./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_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 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:55:20,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:55:20,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:55:20,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:55:20,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:55:20,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:55:20,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:55:20,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:55:20,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:55:20,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:55:20,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:55:20,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:55:20,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:55:20,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:55:20,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:55:20,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:55:20,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:55:20,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:55:20,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:55:20,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:55:20,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:55:20,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:55:20,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:55:20,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:55:20,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:55:20,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:55:20,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:55:20,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:55:20,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:55:20,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:55:20,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:55:20,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:55:20,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:55:20,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:55:20,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:55:20,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:55:20,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:55:20,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:55:20,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:55:20,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:55:20,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:55:20,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 13:55:20,610 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:55:20,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:55:20,612 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:55:20,612 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:55:20,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:55:20,613 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:55:20,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:55:20,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:55:20,614 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:55:20,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:55:20,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:55:20,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:55:20,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:55:20,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:55:20,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:55:20,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:55:20,616 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:55:20,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:55:20,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:55:20,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:55:20,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:55:20,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:55:20,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:55:20,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:55:20,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:55:20,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:55:20,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:55:20,617 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:55:20,617 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:55:20,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:55:20,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:55:20,618 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 [2021-12-22 13:55:20,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:55:20,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:55:20,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:55:20,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:55:20,831 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:55:20,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-12-22 13:55:20,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ef9984a9/0749b4638a474b5aaad1dfec4c780e62/FLAG9fd9db2cf [2021-12-22 13:55:21,490 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:55:21,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-12-22 13:55:21,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ef9984a9/0749b4638a474b5aaad1dfec4c780e62/FLAG9fd9db2cf [2021-12-22 13:55:21,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ef9984a9/0749b4638a474b5aaad1dfec4c780e62 [2021-12-22 13:55:21,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:55:21,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:55:21,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:55:21,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:55:21,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:55:21,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:55:21" (1/1) ... [2021-12-22 13:55:21,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12bdd284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:21, skipping insertion in model container [2021-12-22 13:55:21,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:55:21" (1/1) ... [2021-12-22 13:55:21,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:55:21,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:55:22,145 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_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-12-22 13:55:22,160 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_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-12-22 13:55:22,686 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:22,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:22,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:22,689 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:22,691 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:22,708 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:22,708 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:22,709 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:22,710 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:22,896 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 13:55:22,897 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 13:55:22,898 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 13:55:22,898 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 13:55:22,899 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 13:55:22,900 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 13:55:22,900 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 13:55:22,901 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 13:55:22,901 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 13:55:22,902 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 13:55:22,983 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 13:55:23,035 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,036 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:55:23,136 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:55:23,147 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_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-12-22 13:55:23,147 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_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-12-22 13:55:23,166 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,166 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,166 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,167 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,168 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,173 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,173 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,190 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 13:55:23,191 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 13:55:23,191 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 13:55:23,191 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 13:55:23,192 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 13:55:23,192 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 13:55:23,193 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 13:55:23,193 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 13:55:23,193 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 13:55:23,194 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 13:55:23,214 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 13:55:23,277 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,278 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:23,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:55:23,467 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:55:23,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:23 WrapperNode [2021-12-22 13:55:23,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:55:23,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:55:23,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:55:23,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:55:23,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:23" (1/1) ... [2021-12-22 13:55:23,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:23" (1/1) ... [2021-12-22 13:55:23,607 INFO L137 Inliner]: procedures = 691, calls = 2661, calls flagged for inlining = 59, calls inlined = 5, statements flattened = 862 [2021-12-22 13:55:23,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:55:23,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:55:23,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:55:23,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:55:23,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:23" (1/1) ... [2021-12-22 