./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 22:14:16,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 22:14:16,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 22:14:16,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 22:14:16,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 22:14:16,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 22:14:16,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 22:14:16,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 22:14:16,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 22:14:16,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 22:14:16,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 22:14:16,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 22:14:16,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 22:14:16,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 22:14:16,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 22:14:16,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 22:14:16,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 22:14:16,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 22:14:16,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 22:14:16,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 22:14:16,803 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 22:14:16,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 22:14:16,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 22:14:16,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 22:14:16,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 22:14:16,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 22:14:16,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 22:14:16,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 22:14:16,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 22:14:16,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 22:14:16,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 22:14:16,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 22:14:16,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 22:14:16,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 22:14:16,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 22:14:16,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 22:14:16,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 22:14:16,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 22:14:16,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 22:14:16,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 22:14:16,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 22:14:16,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 22:14:16,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-19 22:14:16,859 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 22:14:16,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 22:14:16,869 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 22:14:16,869 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 22:14:16,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 22:14:16,870 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 22:14:16,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 22:14:16,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 22:14:16,871 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 22:14:16,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 22:14:16,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 22:14:16,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 22:14:16,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 22:14:16,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 22:14:16,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 22:14:16,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 22:14:16,874 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 22:14:16,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 22:14:16,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 22:14:16,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 22:14:16,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 22:14:16,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 22:14:16,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 22:14:16,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 22:14:16,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 22:14:16,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 22:14:16,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 22:14:16,876 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 22:14:16,877 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 22:14:16,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 22:14:16,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2022-07-19 22:14:17,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 22:14:17,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 22:14:17,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 22:14:17,160 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 22:14:17,161 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 22:14:17,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2022-07-19 22:14:17,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda3a2026/d5039ffd9eca47a1baa9e199d1d05ba5/FLAGb165125ea [2022-07-19 22:14:17,794 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 22:14:17,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2022-07-19 22:14:17,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda3a2026/d5039ffd9eca47a1baa9e199d1d05ba5/FLAGb165125ea [2022-07-19 22:14:17,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda3a2026/d5039ffd9eca47a1baa9e199d1d05ba5 [2022-07-19 22:14:17,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 22:14:17,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 22:14:18,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 22:14:18,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 22:14:18,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 22:14:18,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:14:17" (1/1) ... [2022-07-19 22:14:18,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c2f6f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:18, skipping insertion in model container [2022-07-19 22:14:18,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:14:17" (1/1) ... [2022-07-19 22:14:18,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 22:14:18,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 22:14:18,352 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2022-07-19 22:14:18,358 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2022-07-19 22:14:18,930 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:18,931 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:18,931 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:18,932 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:18,933 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:18,943 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:18,948 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:18,952 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:18,954 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:18,956 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:18,960 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:18,962 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:18,962 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,192 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-19 22:14:19,194 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-19 22:14:19,194 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-19 22:14:19,195 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-19 22:14:19,197 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-19 22:14:19,197 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-19 22:14:19,198 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-19 22:14:19,198 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-19 22:14:19,199 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-19 22:14:19,199 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-19 22:14:19,304 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-19 22:14:19,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 22:14:19,361 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 22:14:19,377 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2022-07-19 22:14:19,383 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2022-07-19 22:14:19,445 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,445 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,446 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,446 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,449 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,464 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,464 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,466 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,469 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,470 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,472 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,472 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,473 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:19,511 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-19 22:14:19,512 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-19 22:14:19,514 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-19 22:14:19,514 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-19 22:14:19,524 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-19 22:14:19,525 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-19 22:14:19,525 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-19 22:14:19,526 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-19 22:14:19,526 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-19 22:14:19,527 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-19 22:14:19,553 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-19 22:14:19,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 22:14:19,827 INFO L208 MainTranslator]: Completed translation [2022-07-19 22:14:19,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:19 