO L225 Difference]: With dead ends: 563 [2021-12-18 01:01:31,833 INFO L226 Difference]: Without dead ends: 561 [2021-12-18 01:01:31,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-18 01:01:31,833 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 10 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 01:01:31,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 535 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 01:01:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-12-18 01:01:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 540. [2021-12-18 01:01:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 411 states have (on average 1.2043795620437956) internal successors, (495), 428 states have internal predecessors, (495), 73 states have call successors, (73), 35 states have call predecessors, (73), 55 states have return successors, (121), 76 states have call predecessors, (121), 70 states have call successors, (121) [2021-12-18 01:01:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 689 transitions. [2021-12-18 01:01:31,865 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 689 transitions. Word has length 116 [2021-12-18 01:01:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:01:31,865 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 689 transitions. [2021-12-18 01:01:31,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-18 01:01:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 689 transitions. [2021-12-18 01:01:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-18 01:01:31,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:01:31,867 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-12-18 01:01:31,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-18 01:01:31,867 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:01:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:01:31,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1385375383, now seen corresponding path program 1 times [2021-12-18 01:01:31,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:01:31,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053859848] [2021-12-18 01:01:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:31,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:01:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:01:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:01:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:01:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:31,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:01:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:32,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 01:01:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:32,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-18 01:01:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:32,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:32,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 01:01:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:32,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 01:01:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-18 01:01:32,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:01:32,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053859848] [2021-12-18 01:01:32,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053859848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:01:32,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012092448] [2021-12-18 01:01:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:32,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:32,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:01:32,042 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:01:32,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 01:01:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:32,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 01:01:32,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:01:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-18 01:01:32,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:01:32,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012092448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:01:32,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:01:32,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-12-18 01:01:32,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474328002] [2021-12-18 01:01:32,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:01:32,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 01:01:32,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:01:32,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 01:01:32,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-18 01:01:32,486 INFO L87 Difference]: Start difference. First operand 540 states and 689 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-18 01:01:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:01:32,664 INFO L93 Difference]: Finished difference Result 959 states and 1255 transitions. [2021-12-18 01:01:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 01:01:32,664 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 110 [2021-12-18 01:01:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:01:32,666 INFO L225 Difference]: With dead ends: 959 [2021-12-18 01:01:32,666 INFO L226 Difference]: Without dead ends: 595 [2021-12-18 01:01:32,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-18 01:01:32,668 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 17 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 01:01:32,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 461 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2021-12-18 01:01:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-18 01:01:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 567. [2021-12-18 01:01:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 432 states have (on average 1.2037037037037037) internal successors, (520), 449 states have internal predecessors, (520), 73 states have call successors, (73), 35 states have call predecessors, (73), 61 states have return successors, (133), 82 states have call predecessors, (133), 70 states have call successors, (133) [2021-12-18 01:01:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 726 transitions. [2021-12-18 01:01:32,701 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 726 transitions. Word has length 110 [2021-12-18 01:01:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:01:32,702 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 726 transitions. [2021-12-18 01:01:32,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-18 01:01:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 726 transitions. [2021-12-18 01:01:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-18 01:01:32,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:01:32,704 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:01:32,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 01:01:32,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:32,922 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:01:32,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:01:32,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1834628581, now seen corresponding path program 1 times [2021-12-18 01:01:32,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:01:32,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484967792] [2021-12-18 01:01:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:32,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:01:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:32,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:01:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:32,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:01:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:32,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 01:01:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:33,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:33,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:01:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:33,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-18 01:01:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:33,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 01:01:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:33,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:33,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-18 01:01:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:33,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-18 01:01:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 01:01:33,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:01:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484967792] [2021-12-18 01:01:33,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484967792] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:01:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310881768] [2021-12-18 01:01:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:33,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:01:33,214 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:01:33,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 01:01:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:33,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-18 01:01:33,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:01:33,484 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:01:33,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:01:33,495 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:01:33,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:01:35,661 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_27| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_26| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_27|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_26|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_26| 16)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_27| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_26| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_27|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_26|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_27|)))) is different from true [2021-12-18 01:01:37,775 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_89| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_89|) 0) 16))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_89| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_89|) 0) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_89|)))) is different from true [2021-12-18 01:01:41,891 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_48| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_48|) 0) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_48|))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_48| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_48|) 0) 16)))) is different from true [2021-12-18 01:01:51,956 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:02:06,088 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:02:16,176 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:02:24,282 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:02:34,404 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:02:42,491 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:02:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 64 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2021-12-18 01:02:42,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:02:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-18 01:02:45,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310881768] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:02:45,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:02:45,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 14] total 43 [2021-12-18 01:02:45,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521562378] [2021-12-18 01:02:45,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:02:45,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 01:02:45,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:02:45,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 01:02:45,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1418, Unknown=10, NotChecked=234, Total=1806 [2021-12-18 01:02:45,431 INFO L87 Difference]: Start difference. First operand 567 states and 726 transitions. Second operand has 43 states, 40 states have (on average 4.65) internal successors, (186), 39 states have internal predecessors, (186), 