13:55:23,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:23" (1/1) ... [2021-12-22 13:55:23,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:23" (1/1) ... [2021-12-22 13:55:23,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:23" (1/1) ... [2021-12-22 13:55:23,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:23" (1/1) ... [2021-12-22 13:55:23,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:23" (1/1) ... [2021-12-22 13:55:23,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:23" (1/1) ... [2021-12-22 13:55:23,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:55:23,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:55:23,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:55:23,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:55:23,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:23" (1/1) ... [2021-12-22 13:55:23,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:55:23,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:23,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:55:23,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:55:23,726 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-22 13:55:23,727 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-22 13:55:23,727 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_ignore_case [2021-12-22 13:55:23,727 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_ignore_case [2021-12-22 13:55:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:55:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-22 13:55:23,728 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-22 13:55:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:55:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 13:55:23,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 13:55:23,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:55:23,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:55:23,729 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-22 13:55:23,730 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-22 13:55:23,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 13:55:23,730 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-12-22 13:55:23,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-12-22 13:55:23,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:55:23,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:55:23,731 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-22 13:55:23,731 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-22 13:55:23,731 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-22 13:55:23,731 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-22 13:55:23,732 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 13:55:23,732 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 13:55:23,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:55:23,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 13:55:23,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 13:55:23,733 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-22 13:55:23,733 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-22 13:55:23,733 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-12-22 13:55:23,733 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-12-22 13:55:23,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:55:23,734 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2021-12-22 13:55:23,734 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2021-12-22 13:55:23,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:55:23,980 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:55:23,981 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:55:24,719 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:55:24,726 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:55:24,726 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 13:55:24,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:55:24 BoogieIcfgContainer [2021-12-22 13:55:24,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:55:24,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:55:24,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:55:24,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:55:24,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:55:21" (1/3) ... [2021-12-22 13:55:24,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fcfefd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:55:24, skipping insertion in model container [2021-12-22 13:55:24,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:23" (2/3) ... [2021-12-22 13:55:24,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fcfefd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:55:24, skipping insertion in model container [2021-12-22 13:55:24,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:55:24" (3/3) ... [2021-12-22 13:55:24,733 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_ignore_case_harness.i [2021-12-22 13:55:24,737 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:55:24,737 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:55:24,780 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:55:24,794 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:55:24,794 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 13:55:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 88 states have internal predecessors, (108), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-22 13:55:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:55:24,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:24,823 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:24,824 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:24,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:24,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1731481966, now seen corresponding path program 1 times [2021-12-22 13:55:24,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:24,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119563300] [2021-12-22 13:55:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:24,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:55:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:55:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:55:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:55:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-22 13:55:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-22 13:55:25,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:25,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119563300] [2021-12-22 13:55:25,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119563300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:25,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:55:25,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:55:25,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778223929] [2021-12-22 13:55:25,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:25,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:55:25,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:25,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:55:25,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:55:25,483 INFO L87 Difference]: Start difference. First operand has 143 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 88 states have internal predecessors, (108), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:55:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:25,838 INFO L93 Difference]: Finished difference Result 284 states and 410 transitions. [2021-12-22 13:55:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:55:25,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2021-12-22 13:55:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:25,846 INFO L225 Difference]: With dead ends: 284 [2021-12-22 13:55:25,846 INFO L226 Difference]: Without dead ends: 140 [2021-12-22 13:55:25,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:55:25,857 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 219 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:25,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 209 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:55:25,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-22 13:55:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2021-12-22 13:55:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 83 states have (on average 1.216867469879518) internal successors, (101), 84 states have internal predecessors, (101), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-22 13:55:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2021-12-22 13:55:25,907 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 113 [2021-12-22 13:55:25,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:25,908 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2021-12-22 13:55:25,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:55:25,908 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2021-12-22 13:55:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:55:25,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:25,917 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:25,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:55:25,918 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:25,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:25,918 INFO L85 PathProgramCache]: Analyzing trace with hash 57376236, now seen corresponding path program 1 times [2021-12-22 13:55:25,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:25,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046143206] [2021-12-22 13:55:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:25,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:55:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:55:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:55:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:55:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-22 13:55:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-22 13:55:26,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:26,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046143206] [2021-12-22 13:55:26,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046143206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:26,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346554866] [2021-12-22 