WrapperNode [2022-07-19 22:14:19,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 22:14:19,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 22:14:19,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 22:14:19,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 22:14:19,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:19" (1/1) ... [2022-07-19 22:14:19,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:19" (1/1) ... [2022-07-19 22:14:19,953 INFO L137 Inliner]: procedures = 679, calls = 1048, calls flagged for inlining = 49, calls inlined = 4, statements flattened = 89 [2022-07-19 22:14:19,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 22:14:19,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 22:14:19,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 22:14:19,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 22:14:19,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:19" (1/1) ... [2022-07-19 22:14:19,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:19" (1/1) ... [2022-07-19 22:14:19,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:19" (1/1) ... [2022-07-19 22:14:19,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:19" (1/1) ... [2022-07-19 22:14:19,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:19" (1/1) ... [2022-07-19 22:14:20,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:19" (1/1) ... [2022-07-19 22:14:20,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:19" (1/1) ... [2022-07-19 22:14:20,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 22:14:20,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 22:14:20,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 22:14:20,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 22:14:20,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:19" (1/1) ... [2022-07-19 22:14:20,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 22:14:20,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:14:20,069 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) [2022-07-19 22:14:20,070 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 [2022-07-19 22:14:20,095 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-07-19 22:14:20,095 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-07-19 22:14:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2022-07-19 22:14:20,096 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2022-07-19 22:14:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 22:14:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 22:14:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 22:14:20,096 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 22:14:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-07-19 22:14:20,097 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-07-19 22:14:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 22:14:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 22:14:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 22:14:20,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 22:14:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-19 22:14:20,098 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-19 22:14:20,098 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 22:14:20,098 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 22:14:20,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 22:14:20,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 22:14:20,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 22:14:20,098 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-07-19 22:14:20,099 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-07-19 22:14:20,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 22:14:20,265 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 22:14:20,267 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 22:14:20,542 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 22:14:20,547 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 22:14:20,548 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 22:14:20,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:14:20 BoogieIcfgContainer [2022-07-19 22:14:20,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 22:14:20,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 22:14:20,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 22:14:20,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 22:14:20,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:14:17" (1/3) ... [2022-07-19 22:14:20,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd82b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:14:20, skipping insertion in model container [2022-07-19 22:14:20,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:19" (2/3) ... [2022-07-19 22:14:20,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd82b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:14:20, skipping insertion in model container [2022-07-19 22:14:20,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:14:20" (3/3) ... [2022-07-19 22:14:20,559 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2022-07-19 22:14:20,572 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 22:14:20,572 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 22:14:20,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 22:14:20,657 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@646b5d51, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7eda98b5 [2022-07-19 22:14:20,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 22:14:20,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-19 22:14:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 22:14:20,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:14:20,671 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:14:20,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:14:20,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:14:20,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1155526354, now seen corresponding path program 1 times [2022-07-19 22:14:20,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:14:20,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774595289] [2022-07-19 22:14:20,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:14:20,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:14:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:14:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:14:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 22:14:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:14:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 22:14:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:14:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:21,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:14:21,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774595289] [2022-07-19 22:14:21,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774595289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:14:21,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:14:21,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 22:14:21,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515302588] [2022-07-19 22:14:21,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:14:21,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:14:21,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:14:21,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:14:21,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 22:14:21,252 INFO L87 Difference]: Start difference. First operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 22:14:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:14:21,378 INFO L93 Difference]: Finished difference Result 147 states and 204 transitions. [2022-07-19 22:14:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 22:14:21,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-07-19 22:14:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:14:21,387 INFO L225 Difference]: With dead ends: 147 [2022-07-19 22:14:21,387 INFO L226 Difference]: Without dead ends: 73 [2022-07-19 22:14:21,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-19 22:14:21,393 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 28 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:14:21,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 420 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 22:14:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-19 22:14:21,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-07-19 22:14:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-19 22:14:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-07-19 22:14:21,450 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 48 [2022-07-19 22:14:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:14:21,451 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-07-19 22:14:21,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 22:14:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-07-19 22:14:21,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 22:14:21,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:14:21,454 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:14:21,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 22:14:21,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:14:21,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:14:21,458 INFO L85 PathProgramCache]: Analyzing trace with hash 209823880, now seen corresponding path program 1 times [2022-07-19 22:14:21,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:14:21,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978716638] [2022-07-19 22:14:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:14:21,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:14:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:14:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:14:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 22:14:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:14:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 22:14:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 