17 states have call successors, (29), 5 states have call predecessors, (29), 11 states have return successors, (30), 15 states have call predecessors, (30), 17 states have call successors, (30) [2021-12-18 01:03:37,868 WARN L227 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:03:49,905 WARN L227 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:04:02,153 WARN L860 $PredicateComparison]: unable to prove that (and (or (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_48| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_48|) 0) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_48|))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_48| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_48|) 0) 16)))) (or (not (= (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|) |c_aws_linked_list_is_valid_#in~list#1.base|)) (not (= (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|) (+ |c_aws_linked_list_is_valid_#in~list#1.offset| 16))))) is different from true [2021-12-18 01:04:14,290 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:04:24,355 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:04:46,423 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:04:58,477 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:05:06,557 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:06:12,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:06:12,362 INFO L93 Difference]: Finished difference Result 1236 states and 1627 transitions. [2021-12-18 01:06:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-18 01:06:12,363 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 4.65) internal successors, (186), 39 states have internal predecessors, (186), 17 states have call successors, (29), 5 states have call predecessors, (29), 11 states have return successors, (30), 15 states have call predecessors, (30), 17 states have call successors, (30) Word has length 112 [2021-12-18 01:06:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:06:12,366 INFO L225 Difference]: With dead ends: 1236 [2021-12-18 01:06:12,366 INFO L226 Difference]: Without dead ends: 686 [2021-12-18 01:06:12,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 235 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 276.7s TimeCoverageRelationStatistics Valid=691, Invalid=6215, Unknown=82, NotChecked=668, Total=7656 [2021-12-18 01:06:12,369 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 343 mSDsluCounter, 2259 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1466 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:06:12,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 2415 Invalid, 3828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2118 Invalid, 0 Unknown, 1466 Unchecked, 1.2s Time] [2021-12-18 01:06:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-12-18 01:06:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 557. [2021-12-18 01:06:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 442 states have (on average 1.16289592760181) internal successors, (514), 451 states have internal predecessors, (514), 55 states have call successors, (55), 39 states have call predecessors, (55), 59 states have return successors, (83), 66 states have call predecessors, (83), 52 states have call successors, (83) [2021-12-18 01:06:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 652 transitions. [2021-12-18 01:06:12,403 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 652 transitions. Word has length 112 [2021-12-18 01:06:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:06:12,404 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 652 transitions. [2021-12-18 01:06:12,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 4.65) internal successors, (186), 39 states have internal predecessors, (186), 17 states have call successors, (29), 5 states have call predecessors, (29), 11 states have return successors, (30), 15 states have call predecessors, (30), 17 states have call successors, (30) [2021-12-18 01:06:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 652 transitions. [2021-12-18 01:06:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-18 01:06:12,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:06:12,405 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:06:12,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 01:06:12,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:06:12,624 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:06:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:06:12,624 INFO L85 PathProgramCache]: Analyzing trace with hash -534895428, now seen corresponding path program 2 times [2021-12-18 01:06:12,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:06:12,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576118309] [2021-12-18 01:06:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:06:12,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:06:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:06:12,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:06:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:06:12,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:06:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:06:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:06:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:06:12,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:06:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:06:12,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:06:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:06:12,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:06:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:06:12,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:06:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:06:12,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:06:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:06:12,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:06:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:06:12,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:06:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:06:12,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:06:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:06:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-18 01:06:13,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:06:13,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576118309] [2021-12-18 01:06:13,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576118309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:06:13,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110577485] [2021-12-18 01:06:13,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 01:06:13,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:06:13,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:06:13,103 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:06:13,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 01:06:13,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 01:06:13,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 01:06:13,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-18 01:06:13,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:06:13,420 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:06:13,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:06:13,429 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:06:13,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:06:15,261 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 44 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 01:06:15,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:06:29,795 WARN L227 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:06:43,914 WARN L227 SmtUtils]: Spent 14.03s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:06:58,007 WARN L227 SmtUtils]: Spent 14.02s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:07:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 52 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 01:07:05,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110577485] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:07:05,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:07:05,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 19] total 57 [2021-12-18 01:07:05,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110543350] [2021-12-18 01:07:05,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:07:05,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 01:07:05,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:07:05,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 01:07:05,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2963, Unknown=1, NotChecked=0, Total=3192 [2021-12-18 01:07:05,477 INFO L87 Difference]: Start difference. First operand 557 states and 652 transitions. Second operand has 57 states, 57 states have (on average 3.473684210526316) internal successors, (198), 54 states have internal predecessors, (198), 22 states have call successors, (33), 4 states have call predecessors, (33), 12 states have return successors, (32), 20 states have call predecessors, (32), 21 states have call successors, (32) [2021-12-18 01:07:10,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:07:10,688 INFO L93 Difference]: Finished difference Result 862 states and 1072 transitions. [2021-12-18 01:07:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-18 01:07:10,688 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.473684210526316) internal successors, (198), 54 states have internal predecessors, (198), 22 states have call successors, (33), 4 states have call predecessors, (33), 12 states have return successors, (32), 20 states have call predecessors, (32), 21 states have call successors, (32) Word has length 124 [2021-12-18 01:07:10,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:07:10,691 INFO L225 Difference]: With dead ends: 862 [2021-12-18 01:07:10,691 INFO L226 Difference]: Without dead ends: 786 [2021-12-18 01:07:10,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 236 SyntacticMatches, 17 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 54.4s TimeCoverageRelationStatistics Valid=644, Invalid=7010, Unknown=2, NotChecked=0, Total=7656 [2021-12-18 01:07:10,693 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 344 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 638 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 01:07:10,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 1730 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1435 Invalid, 0 Unknown, 638 Unchecked, 1.1s Time] [2021-12-18 01:07:10,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-12-18 01:07:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 597. [2021-12-18 01:07:10,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 472 states have (on average 1.1694915254237288) internal successors, (552), 487 states have internal predecessors, (552), 59 states have call successors, (59), 41 states have call predecessors, (59), 65 states have return successors, (95), 68 states have call predecessors, (95), 56 states have call successors, (95) [2021-12-18 01:07:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 706 transitions. [2021-12-18 01:07:10,733 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 706 transitions. Word has length 124 [2021-12-18 01:07:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:07:10,733 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 706 transitions. [2021-12-18 01:07:10,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.473684210526316) internal successors, (198), 54 states have internal predecessors, (198), 22 states have call successors, (33), 4 states have call predecessors, (33), 12 states have return successors, (32), 20 states have call predecessors, (32), 21 states have call successors, (32) [2021-12-18 01:07:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 706 transitions. [2021-12-18 01:07:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-18 01:07:10,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:07:10,735 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:07:10,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 01:07:10,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-18 01:07:10,953 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:07:10,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:07:10,953 INFO L85 PathProgramCache]: Analyzing trace with hash -276729990, now seen corresponding path program 2 times [2021-12-18 