13:55:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:26,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:26,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:26,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:26,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:55:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:26,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:55:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:55:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-22 13:55:26,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:55:26,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346554866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:26,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:55:26,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-12-22 13:55:26,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395611191] [2021-12-22 13:55:26,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:26,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:55:26,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:55:26,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:55:26,964 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:55:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:27,169 INFO L93 Difference]: Finished difference Result 272 states and 367 transitions. [2021-12-22 13:55:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:55:27,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 113 [2021-12-22 13:55:27,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:27,173 INFO L225 Difference]: With dead ends: 272 [2021-12-22 13:55:27,174 INFO L226 Difference]: Without dead ends: 141 [2021-12-22 13:55:27,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:55:27,177 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 196 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:27,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 415 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:55:27,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-22 13:55:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-22 13:55:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 87 states have internal predecessors, (103), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (47), 41 states have call predecessors, (47), 41 states have call successors, (47) [2021-12-22 13:55:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2021-12-22 13:55:27,204 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 113 [2021-12-22 13:55:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:27,205 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2021-12-22 13:55:27,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:55:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2021-12-22 13:55:27,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-22 13:55:27,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:27,211 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:27,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 13:55:27,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:27,432 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:27,432 INFO L85 PathProgramCache]: Analyzing trace with hash -590863305, now seen corresponding path program 1 times [2021-12-22 13:55:27,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:27,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311487656] [2021-12-22 13:55:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:27,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:55:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:55:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:55:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:55:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-22 13:55:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-22 13:55:27,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:27,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311487656] [2021-12-22 13:55:27,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311487656] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:27,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741387065] [2021-12-22 13:55:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:27,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:27,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:27,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:27,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:55:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:28,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 2793 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:55:28,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:55:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-22 13:55:28,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:55:28,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741387065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:28,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:55:28,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-12-22 13:55:28,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735030826] [2021-12-22 13:55:28,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:28,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:55:28,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:28,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:55:28,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:55:28,518 INFO L87 Difference]: Start difference. First operand 141 states and 192 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-22 13:55:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:28,738 INFO L93 Difference]: Finished difference Result 227 states and 311 transitions. [2021-12-22 13:55:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:55:28,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 119 [2021-12-22 13:55:28,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:28,740 INFO L225 Difference]: With dead ends: 227 [2021-12-22 13:55:28,740 INFO L226 Difference]: Without dead ends: 141 [2021-12-22 13:55:28,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-12-22 13:55:28,741 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 203 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:28,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 550 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:55:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-22 13:55:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-22 13:55:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 87 states have internal predecessors, (103), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (45), 41 states have call predecessors, (45), 41 states have call successors, (45) [2021-12-22 13:55:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 190 transitions. [2021-12-22 13:55:28,750 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 190 transitions. Word has length 119 [2021-12-22 13:55:28,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:28,750 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 190 transitions. [2021-12-22 13:55:28,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-22 13:55:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 190 transitions. [2021-12-22 13:55:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-22 13:55:28,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:28,752 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:28,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:55:28,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-22 13:55:28,978 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:28,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1636756019, now seen corresponding path program 2 times [2021-12-22 13:55:28,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:28,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881070923] [2021-12-22 13:55:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:28,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:55:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:55:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:55:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 13:55:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 13:55:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-22 13:55:29,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:29,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881070923] [2021-12-22 13:55:29,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881070923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:29,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239135722] [2021-12-22 13:55:29,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:55:29,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:29,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:29,358 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:29,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:55:29,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 13:55:29,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:55:29,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 13:55:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:55:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-22 13:55:29,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:55:29,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239135722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:29,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:55:29,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-12-22 13:55:29,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926262248] [2021-12-22 13:55:29,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:29,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:55:29,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:55:29,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:55:29,993 INFO L87 Difference]: Start difference. First operand 141 states and 190 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-22 13:55:30,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:30,058 INFO L93 Difference]: Finished difference Result 153 states and 209 transitions. [2021-12-22 13:55:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:55:30,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 131 [2021-12-22 13:55:30,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:30,061 INFO L225 Difference]: With dead ends: 153 [2021-12-22 13:55:30,061 INFO L226 Difference]: Without dead ends: 151 [2021-12-22 13:55:30,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:55:30,062 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:30,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1262 