22:14:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:14:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:21,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:14:21,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978716638] [2022-07-19 22:14:21,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978716638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:14:21,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:14:21,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 22:14:21,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146740679] [2022-07-19 22:14:21,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:14:21,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 22:14:21,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:14:21,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 22:14:21,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-19 22:14:21,737 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:14:22,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:14:22,090 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2022-07-19 22:14:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:14:22,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2022-07-19 22:14:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:14:22,094 INFO L225 Difference]: With dead ends: 143 [2022-07-19 22:14:22,094 INFO L226 Difference]: Without dead ends: 77 [2022-07-19 22:14:22,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-19 22:14:22,099 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 68 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:14:22,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 200 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 22:14:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-19 22:14:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-07-19 22:14:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-07-19 22:14:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-07-19 22:14:22,120 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 54 [2022-07-19 22:14:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:14:22,120 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-07-19 22:14:22,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:14:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-07-19 22:14:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 22:14:22,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:14:22,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:14:22,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 22:14:22,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:14:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:14:22,125 INFO L85 PathProgramCache]: Analyzing trace with hash 637356428, now seen corresponding path program 1 times [2022-07-19 22:14:22,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:14:22,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099650814] [2022-07-19 22:14:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:14:22,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:14:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:14:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:14:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 22:14:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:14:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 22:14:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 22:14:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:14:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:22,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:14:22,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099650814] [2022-07-19 22:14:22,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099650814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:14:22,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:14:22,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 22:14:22,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769818724] [2022-07-19 22:14:22,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:14:22,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:14:22,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:14:22,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:14:22,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 22:14:22,376 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-19 22:14:22,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:14:22,645 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2022-07-19 22:14:22,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 22:14:22,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-07-19 22:14:22,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:14:22,649 INFO L225 Difference]: With dead ends: 87 [2022-07-19 22:14:22,649 INFO L226 Difference]: Without dead ends: 85 [2022-07-19 22:14:22,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-19 22:14:22,655 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 46 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:14:22,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 224 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 22:14:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-19 22:14:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-07-19 22:14:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 55 states have internal predecessors, (61), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-19 22:14:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2022-07-19 22:14:22,669 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 54 [2022-07-19 22:14:22,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:14:22,670 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2022-07-19 22:14:22,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-19 22:14:22,670 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2022-07-19 22:14:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 22:14:22,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:14:22,672 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:14:22,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 22:14:22,672 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:14:22,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:14:22,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2089548669, now seen corresponding path program 1 times [2022-07-19 22:14:22,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:14:22,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891344359] [2022-07-19 22:14:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:14:22,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:14:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:14:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:14:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 22:14:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:14:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 22:14:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 22:14:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:14:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:22,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:14:22,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891344359] [2022-07-19 22:14:22,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891344359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:14:22,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:14:22,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 22:14:22,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903176633] [2022-07-19 22:14:22,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:14:22,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 22:14:22,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:14:22,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 22:14:22,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:14:22,898 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:14:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:14:23,098 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2022-07-19 22:14:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:14:23,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2022-07-19 22:14:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:14:23,100 INFO L225 Difference]: With dead ends: 145 [2022-07-19 22:14:23,100 INFO L226 Difference]: Without dead ends: 82 [2022-07-19 22:14:23,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-19 22:14:23,101 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 39 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:14:23,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 157 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 22:14:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-19 22:14:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-07-19 22:14:23,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.169811320754717) internal successors, (62), 56 states have internal predecessors, (62), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-19 22:14:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-07-19 22:14:23,110 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 54 [2022-07-19 22:14:23,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:14:23,110 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-07-19 22:14:23,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:14:23,110 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-07-19 22:14:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 22:14:23,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:14:23,111 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:14:23,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 22:14:23,111 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:14:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:14:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash -247571742, now seen corresponding path program 1 times [2022-07-19 22:14:23,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:14:23,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454363837] [2022-07-19 