01:07:10,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:07:10,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421983441] [2021-12-18 01:07:10,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:07:10,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:07:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:11,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:07:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:11,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:07:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:11,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:07:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:11,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:11,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:07:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:11,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:07:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:11,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:11,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:07:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:11,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:07:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:11,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:11,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:07:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-18 01:07:11,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:07:11,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421983441] [2021-12-18 01:07:11,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421983441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:07:11,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405346158] [2021-12-18 01:07:11,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 01:07:11,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:07:11,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:07:11,344 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:07:11,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 01:07:11,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 01:07:11,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 01:07:11,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-18 01:07:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:07:11,635 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:07:11,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:07:11,647 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:07:11,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:07:36,521 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:07:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 01:07:36,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:07:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 51 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-18 01:07:37,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405346158] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:07:37,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:07:37,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 14] total 40 [2021-12-18 01:07:37,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535894070] [2021-12-18 01:07:37,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:07:37,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 01:07:37,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:07:37,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 01:07:37,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1372, Unknown=7, NotChecked=0, Total=1560 [2021-12-18 01:07:37,585 INFO L87 Difference]: Start difference. First operand 597 states and 706 transitions. Second operand has 40 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 38 states have internal predecessors, (183), 19 states have call successors, (32), 4 states have call predecessors, (32), 8 states have return successors, (32), 18 states have call predecessors, (32), 18 states have call successors, (32) [2021-12-18 01:07:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:07:54,706 INFO L93 Difference]: Finished difference Result 750 states and 904 transitions. [2021-12-18 01:07:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 01:07:54,706 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 38 states have internal predecessors, (183), 19 states have call successors, (32), 4 states have call predecessors, (32), 8 states have return successors, (32), 18 states have call predecessors, (32), 18 states have call successors, (32) Word has length 124 [2021-12-18 01:07:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:07:54,708 INFO L225 Difference]: With dead ends: 750 [2021-12-18 01:07:54,708 INFO L226 Difference]: Without dead ends: 644 [2021-12-18 01:07:54,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 243 SyntacticMatches, 15 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=401, Invalid=2665, Unknown=14, NotChecked=0, Total=3080 [2021-12-18 01:07:54,709 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 201 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1923 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 01:07:54,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1923 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1101 Invalid, 0 Unknown, 384 Unchecked, 0.6s Time] [2021-12-18 01:07:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-12-18 01:07:54,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 542. [2021-12-18 01:07:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 430 states have (on average 1.1372093023255814) internal successors, (489), 439 states have internal predecessors, (489), 55 states have call successors, (55), 38 states have call predecessors, (55), 56 states have return successors, (79), 64 states have call predecessors, (79), 52 states have call successors, (79) [2021-12-18 01:07:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 623 transitions. [2021-12-18 01:07:54,745 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 623 transitions. Word has length 124 [2021-12-18 01:07:54,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:07:54,745 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 623 transitions. [2021-12-18 01:07:54,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 38 states have internal predecessors, (183), 19 states have call successors, (32), 4 states have call predecessors, (32), 8 states have return successors, (32), 18 states have call predecessors, (32), 18 states have call successors, (32) [2021-12-18 01:07:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 623 transitions. [2021-12-18 01:07:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-18 01:07:54,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:07:54,747 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:07:54,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-18 01:07:54,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-18 01:07:54,952 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:07:54,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:07:54,952 INFO L85 PathProgramCache]: Analyzing trace with hash -113653625, now seen corresponding path program 1 times [2021-12-18 01:07:54,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:07:54,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114872291] [2021-12-18 01:07:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:07:54,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:07:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:07:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:07:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:07:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:07:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:07:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:07:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:07:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:07:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-18 01:07:55,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:07:55,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114872291] [2021-12-18 01:07:55,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114872291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:07:55,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920049962] [2021-12-18 01:07:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:07:55,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:07:55,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:07:55,181 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:07:55,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 01:07:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 01:07:55,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:07:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-18 01:07:55,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:07:55,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920049962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:07:55,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:07:55,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 12 [2021-12-18 01:07:55,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474997255] [2021-12-18 01:07:55,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:07:55,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 01:07:55,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:07:55,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 01:07:55,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-18 01:07:55,507 INFO L87 Difference]: Start difference. First operand 542 states and 623 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-18 01:07:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:07:55,544 INFO L93 Difference]: Finished difference Result 892 states and 1046 transitions. [2021-12-18 01:07:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 01:07:55,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 126 [2021-12-18 01:07:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:07:55,545 INFO L225 Difference]: With dead ends: 892 [2021-12-18 01:07:55,545 INFO L226 Difference]: Without dead ends: 448 [2021-12-18 01:07:55,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-18 01:07:55,547 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 2 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 01:07:55,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 231 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 01:07:55,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-18 01:07:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 447. [2021-12-18 01:07:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 352 states have (on average 1.1136363636363635) internal successors, (392), 361 states have internal predecessors, (392), 50 states have call successors, (50), 34 states have call predecessors, (50), 44 states have return successors, (62), 51 states have call predecessors, (62), 47 states have call successors, (62) [2021-12-18 01:07:55,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 504 transitions. [2021-12-18 01:07:55,573 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 504 transitions. Word has length 126 [2021-12-18 01:07:55,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:07:55,574 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 504 transitions. [2021-12-18 01:07:55,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-18 01:07:55,574 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 504 transitions. [2021-12-18 01:07:55,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-18 01:07:55,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:07:55,575 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:07:55,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 01:07:55,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 01:07:55,793 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:07:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:07:55,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2001559418, now seen corresponding path program 1 times [2021-12-18 01:07:55,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:07:55,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385975135] [2021-12-18 01:07:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:07:55,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:07:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:07:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:07:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:07:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:07:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:07:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:07:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:07:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 