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:55:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-22 13:55:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-12-22 13:55:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 94 states have internal predecessors, (109), 43 states have call successors, (43), 13 states have call predecessors, (43), 15 states have return successors, (54), 42 states have call predecessors, (54), 42 states have call successors, (54) [2021-12-22 13:55:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 206 transitions. [2021-12-22 13:55:30,074 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 206 transitions. Word has length 131 [2021-12-22 13:55:30,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:30,075 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 206 transitions. [2021-12-22 13:55:30,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-22 13:55:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 206 transitions. [2021-12-22 13:55:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-22 13:55:30,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:30,077 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:30,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 13:55:30,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:30,290 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:30,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:30,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1157375339, now seen corresponding path program 1 times [2021-12-22 13:55:30,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:30,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210106255] [2021-12-22 13:55:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:30,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:55:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:55:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:55:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 13:55:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 13:55:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-22 13:55:30,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:30,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210106255] [2021-12-22 13:55:30,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210106255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:30,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121859398] [2021-12-22 13:55:30,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:30,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:30,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:30,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:30,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:55:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:31,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 2839 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:55:31,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:55:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-22 13:55:31,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:55:31,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121859398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:31,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:55:31,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-22 13:55:31,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651884589] [2021-12-22 13:55:31,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:31,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:55:31,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:31,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:55:31,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:55:31,271 INFO L87 Difference]: Start difference. First operand 150 states and 206 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-22 13:55:31,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:31,462 INFO L93 Difference]: Finished difference Result 260 states and 358 transitions. [2021-12-22 13:55:31,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:55:31,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 135 [2021-12-22 13:55:31,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:31,464 INFO L225 Difference]: With dead ends: 260 [2021-12-22 13:55:31,464 INFO L226 Difference]: Without dead ends: 147 [2021-12-22 13:55:31,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:55:31,465 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 202 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:31,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 550 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:55:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-22 13:55:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-12-22 13:55:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 91 states have internal predecessors, (106), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2021-12-22 13:55:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 199 transitions. [2021-12-22 13:55:31,474 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 199 transitions. Word has length 135 [2021-12-22 13:55:31,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:31,474 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 199 transitions. [2021-12-22 13:55:31,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-22 13:55:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 199 transitions. [2021-12-22 13:55:31,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-22 13:55:31,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:31,476 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:31,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:55:31,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:31,691 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:31,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 707842976, now seen corresponding path program 1 times [2021-12-22 13:55:31,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:31,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388598908] [2021-12-22 13:55:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:31,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:31,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:31,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:31,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:31,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:31,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:31,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:31,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:31,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:55:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:31,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:31,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:31,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:55:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 13:55:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:55:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-22 13:55:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-22 13:55:32,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:32,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388598908] [2021-12-22 13:55:32,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388598908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:32,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:55:32,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:55:32,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372878895] [2021-12-22 13:55:32,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:32,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:55:32,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:32,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:55:32,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:55:32,089 INFO L87 Difference]: Start difference. First operand 147 states and 199 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-22 13:55:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:32,543 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2021-12-22 13:55:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:55:32,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 141 [2021-12-22 13:55:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:32,545 INFO L225 Difference]: With dead ends: 314 [2021-12-22 13:55:32,545 INFO L226 Difference]: Without dead ends: 174 [2021-12-22 13:55:32,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:55:32,546 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 242 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:32,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 350 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:55:32,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-22 13:55:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 152. [2021-12-22 13:55:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 94 states have (on average 1.202127659574468) internal successors, (113), 96 states have internal predecessors, (113), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2021-12-22 13:55:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2021-12-22 13:55:32,556 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 206 transitions. Word has length 141 [2021-12-22 13:55:32,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:32,557 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 206 transitions. [2021-12-22 13:55:32,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-22 13:55:32,557 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 206 transitions. [2021-12-22 13:55:32,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-22 13:55:32,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:32,559 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:32,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:55:32,559 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:32,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:32,559 INFO L85 PathProgramCache]: Analyzing trace with hash 966008414, now seen corresponding path program 1 times [2021-12-22 13:55:32,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:32,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063288779] [2021-12-22 13:55:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:32,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:55:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:32,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:33,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:33,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:33,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:55:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:33,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:33,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 