22:14:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:14:23,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:14:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:23,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:14:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:23,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:14:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:23,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 22:14:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:23,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:14:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:23,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 22:14:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:23,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 22:14:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:23,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 22:14:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:23,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:14:23,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454363837] [2022-07-19 22:14:23,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454363837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:14:23,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254296548] [2022-07-19 22:14:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:14:23,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:14:23,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:14:23,409 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) [2022-07-19 22:14:23,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 22:14:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:23,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 22:14:23,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:14:23,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 22:14:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:24,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:14:24,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-07-19 22:14:24,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-07-19 22:14:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:24,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254296548] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:14:24,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:14:24,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2022-07-19 22:14:24,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909698516] [2022-07-19 22:14:24,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:14:24,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 22:14:24,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:14:24,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 22:14:24,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-19 22:14:24,629 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-19 22:14:25,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:14:25,278 INFO L93 Difference]: Finished difference Result 153 states and 185 transitions. [2022-07-19 22:14:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:14:25,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 55 [2022-07-19 22:14:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:14:25,280 INFO L225 Difference]: With dead ends: 153 [2022-07-19 22:14:25,280 INFO L226 Difference]: Without dead ends: 90 [2022-07-19 22:14:25,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-07-19 22:14:25,281 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 43 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 22:14:25,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 361 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 467 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2022-07-19 22:14:25,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-19 22:14:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2022-07-19 22:14:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 57 states have internal predecessors, (63), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-19 22:14:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2022-07-19 22:14:25,290 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 55 [2022-07-19 22:14:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:14:25,290 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2022-07-19 22:14:25,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-19 22:14:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2022-07-19 22:14:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 22:14:25,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:14:25,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:14:25,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 22:14:25,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:14:25,516 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:14:25,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:14:25,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1019138147, now seen corresponding path program 2 times [2022-07-19 22:14:25,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:14:25,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061385164] [2022-07-19 22:14:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:14:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:14:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:25,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:14:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:25,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:14:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:25,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 22:14:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:25,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:14:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:25,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 22:14:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:25,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 22:14:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:25,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 22:14:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:25,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:14:25,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061385164] [2022-07-19 22:14:25,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061385164] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:14:25,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066032387] [2022-07-19 22:14:25,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 22:14:25,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:14:25,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:14:25,853 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) [2022-07-19 22:14:25,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 22:14:26,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 22:14:26,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 22:14:26,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-19 22:14:26,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:14:26,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-19 22:14:26,239 INFO L356 Elim1Store]: treesize reduction 30, result has 25.0 percent of original size [2022-07-19 22:14:26,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 22:14:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:28,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:14:29,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-19 22:14:29,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 64 [2022-07-19 22:14:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:29,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066032387] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:14:29,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:14:29,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2022-07-19 22:14:29,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074314669] [2022-07-19 22:14:29,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:14:29,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 22:14:29,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:14:29,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 22:14:29,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=358, Unknown=1, NotChecked=0, Total=420 [2022-07-19 22:14:29,125 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 19 states have internal predecessors, (56), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-19 22:14:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:14:29,887 INFO L93 Difference]: Finished difference Result 151 states and 183 transitions. [2022-07-19 22:14:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 22:14:29,887 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 19 states have internal predecessors, (56), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 56 [2022-07-19 22:14:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:14:29,888 INFO L225 Difference]: With dead ends: 151 [2022-07-19 22:14:29,889 INFO L226 Difference]: Without dead ends: 86 [2022-07-19 22:14:29,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=103, Invalid=652, Unknown=1, NotChecked=0, Total=756 [2022-07-19 22:14:29,890 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 48 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 22:14:29,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 396 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 600 Invalid, 0 Unknown, 139 Unchecked, 0.5s Time] [2022-07-19 22:14:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-19 22:14:29,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-07-19 22:14:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 60 states have internal predecessors, (67), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-19 22:14:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-07-19 22:14:29,899 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 56 [2022-07-19 22:14:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:14:29,900 