01:07:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-18 01:07:55,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:07:55,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385975135] [2021-12-18 01:07:55,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385975135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:07:55,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 01:07:55,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 01:07:55,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174396900] [2021-12-18 01:07:55,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:07:55,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 01:07:55,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:07:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 01:07:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 01:07:55,922 INFO L87 Difference]: Start difference. First operand 447 states and 504 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-18 01:07:56,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:07:56,002 INFO L93 Difference]: Finished difference Result 461 states and 517 transitions. [2021-12-18 01:07:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 01:07:56,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 122 [2021-12-18 01:07:56,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:07:56,004 INFO L225 Difference]: With dead ends: 461 [2021-12-18 01:07:56,004 INFO L226 Difference]: Without dead ends: 459 [2021-12-18 01:07:56,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-18 01:07:56,005 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 8 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 01:07:56,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 345 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 01:07:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-18 01:07:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2021-12-18 01:07:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 361 states have (on average 1.110803324099723) internal successors, (401), 370 states have internal predecessors, (401), 50 states have call successors, (50), 37 states have call predecessors, (50), 47 states have return successors, (62), 51 states have call predecessors, (62), 47 states have call successors, (62) [2021-12-18 01:07:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 513 transitions. [2021-12-18 01:07:56,031 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 513 transitions. Word has length 122 [2021-12-18 01:07:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:07:56,032 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 513 transitions. [2021-12-18 01:07:56,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-18 01:07:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 513 transitions. [2021-12-18 01:07:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-18 01:07:56,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:07:56,033 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:07:56,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-18 01:07:56,033 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:07:56,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:07:56,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1469209361, now seen corresponding path program 1 times [2021-12-18 01:07:56,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:07:56,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472912716] [2021-12-18 01:07:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:07:56,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:07:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:07:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:07:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:07:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:07:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:07:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:07:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:07:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 01:07:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 01:07:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-18 01:07:56,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:07:56,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472912716] [2021-12-18 01:07:56,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472912716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:07:56,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 01:07:56,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 01:07:56,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037850241] [2021-12-18 01:07:56,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:07:56,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 01:07:56,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:07:56,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 01:07:56,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-18 01:07:56,271 INFO L87 Difference]: Start difference. First operand 459 states and 513 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 6 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 01:07:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:07:56,416 INFO L93 Difference]: Finished difference Result 473 states and 526 transitions. [2021-12-18 01:07:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 01:07:56,416 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 6 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 129 [2021-12-18 01:07:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:07:56,418 INFO L225 Difference]: With dead ends: 473 [2021-12-18 01:07:56,418 INFO L226 Difference]: Without dead ends: 469 [2021-12-18 01:07:56,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-18 01:07:56,418 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 19 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 01:07:56,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 499 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 01:07:56,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-12-18 01:07:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 469. [2021-12-18 01:07:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 369 states have (on average 1.1056910569105691) internal successors, (408), 377 states have internal predecessors, (408), 50 states have call successors, (50), 40 states have call predecessors, (50), 49 states have return successors, (62), 51 states have call predecessors, (62), 47 states have call successors, (62) [2021-12-18 01:07:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 520 transitions. [2021-12-18 01:07:56,445 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 520 transitions. Word has length 129 [2021-12-18 01:07:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:07:56,445 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 520 transitions. [2021-12-18 01:07:56,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 6 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 01:07:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 520 transitions. [2021-12-18 01:07:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-18 01:07:56,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:07:56,447 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:07:56,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-18 01:07:56,447 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:07:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:07:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash 59981980, now seen corresponding path program 1 times [2021-12-18 01:07:56,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:07:56,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104343763] [2021-12-18 01:07:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:07:56,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:07:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:07:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:07:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 01:07:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:07:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 01:07:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 01:07:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:07:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:07:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 01:07:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-18 01:07:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-18 01:07:56,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:07:56,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104343763] [2021-12-18 01:07:56,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104343763] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:07:56,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909771009] [2021-12-18 01:07:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:07:56,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:07:56,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:07:56,652 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:07:56,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 01:07:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:07:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 01:07:56,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:07:56,943 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:07:56,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:07:56,952 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:07:56,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:07:58,468 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_44| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_44|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_44| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_44|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43|) 0)))) is different from true [2021-12-18 01:07:59,866 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_44| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_45| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_45|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_44|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_44| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_45| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_45|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_44|) 0)))) is different from true [2021-12-18 01:08:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 29 trivial. 