13:55:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:33,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:55:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:33,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:33,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:33,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-22 13:55:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-22 13:55:33,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:33,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063288779] [2021-12-22 13:55:33,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063288779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:33,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070491164] [2021-12-22 13:55:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:33,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:33,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:33,369 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:33,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:55:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:33,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 2851 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 13:55:33,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:55:33,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 13:55:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-22 13:55:34,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:55:34,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070491164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:34,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:55:34,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2021-12-22 13:55:34,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306884338] [2021-12-22 13:55:34,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:34,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 13:55:34,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:34,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 13:55:34,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-12-22 13:55:34,391 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-22 13:55:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:34,489 INFO L93 Difference]: Finished difference Result 320 states and 429 transitions. [2021-12-22 13:55:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:55:34,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 141 [2021-12-22 13:55:34,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:34,491 INFO L225 Difference]: With dead ends: 320 [2021-12-22 13:55:34,491 INFO L226 Difference]: Without dead ends: 171 [2021-12-22 13:55:34,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2021-12-22 13:55:34,493 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 25 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:34,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1172 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2021-12-22 13:55:34,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-22 13:55:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-12-22 13:55:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 114 states have internal predecessors, (136), 43 states have call successors, (43), 14 states have call predecessors, (43), 15 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2021-12-22 13:55:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 229 transitions. [2021-12-22 13:55:34,522 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 229 transitions. Word has length 141 [2021-12-22 13:55:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:34,522 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 229 transitions. [2021-12-22 13:55:34,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-22 13:55:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 229 transitions. [2021-12-22 13:55:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-22 13:55:34,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:34,524 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:34,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:55:34,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:34,735 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1067385632, now seen corresponding path program 1 times [2021-12-22 13:55:34,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:34,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826966508] [2021-12-22 13:55:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:34,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:55:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:55:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 13:55:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:55:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-22 13:55:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-22 13:55:34,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:34,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826966508] [2021-12-22 13:55:34,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826966508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:34,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197641070] [2021-12-22 13:55:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:34,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:34,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:34,943 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:34,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:55:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 2846 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:55:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:55:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-22 13:55:35,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:55:35,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197641070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:35,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:55:35,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-22 13:55:35,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083609058] [2021-12-22 13:55:35,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:35,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:55:35,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:35,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:55:35,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:55:35,569 INFO L87 Difference]: Start difference. First operand 171 states and 229 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:55:35,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:35,591 INFO L93 Difference]: Finished difference Result 329 states and 448 transitions. [2021-12-22 13:55:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:55:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 141 [2021-12-22 13:55:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:35,593 INFO L225 Difference]: With dead ends: 329 [2021-12-22 13:55:35,593 INFO L226 Difference]: Without dead ends: 180 [2021-12-22 13:55:35,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:55:35,594 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 20 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:35,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 541 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:55:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-22 13:55:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 163. [2021-12-22 13:55:35,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 106 states have internal predecessors, (127), 43 states have call successors, (43), 14 states have call predecessors, (43), 14 states have return successors, (49), 42 states have call predecessors, (49), 42 states have call successors, (49) [2021-12-22 13:55:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 219 transitions. [2021-12-22 13:55:35,612 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 219 transitions. Word has length 141 [2021-12-22 13:55:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:35,613 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 219 transitions. [2021-12-22 13:55:35,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:55:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 219 transitions. [2021-12-22 13:55:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-22 13:55:35,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:35,615 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:35,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:55:35,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:35,831 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:35,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:35,832 INFO L85 PathProgramCache]: Analyzing trace with hash -707487644, now seen corresponding path program 2 times [2021-12-22 13:55:35,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:35,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786404250] [2021-12-22 13:55:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:35,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:35,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:35,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:55:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 13:55:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 13:55:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:55:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:55:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:55:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:55:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-22 13:55:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-22 13:55:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-22 13:55:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-22 13:55:36,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:36,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786404250] [2021-12-22 13:55:36,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786404250] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:36,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126897925] [2021-12-22 13:55:36,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:55:36,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:36,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:36,168 