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-07-19 22:14:29,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 19 states have internal predecessors, (56), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-19 22:14:29,900 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-07-19 22:14:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 22:14:29,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:14:29,901 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:14:29,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 22:14:30,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 22:14:30,108 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:14:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:14:30,108 INFO L85 PathProgramCache]: Analyzing trace with hash 223290509, now seen corresponding path program 1 times [2022-07-19 22:14:30,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:14:30,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536326042] [2022-07-19 22:14:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:14:30,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:14:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:30,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:14:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:30,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:14:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:30,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 22:14:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:30,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:14:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:30,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 22:14:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:30,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 22:14:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:30,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:14:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 22:14:30,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:14:30,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536326042] [2022-07-19 22:14:30,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536326042] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:14:30,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196784216] [2022-07-19 22:14:30,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:14:30,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:14:30,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:14:30,384 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) [2022-07-19 22:14:30,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 22:14:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:30,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-19 22:14:30,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:14:30,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-19 22:14:30,742 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-19 22:14:30,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 22:14:30,784 INFO L356 Elim1Store]: treesize reduction 72, result has 22.6 percent of original size [2022-07-19 22:14:30,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-07-19 22:14:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:33,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:14:33,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-19 22:14:33,774 INFO L390 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 386 treesize of output 378 [2022-07-19 22:14:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:33,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196784216] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:14:33,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:14:33,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 26 [2022-07-19 22:14:33,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004033454] [2022-07-19 22:14:33,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:14:33,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 22:14:33,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:14:33,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 22:14:33,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=572, Unknown=1, NotChecked=0, Total=650 [2022-07-19 22:14:33,980 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 24 states have internal predecessors, (67), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-19 22:14:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:14:34,863 INFO L93 Difference]: Finished difference Result 176 states and 219 transitions. [2022-07-19 22:14:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 22:14:34,864 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 24 states have internal predecessors, (67), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 60 [2022-07-19 22:14:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:14:34,865 INFO L225 Difference]: With dead ends: 176 [2022-07-19 22:14:34,865 INFO L226 Difference]: Without dead ends: 111 [2022-07-19 22:14:34,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=134, Invalid=1055, Unknown=1, NotChecked=0, Total=1190 [2022-07-19 22:14:34,867 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 50 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 22:14:34,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 532 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 598 Invalid, 0 Unknown, 302 Unchecked, 0.5s Time] [2022-07-19 22:14:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-19 22:14:34,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 98. [2022-07-19 22:14:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.196969696969697) internal successors, (79), 71 states have internal predecessors, (79), 19 states have call successors, (19), 8 states have call predecessors, (19), 12 states have return successors, (23), 18 states have call predecessors, (23), 18 states have call successors, (23) [2022-07-19 22:14:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2022-07-19 22:14:34,878 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 60 [2022-07-19 22:14:34,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:14:34,879 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2022-07-19 22:14:34,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 24 states have internal predecessors, (67), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-19 22:14:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2022-07-19 22:14:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 22:14:34,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:14:34,880 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:14:34,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 22:14:35,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:14:35,096 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:14:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:14:35,097 INFO L85 PathProgramCache]: Analyzing trace with hash 25790573, now seen corresponding path program 2 times [2022-07-19 22:14:35,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:14:35,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452946424] [2022-07-19 22:14:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:14:35,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:14:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:35,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:14:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:35,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:14:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 22:14:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:35,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:14:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:35,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 22:14:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:35,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 22:14:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:35,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:14:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:14:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 22:14:35,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:14:35,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452946424] [2022-07-19 22:14:35,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452946424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:14:35,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986540352] [2022-07-19 22:14:35,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 22:14:35,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:14:35,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:14:35,476 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) [2022-07-19 22:14:35,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 22:14:35,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 22:14:35,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 22:14:35,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-19 22:14:35,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:14:35,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-19 22:14:35,870 INFO L356 Elim1Store]: treesize reduction 30, result has 25.0 percent of original size [2022-07-19 22:14:35,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 22:14:35,932 INFO L356 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2022-07-19 22:14:35,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-07-19 22:14:35,996 INFO L356 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2022-07-19 22:14:35,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-07-19 22:14:36,068 INFO L356 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2022-07-19 22:14:36,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-07-19 22:14:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:14:36,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:14:50,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-07-19 22:14:50,452 INFO L390 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 96750 treesize of output 96238