35 not checked. [2021-12-18 01:08:00,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:08:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-18 01:08:01,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909771009] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:08:01,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:08:01,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 12] total 30 [2021-12-18 01:08:01,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989741845] [2021-12-18 01:08:01,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:08:01,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 01:08:01,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:08:01,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 01:08:01,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=668, Unknown=2, NotChecked=106, Total=870 [2021-12-18 01:08:01,142 INFO L87 Difference]: Start difference. First operand 469 states and 520 transitions. Second operand has 30 states, 30 states have (on average 5.0) internal successors, (150), 28 states have internal predecessors, (150), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-18 01:08:02,835 WARN L860 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_44| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_45| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_45|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_44|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_44| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_45| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_45|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_44|) 0)))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_44| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_44|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_44| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_44|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43|) 0))))) is different from true [2021-12-18 01:08:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:08:03,411 INFO L93 Difference]: Finished difference Result 612 states and 695 transitions. [2021-12-18 01:08:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 01:08:03,413 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.0) internal successors, (150), 28 states have internal predecessors, (150), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 124 [2021-12-18 01:08:03,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:08:03,414 INFO L225 Difference]: With dead ends: 612 [2021-12-18 01:08:03,414 INFO L226 Difference]: Without dead ends: 506 [2021-12-18 01:08:03,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 249 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=319, Invalid=1852, Unknown=3, NotChecked=276, Total=2450 [2021-12-18 01:08:03,415 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 191 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:08:03,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 982 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 435 Invalid, 0 Unknown, 547 Unchecked, 0.2s Time] [2021-12-18 01:08:03,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-12-18 01:08:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 464. [2021-12-18 01:08:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 364 states have (on average 1.1043956043956045) internal successors, (402), 372 states have internal predecessors, (402), 50 states have call successors, (50), 40 states have call predecessors, (50), 49 states have return successors, (62), 51 states have call predecessors, (62), 47 states have call successors, (62) [2021-12-18 01:08:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 514 transitions. [2021-12-18 01:08:03,456 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 514 transitions. Word has length 124 [2021-12-18 01:08:03,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:08:03,456 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 514 transitions. [2021-12-18 01:08:03,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.0) internal successors, (150), 28 states have internal predecessors, (150), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-18 01:08:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 514 transitions. [2021-12-18 01:08:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-18 01:08:03,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:08:03,457 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:08:03,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 01:08:03,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:08:03,671 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:08:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:08:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1512734120, now seen corresponding path program 1 times [2021-12-18 01:08:03,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:08:03,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257261691] [2021-12-18 01:08:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:08:03,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:08:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:03,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:08:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:03,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:08:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:03,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 01:08:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:03,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:03,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:08:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:03,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 01:08:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:03,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 01:08:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:03,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:04,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:08:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:04,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 01:08:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:04,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-18 01:08:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:04,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 92 proven. 25 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-18 01:08:04,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:08:04,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257261691] [2021-12-18 01:08:04,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257261691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:08:04,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004902377] [2021-12-18 01:08:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:08:04,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:08:04,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:08:04,206 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:08:04,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 01:08:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:04,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 155 conjunts are in the unsatisfiable core [2021-12-18 01:08:04,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:08:04,506 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:08:04,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:08:04,517 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:08:04,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:08:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 106 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 01:08:07,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:08:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 97 proven. 34 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-18 01:08:10,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004902377] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:08:10,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:08:10,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 30, 19] total 60 [2021-12-18 01:08:10,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668509264] [2021-12-18 01:08:10,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:08:10,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-18 01:08:10,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:08:10,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-18 01:08:10,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=3325, Unknown=0, NotChecked=0, Total=3540 [2021-12-18 01:08:10,920 INFO L87 Difference]: Start difference. First operand 464 states and 514 transitions. Second operand has 60 states, 57 states have (on average 3.2280701754385963) internal successors, (184), 53 states have internal predecessors, (184), 18 states have call successors, (30), 4 states have call predecessors, (30), 16 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) [2021-12-18 01:08:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:08:14,371 INFO L93 Difference]: Finished difference Result 620 states and 693 transitions. [2021-12-18 01:08:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-18 01:08:14,371 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 57 states have (on average 3.2280701754385963) internal successors, (184), 53 states have internal predecessors, (184), 18 states have call successors, (30), 4 states have call predecessors, (30), 16 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) Word has length 137 [2021-12-18 01:08:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:08:14,373 INFO L225 Difference]: With dead ends: 620 [2021-12-18 01:08:14,373 INFO L226 Difference]: Without dead ends: 526 [2021-12-18 01:08:14,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 255 SyntacticMatches, 13 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2084 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=649, Invalid=8281, Unknown=0, NotChecked=0, Total=8930 [2021-12-18 01:08:14,375 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 193 mSDsluCounter, 2915 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 3005 SdHoareTripleChecker+Invalid, 3215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 625 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 01:08:14,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 3005 Invalid, 3215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2508 Invalid, 0 Unknown, 625 Unchecked, 1.5s Time] [2021-12-18 01:08:14,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-18 01:08:14,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 488. [2021-12-18 01:08:14,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 386 states have (on average 1.0906735751295338) internal successors, (421), 393 states have internal predecessors, (421), 51 states have call successors, (51), 42 states have call predecessors, (51), 50 states have return successors, (61), 52 states have call predecessors, (61), 48 states have call successors, (61) [2021-12-18 01:08:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 533 transitions. [2021-12-18 01:08:14,408 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 533 transitions. Word has length 137 [2021-12-18 01:08:14,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:08:14,408 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 533 transitions. [2021-12-18 01:08:14,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 57 states have (on average 3.2280701754385963) internal successors, (184), 53 states have internal predecessors, (184), 18 states have call successors, (30), 4 states have call predecessors, (30), 16 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) [2021-12-18 01:08:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 533 transitions. [2021-12-18 01:08:14,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-18 01:08:14,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:08:14,409 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:08:14,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-18 01:08:14,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:08:14,619 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:08:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:08:14,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1770899558, now seen corresponding path program 1 times [2021-12-18 01:08:14,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:08:14,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745835519] [2021-12-18 01:08:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:08:14,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:08:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:08:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:08:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 01:08:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:08:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 01:08:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 01:08:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:08:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 01:08:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-18 01:08:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 50 proven. 