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:36,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:55:37,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:55:37,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:55:37,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 13:55:37,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:55:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-22 13:55:37,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:55:37,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126897925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:37,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:55:37,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-22 13:55:37,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424585791] [2021-12-22 13:55:37,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:37,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:55:37,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:37,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:55:37,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:55:37,402 INFO L87 Difference]: Start difference. First operand 163 states and 219 transitions. Second operand has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:55:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:37,518 INFO L93 Difference]: Finished difference Result 317 states and 429 transitions. [2021-12-22 13:55:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:55:37,519 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 145 [2021-12-22 13:55:37,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:37,520 INFO L225 Difference]: With dead ends: 317 [2021-12-22 13:55:37,520 INFO L226 Difference]: Without dead ends: 168 [2021-12-22 13:55:37,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:55:37,521 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 12 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:37,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1366 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:55:37,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-22 13:55:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-12-22 13:55:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 109 states have (on average 1.201834862385321) internal successors, (131), 111 states have internal predecessors, (131), 43 states have call successors, (43), 14 states have call predecessors, (43), 15 states have return successors, (56), 42 states have call predecessors, (56), 42 states have call successors, (56) [2021-12-22 13:55:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 230 transitions. [2021-12-22 13:55:37,538 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 230 transitions. Word has length 145 [2021-12-22 13:55:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:37,539 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 230 transitions. [2021-12-22 13:55:37,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:55:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 230 transitions. [2021-12-22 13:55:37,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-22 13:55:37,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:37,541 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:37,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:55:37,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:37,763 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:37,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:37,763 INFO L85 PathProgramCache]: Analyzing trace with hash 434192105, now seen corresponding path program 1 times [2021-12-22 13:55:37,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:37,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673118322] [2021-12-22 13:55:37,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:37,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:55:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:55:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:55:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:55:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 13:55:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-22 13:55:37,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:37,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673118322] [2021-12-22 13:55:37,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673118322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:37,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200324263] [2021-12-22 13:55:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:37,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:37,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:37,980 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:37,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:55:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:38,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2863 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:55:38,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:55:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-22 13:55:38,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:55:38,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200324263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:38,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:55:38,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-22 13:55:38,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228263163] [2021-12-22 13:55:38,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:38,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:55:38,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:38,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:55:38,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:55:38,620 INFO L87 Difference]: Start difference. First operand 168 states and 230 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:55:38,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:38,645 INFO L93 Difference]: Finished difference Result 327 states and 453 transitions. [2021-12-22 13:55:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:55:38,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 147 [2021-12-22 13:55:38,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:38,646 INFO L225 Difference]: With dead ends: 327 [2021-12-22 13:55:38,646 INFO L226 Difference]: Without dead ends: 171 [2021-12-22 13:55:38,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:55:38,647 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 9 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:38,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 534 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:55:38,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-22 13:55:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2021-12-22 13:55:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 109 states have (on average 1.18348623853211) internal successors, (129), 111 states have internal predecessors, (129), 43 states have call successors, (43), 14 states have call predecessors, (43), 15 states have return successors, (56), 42 states have call predecessors, (56), 42 states have call successors, (56) [2021-12-22 13:55:38,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 228 transitions. [2021-12-22 13:55:38,655 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 228 transitions. Word has length 147 [2021-12-22 13:55:38,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:38,656 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 228 transitions. [2021-12-22 13:55:38,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:55:38,656 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 228 transitions. [2021-12-22 13:55:38,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-22 13:55:38,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:38,657 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:38,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:55:38,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 13:55:38,867 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:38,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:38,867 INFO L85 PathProgramCache]: Analyzing trace with hash -589889235, now seen corresponding path program 1 times [2021-12-22 13:55:38,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:38,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409783639] [2021-12-22 13:55:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:38,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:38,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:38,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:38,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:38,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:55:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:55:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:55:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:55:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 13:55:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-22 13:55:39,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:39,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409783639] [2021-12-22 13:55:39,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409783639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:39,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913269527] [2021-12-22 13:55:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:39,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:39,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:39,109 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:39,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:55:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:39,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:55:39,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:55:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-22 13:55:39,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:55:39,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913269527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:39,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:55:39,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-22 13:55:39,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050204918] [2021-12-22 13:55:39,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:39,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:55:39,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:39,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:55:39,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:55:39,760 