63 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-18 01:08:14,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:08:14,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745835519] [2021-12-18 01:08:14,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745835519] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:08:14,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714307552] [2021-12-18 01:08:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:08:14,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:08:14,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:08:14,957 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:08:14,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 01:08:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:15,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-18 01:08:15,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:08:15,271 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:08:15,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:08:15,280 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:08:15,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:08:16,832 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_54| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_55| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_55|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_54|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_54| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_55| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_55|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_54|) 0)))) is different from true [2021-12-18 01:08:18,314 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_55| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_56| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_56|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_55|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_55| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_56| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_56|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_55|) 0)))) is different from true [2021-12-18 01:08:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 45 proven. 60 refuted. 0 times theorem prover too weak. 31 trivial. 49 not checked. [2021-12-18 01:08:19,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:08:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 46 proven. 61 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-18 01:08:20,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714307552] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:08:20,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:08:20,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 16] total 44 [2021-12-18 01:08:20,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987556510] [2021-12-18 01:08:20,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:08:20,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 01:08:20,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:08:20,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 01:08:20,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1585, Unknown=2, NotChecked=162, Total=1892 [2021-12-18 01:08:20,547 INFO L87 Difference]: Start difference. First operand 488 states and 533 transitions. Second operand has 44 states, 44 states have (on average 4.25) internal successors, (187), 42 states have internal predecessors, (187), 14 states have call successors, (24), 5 states have call predecessors, (24), 10 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2021-12-18 01:08:22,402 WARN L860 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_55| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_56| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_56|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_55|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_55| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_56| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_56|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_55|) 0)))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_54| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_55| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_55|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_54|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_54| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_55| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_55|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_54|) 0))))) is different from true [2021-12-18 01:08:32,092 WARN L227 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 36 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:08:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:08:41,507 INFO L93 Difference]: Finished difference Result 639 states and 716 transitions. [2021-12-18 01:08:41,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 01:08:41,507 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.25) internal successors, (187), 42 states have internal predecessors, (187), 14 states have call successors, (24), 5 states have call predecessors, (24), 10 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) Word has length 137 [2021-12-18 01:08:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:08:41,509 INFO L225 Difference]: With dead ends: 639 [2021-12-18 01:08:41,509 INFO L226 Difference]: Without dead ends: 523 [2021-12-18 01:08:41,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 273 SyntacticMatches, 16 SemanticMatches, 66 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=407, Invalid=3761, Unknown=4, NotChecked=384, Total=4556 [2021-12-18 01:08:41,510 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 186 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 693 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 01:08:41,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1763 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 737 Invalid, 0 Unknown, 693 Unchecked, 0.4s Time] [2021-12-18 01:08:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-18 01:08:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 479. [2021-12-18 01:08:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 380 states have (on average 1.0868421052631578) internal successors, (413), 384 states have internal predecessors, (413), 51 states have call successors, (51), 42 states have call predecessors, (51), 47 states have return successors, (57), 52 states have call predecessors, (57), 48 states have call successors, (57) [2021-12-18 01:08:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 521 transitions. [2021-12-18 01:08:41,543 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 521 transitions. Word has length 137 [2021-12-18 01:08:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:08:41,544 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 521 transitions. [2021-12-18 01:08:41,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.25) internal successors, (187), 42 states have internal predecessors, (187), 14 states have call successors, (24), 5 states have call predecessors, (24), 10 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2021-12-18 01:08:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 521 transitions. [2021-12-18 01:08:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-18 01:08:41,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:08:41,545 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:08:41,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 01:08:41,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:08:41,760 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:08:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:08:41,760 INFO L85 PathProgramCache]: Analyzing trace with hash 349301439, now seen corresponding path program 1 times [2021-12-18 01:08:41,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:08:41,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634065125] [2021-12-18 01:08:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:08:41,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:08:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:08:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:08:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:08:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:08:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:08:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:08:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:08:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 01:08:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 01:08:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 01:08:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:41,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 01:08:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-18 01:08:42,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:08:42,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634065125] [2021-12-18 01:08:42,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634065125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:08:42,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 01:08:42,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 01:08:42,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509928239] [2021-12-18 01:08:42,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:08:42,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 01:08:42,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:08:42,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 01:08:42,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-18 01:08:42,004 INFO L87 Difference]: Start difference. First operand 479 states and 521 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-18 01:08:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:08:42,197 INFO L93 Difference]: Finished difference Result 496 states and 539 transitions. [2021-12-18 01:08:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 01:08:42,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-18 01:08:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:08:42,199 INFO L225 Difference]: With dead ends: 496 [2021-12-18 01:08:42,200 INFO L226 Difference]: Without dead ends: 484 [2021-12-18 01:08:42,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-18 01:08:42,201 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 47 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 01:08:42,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 255 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 01:08:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-12-18 01:08:42,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 479. [2021-12-18 01:08:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 380 states have (on average 1.0842105263157895) internal successors, (412), 384 states have internal predecessors, (412), 51 states have call successors, (51), 42 states have call predecessors, (51), 47 states have return successors, (57), 52 states have call predecessors, (57), 48 states have call successors, (57) [2021-12-18 01:08:42,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 520 transitions. [2021-12-18 01:08:42,233 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 520 transitions. Word has length 147 [2021-12-18 01:08:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:08:42,234 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 520 transitions. [2021-12-18 01:08:42,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-18 01:08:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 520 transitions. [2021-12-18 01:08:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-18 01:08:42,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:08:42,236 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:08:42,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-18 01:08:42,236 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:08:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:08:42,236 INFO L85 PathProgramCache]: Analyzing trace with hash -460045187, now seen corresponding path program 1 times [2021-12-18 01:08:42,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:08:42,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289315108] [2021-12-18 01:08:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:08:42,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:08:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:08:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:08:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:08:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:08:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:08:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:08:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:08:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 01:08:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 01:08:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 01:08:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 01:08:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-18 01:08:42,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:08:42,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289315108] [2021-12-18 01:08:42,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289315108] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:08:42,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775818376] [2021-12-18 01:08:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:08:42,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:08:42,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:08:42,518 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:08:42,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 01:08:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-18 01:08:42,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:08:42,836 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:08:42,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:08:42,848 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:08:42,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:08:45,029 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60| 24)) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60| 24)) 0)))) is different from true [2021-12-18 01:08:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 14 not checked. [2021-12-18 01:08:46,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:08:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-18 01:08:46,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775818376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:08:46,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:08:46,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 11] total 34 [2021-12-18 01:08:46,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912900458] [2021-12-18 01:08:46,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:08:46,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 01:08:46,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:08:46,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 01:08:46,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=933, Unknown=1, NotChecked=62, Total=1122 [2021-12-18 01:08:46,977 INFO L87 Difference]: Start difference. First operand 479 states and 520 transitions. Second operand has 34 states, 34 states have (on average 5.117647058823529) internal successors, (174), 34 states have internal predecessors, (174), 12 states have call successors, (39), 4 states have call predecessors, (39), 8 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) [2021-12-18 01:08:49,539 WARN L860 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60| 24)) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60| 24)) 0)))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_117| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_117|) 24) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_117| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_117|) 24) 0))))) is different from true [2021-12-18 01:08:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:08:49,786 INFO L93 Difference]: Finished difference Result 525 states and 568 transitions. [2021-12-18 01:08:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 01:08:49,786 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.117647058823529) internal successors, (174), 34 states have internal predecessors, (174), 12 states have call successors, (39), 4 states have call predecessors, (39), 8 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) Word has length 147 [2021-12-18 01:08:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:08:49,788 INFO L225 Difference]: With dead ends: 525 [2021-12-18 01:08:49,788 INFO L226 Difference]: Without dead ends: 500 [2021-12-18 01:08:49,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 290 SyntacticMatches, 17 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=350, Invalid=2106, Unknown=2, NotChecked=194, Total=2652 [2021-12-18 01:08:49,789 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 129 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 493 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 01:08:49,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 955 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 455 Invalid, 0 Unknown, 493 Unchecked, 0.3s Time] [2021-12-18 01:08:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-12-18 01:08:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 477. [2021-12-18 01:08:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 380 states have (on average 1.0789473684210527) internal successors, (410), 384 states have internal predecessors, (410), 49 states have call successors, (49), 42 states have call predecessors, (49), 47 states have return successors, (57), 50 states have call predecessors, (57), 48 states have call successors, (57) [2021-12-18 01:08:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 516 transitions. [2021-12-18 01:08:49,823 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 516 transitions. Word has length 147 [2021-12-18 01:08:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:08:49,823 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 516 transitions. [2021-12-18 01:08:49,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.117647058823529) internal successors, (174), 34 states have internal predecessors, (174), 12 states have call successors, (39), 4 states have call predecessors, (39), 8 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) [2021-12-18 01:08:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 516 transitions. [2021-12-18 01:08:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-18 01:08:49,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:08:49,824 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:08:49,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-18 01:08:50,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-18 01:08:50,030 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:08:50,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:08:50,031 INFO L85 PathProgramCache]: Analyzing trace with hash -853072197, now seen corresponding path program 1 times [2021-12-18 01:08:50,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:08:50,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324048594] [2021-12-18 01:08:50,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:08:50,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:08:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:08:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:08:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:08:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:08:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:08:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:08:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:08:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 01:08:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 01:08:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 01:08:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 01:08:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 72 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-18 01:08:50,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:08:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324048594] [2021-12-18 01:08:50,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324048594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:08:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973765357] [2021-12-18 01:08:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:08:50,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:08:50,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:08:50,367 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:08:50,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 01:08:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:50,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-18 01:08:50,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:08:50,655 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:08:50,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:08:50,664 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:08:50,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:08:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 54 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-18 01:08:51,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:08:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-18 01:08:52,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973765357] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:08:52,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:08:52,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 11] total 33 [2021-12-18 01:08:52,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493980324] [2021-12-18 01:08:52,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:08:52,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 01:08:52,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:08:52,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 01:08:52,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 01:08:52,469 INFO L87 Difference]: Start difference. First operand 477 states and 516 transitions. Second operand has 33 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 10 states have call successors, (38), 4 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 9 states have call successors, (38) [2021-12-18 01:08:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:08:53,048 INFO L93 Difference]: Finished difference Result 500 states and 539 transitions. [2021-12-18 01:08:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 01:08:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 10 states have call successors, (38), 4 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 9 states have call successors, (38) Word has length 147 [2021-12-18 01:08:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:08:53,049 INFO L225 Difference]: With dead ends: 500 [2021-12-18 01:08:53,049 INFO L226 Difference]: Without dead ends: 485 [2021-12-18 01:08:53,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 288 SyntacticMatches, 25 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=304, Invalid=1588, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 01:08:53,050 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 178 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:08:53,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1058 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 335 Invalid, 0 Unknown, 186 Unchecked, 0.2s Time] [2021-12-18 01:08:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-12-18 01:08:53,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 477. [2021-12-18 01:08:53,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 380 states have (on average 1.0736842105263158) internal successors, (408), 384 states have internal predecessors, (408), 49 states have call successors, (49), 42 states have call predecessors, (49), 47 states have return successors, (57), 50 states have call predecessors, (57), 48 states have call successors, (57) [2021-12-18 01:08:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 514 transitions. [2021-12-18 01:08:53,085 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 514 transitions. Word has length 147 [2021-12-18 01:08:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:08:53,086 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 514 transitions. [2021-12-18 01:08:53,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 10 states have call successors, (38), 4 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 9 states have call successors, (38) [2021-12-18 01:08:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 514 transitions. [2021-12-18 01:08:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-18 01:08:53,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:08:53,087 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:08:53,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-18 01:08:53,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-18 01:08:53,288 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:08:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:08:53,288 INFO L85 PathProgramCache]: Analyzing trace with hash -594906759, now seen corresponding path program 1 times [2021-12-18 01:08:53,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:08:53,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283303581] [2021-12-18 01:08:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:08:53,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:08:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:08:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:08:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 01:08:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 01:08:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 01:08:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:08:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:08:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 