INFO L87 Difference]: Start difference. First operand 168 states and 228 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:55:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:39,780 INFO L93 Difference]: Finished difference Result 333 states and 469 transitions. [2021-12-22 13:55:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:55:39,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 147 [2021-12-22 13:55:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:39,782 INFO L225 Difference]: With dead ends: 333 [2021-12-22 13:55:39,782 INFO L226 Difference]: Without dead ends: 177 [2021-12-22 13:55:39,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:55:39,783 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 34 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:39,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 532 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:55:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-22 13:55:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2021-12-22 13:55:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 105 states have (on average 1.161904761904762) internal successors, (122), 107 states have internal predecessors, (122), 43 states have call successors, (43), 14 states have call predecessors, (43), 15 states have return successors, (56), 42 states have call predecessors, (56), 42 states have call successors, (56) [2021-12-22 13:55:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 221 transitions. [2021-12-22 13:55:39,791 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 221 transitions. Word has length 147 [2021-12-22 13:55:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:39,791 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 221 transitions. [2021-12-22 13:55:39,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:55:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 221 transitions. [2021-12-22 13:55:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-22 13:55:39,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:39,793 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:39,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:55:40,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:40,007 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:40,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1628473809, now seen corresponding path program 1 times [2021-12-22 13:55:40,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:40,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864340883] [2021-12-22 13:55:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:40,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:55:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:55:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:55:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:55:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 13:55:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-22 13:55:40,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:40,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864340883] [2021-12-22 13:55:40,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864340883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:40,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607489862] [2021-12-22 13:55:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:40,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:40,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:40,708 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:40,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:55:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:41,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 2860 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-22 13:55:41,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:55:41,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 13:55:41,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:55:41,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:55:41,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:55:41,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:55:41,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:55:41,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:55:41,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 53 [2021-12-22 13:55:44,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2021-12-22 13:55:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 74 proven. 44 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-22 13:55:44,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:55:48,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607489862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:48,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:55:48,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-12-22 13:55:48,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843812117] [2021-12-22 13:55:48,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 13:55:48,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-22 13:55:48,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:48,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-22 13:55:48,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1013, Unknown=2, NotChecked=0, Total=1122 [2021-12-22 13:55:48,291 INFO L87 Difference]: Start difference. First operand 164 states and 221 transitions. Second operand has 28 states, 23 states have (on average 5.434782608695652) internal successors, (125), 24 states have internal predecessors, (125), 15 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (35), 10 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-22 13:55:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:55,485 INFO L93 Difference]: Finished difference Result 501 states and 825 transitions. [2021-12-22 13:55:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-22 13:55:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 5.434782608695652) internal successors, (125), 24 states have internal predecessors, (125), 15 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (35), 10 states have call predecessors, (35), 15 states have call successors, (35) Word has length 147 [2021-12-22 13:55:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:55,489 INFO L225 Difference]: With dead ends: 501 [2021-12-22 13:55:55,489 INFO L226 Difference]: Without dead ends: 415 [2021-12-22 13:55:55,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 257 SyntacticMatches, 15 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=466, Invalid=3552, Unknown=14, NotChecked=0, Total=4032 [2021-12-22 13:55:55,491 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 284 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 4176 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 5492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 4176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1067 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:55,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 1435 Invalid, 5492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 4176 Invalid, 0 Unknown, 1067 Unchecked, 3.1s Time] [2021-12-22 13:55:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-12-22 13:55:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 265. [2021-12-22 13:55:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 184 states have internal predecessors, (207), 62 states have call successors, (62), 19 states have call predecessors, (62), 23 states have return successors, (110), 61 states have call predecessors, (110), 61 states have call successors, (110) [2021-12-22 13:55:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 379 transitions. [2021-12-22 13:55:55,537 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 379 transitions. Word has length 147 [2021-12-22 13:55:55,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:55,537 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 379 transitions. [2021-12-22 13:55:55,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 5.434782608695652) internal successors, (125), 24 states have internal predecessors, (125), 15 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (35), 10 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-22 13:55:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 379 transitions. [2021-12-22 13:55:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-22 13:55:55,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:55,540 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:55,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:55:55,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 13:55:55,764 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:55,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:55,764 INFO L85 PathProgramCache]: Analyzing trace with hash 180046649, now seen corresponding path program 1 times [2021-12-22 13:55:55,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:55,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697339586] [2021-12-22 13:55:55,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:55,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:55,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:55,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:55,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:55,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:55,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:55,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:55,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:55,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:56,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:56,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:56,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:55:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:56,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:55:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:56,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 13:55:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:56,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-22 13:55:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:56,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 13:55:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:56,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:56,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:56,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-22 