01:08:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 01:08:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 01:08:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 01:08:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 57 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-18 01:08:53,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:08:53,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283303581] [2021-12-18 01:08:53,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283303581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:08:53,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809214852] [2021-12-18 01:08:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:08:53,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:08:53,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:08:53,513 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:08:53,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 01:08:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-18 01:08:53,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:08:53,804 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:08:53,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:08:53,813 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:08:53,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:08:55,332 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_65| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_65|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_65| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_65|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64|) 0)))) is different from true [2021-12-18 01:08:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 38 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 14 not checked. [2021-12-18 01:08:56,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:08:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-18 01:08:57,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809214852] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:08:57,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:08:57,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 11] total 32 [2021-12-18 01:08:57,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442484940] [2021-12-18 01:08:57,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:08:57,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 01:08:57,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:08:57,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 01:08:57,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=822, Unknown=1, NotChecked=58, Total=992 [2021-12-18 01:08:57,175 INFO L87 Difference]: Start difference. First operand 477 states and 514 transitions. Second operand has 32 states, 32 states have (on average 5.53125) internal successors, (177), 32 states have internal predecessors, (177), 10 states have call successors, (38), 4 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 9 states have call successors, (38) [2021-12-18 01:08:58,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:08:58,189 INFO L93 Difference]: Finished difference Result 503 states and 550 transitions. [2021-12-18 01:08:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 01:08:58,189 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.53125) internal successors, (177), 32 states have internal predecessors, (177), 10 states have call successors, (38), 4 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 9 states have call successors, (38) Word has length 147 [2021-12-18 01:08:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:08:58,191 INFO L225 Difference]: With dead ends: 503 [2021-12-18 01:08:58,191 INFO L226 Difference]: Without dead ends: 484 [2021-12-18 01:08:58,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 290 SyntacticMatches, 23 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=374, Invalid=2491, Unknown=1, NotChecked=104, Total=2970 [2021-12-18 01:08:58,192 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 155 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:08:58,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1107 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 495 Invalid, 0 Unknown, 463 Unchecked, 0.2s Time] [2021-12-18 01:08:58,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-12-18 01:08:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 467. [2021-12-18 01:08:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 370 states have (on average 1.0702702702702702) internal successors, (396), 374 states have internal predecessors, (396), 49 states have call successors, (49), 42 states have call predecessors, (49), 47 states have return successors, (57), 50 states have call predecessors, (57), 48 states have call successors, (57) [2021-12-18 01:08:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 502 transitions. [2021-12-18 01:08:58,227 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 502 transitions. Word has length 147 [2021-12-18 01:08:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:08:58,228 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 502 transitions. [2021-12-18 01:08:58,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.53125) internal successors, (177), 32 states have internal predecessors, (177), 10 states have call successors, (38), 4 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 9 states have call successors, (38) [2021-12-18 01:08:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 502 transitions. [2021-12-18 01:08:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-18 01:08:58,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:08:58,229 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:08:58,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-18 01:08:58,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:08:58,447 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:08:58,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:08:58,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1705157058, now seen corresponding path program 2 times [2021-12-18 01:08:58,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:08:58,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673735169] [2021-12-18 01:08:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:08:58,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:08:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:08:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 01:08:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 01:08:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:08:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 01:08:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 01:08:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:08:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 01:08:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-18 01:08:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:08:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:58,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:08:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:08:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 62 proven. 89 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-18 01:08:59,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:08:59,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673735169] [2021-12-18 01:08:59,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673735169] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:08:59,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514856207] [2021-12-18 01:08:59,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 01:08:59,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:08:59,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:08:59,059 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:08:59,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 01:08:59,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 01:08:59,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 01:08:59,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 185 conjunts are in the unsatisfiable core [2021-12-18 01:08:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:08:59,440 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 01:08:59,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:08:59,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 01:08:59,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 01:08:59,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:08:59,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 01:08:59,550 INFO L354 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2021-12-18 01:08:59,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 90 [2021-12-18 01:08:59,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:08:59,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 74 [2021-12-18 01:08:59,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:08:59,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:08:59,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 25 [2021-12-18 01:08:59,565 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 14 treesize of output 13 [2021-12-18 01:08:59,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:08:59,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-18 01:08:59,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:08:59,576 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 29 treesize of output 21 [2021-12-18 01:08:59,578 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 11 treesize of output 7 [2021-12-18 01:09:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 119 proven. 80 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 01:09:03,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:09:05,258 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3121 (Array Int Int)) (v_ArrVal_3123 (Array Int Int)) (v_ArrVal_3124 (Array Int Int)) (v_ArrVal_3119 (Array Int Int))) (let ((.cse7 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (let ((.cse4 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_3119) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_3121) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) (.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_3123) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_3124) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)))) (let ((.cse3 (select (select .cse1 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) (.cse5 (select (select .cse4 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|))) (let ((.cse0 (select (select .cse1 .cse3) .cse5)) (.cse6 (select (select .cse4 .cse3) .cse5))) (or (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| .cse0)) (let ((.cse2 (+ .cse6 8))) (and (= (select (select .cse1 .cse0) .cse2) .cse3) (= (select (select .cse4 .cse0) .cse2) .cse5))) (not (= (+ |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 16) .cse6)))))))) is different from false [2021-12-18 01:09:05,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:09:05,345 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 814 treesize of output 646 [2021-12-18 01:09:05,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:09:05,364 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 858 treesize of output 690 [2021-12-18 01:09:06,709 INFO L354 Elim1Store]: treesize reduction 58, result has 92.3 percent of original size [2021-12-18 01:09:06,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 24 new quantified variables, introduced 91 case distinctions, treesize of input 134061 treesize of output 104527 [2021-12-18 01:10:56,922 WARN L227 SmtUtils]: Spent 1.81m on a formula simplification. DAG size of input: 2474 DAG size of output: 2378 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-18 01:10:56,926 INFO L354 Elim1Store]: treesize reduction 296, result has 96.9 percent of original size [2021-12-18 01:10:56,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 35 select indices, 35 select index equivalence classes, 0 disjoint index pairs (out of 595 index pairs), introduced 49 new quantified variables, introduced 595 case distinctions, treesize of input 6207129 treesize of output 5541432 [2021-12-18 01:11:23,960 WARN L227 SmtUtils]: Spent 27.01s on a formula simplification that was a NOOP. DAG size: 12993 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:11:50,726 WARN L227 SmtUtils]: Spent 26.65s on a formula simplification that was a NOOP. DAG size: 12876 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:11:53,183 INFO L244 Elim1Store]: Index analysis took 1009 ms Killed by 15