13:55:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-22 13:55:56,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:56,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697339586] [2021-12-22 13:55:56,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697339586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:56,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198745995] [2021-12-22 13:55:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:56,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:56,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:56,139 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:56,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:55:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:56,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 2867 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 13:55:56,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:55:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-22 13:55:56,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:55:56,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198745995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:56,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:55:56,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-22 13:55:56,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511672084] [2021-12-22 13:55:56,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:56,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:55:56,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:55:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:55:56,804 INFO L87 Difference]: Start difference. First operand 265 states and 379 transitions. Second operand has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:55:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:56,910 INFO L93 Difference]: Finished difference Result 457 states and 652 transitions. [2021-12-22 13:55:56,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:55:56,911 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 151 [2021-12-22 13:55:56,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:56,913 INFO L225 Difference]: With dead ends: 457 [2021-12-22 13:55:56,913 INFO L226 Difference]: Without dead ends: 269 [2021-12-22 13:55:56,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:55:56,914 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 12 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:56,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1363 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:55:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-22 13:55:56,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-12-22 13:55:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 182 states have (on average 1.1538461538461537) internal successors, (210), 188 states have internal predecessors, (210), 62 states have call successors, (62), 19 states have call predecessors, (62), 24 states have return successors, (109), 61 states have call predecessors, (109), 61 states have call successors, (109) [2021-12-22 13:55:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 381 transitions. [2021-12-22 13:55:56,929 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 381 transitions. Word has length 151 [2021-12-22 13:55:56,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:56,930 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 381 transitions. [2021-12-22 13:55:56,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:55:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 381 transitions. [2021-12-22 13:55:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-22 13:55:56,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:56,933 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:56,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-22 13:55:57,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 13:55:57,151 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:57,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:57,152 INFO L85 PathProgramCache]: Analyzing trace with hash 54404409, now seen corresponding path program 2 times [2021-12-22 13:55:57,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:57,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905504031] [2021-12-22 13:55:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:57,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:55:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:55:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-22 13:55:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 13:55:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-22 13:55:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-22 13:55:57,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:57,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905504031] [2021-12-22 13:55:57,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905504031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:57,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102986349] [2021-12-22 13:55:57,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:55:57,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:57,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:57,454 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:57,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:55:58,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:55:58,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:55:58,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 2867 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 13:55:58,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:55:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-22 13:55:58,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:55:58,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102986349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:55:58,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:55:58,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-22 13:55:58,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93624915] [2021-12-22 13:55:58,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:55:58,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:55:58,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:55:58,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:55:58,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:55:58,650 INFO L87 Difference]: Start difference. First operand 269 states and 381 transitions. Second operand has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:55:58,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:55:58,770 INFO L93 Difference]: Finished difference Result 420 states and 593 transitions. [2021-12-22 13:55:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:55:58,771 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 151 [2021-12-22 13:55:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:55:58,772 INFO L225 Difference]: With dead ends: 420 [2021-12-22 13:55:58,772 INFO L226 Difference]: Without dead ends: 259 [2021-12-22 13:55:58,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:55:58,774 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 12 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:55:58,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1355 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:55:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-22 13:55:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2021-12-22 13:55:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 173 states have (on average 1.138728323699422) internal successors, (197), 178 states have internal predecessors, (197), 62 states have call successors, (62), 19 states have call predecessors, (62), 23 states have return successors, (104), 61 states have call predecessors, (104), 61 states have call successors, (104) [2021-12-22 13:55:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 363 transitions. [2021-12-22 13:55:58,789 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 363 transitions. Word has length 151 [2021-12-22 13:55:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:55:58,789 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 363 transitions. [2021-12-22 13:55:58,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:55:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 363 transitions. [2021-12-22 13:55:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-22 13:55:58,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:58,791 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:58,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:55:59,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 13:55:59,015 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:59,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1164816066, now seen corresponding path program 1 times [2021-12-22 13:55:59,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:59,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732546973] [2021-12-22 13:55:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:59,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:55:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:55:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:55:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:55:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:55:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:55:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:55:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:55:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:55:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:55:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:55:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:55:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 13:55:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:55:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:55:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-22 13:55:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:55:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-22 13:55:59,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:55:59,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732546973] [2021-12-22 13:55:59,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732546973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:55:59,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515055275] [2021-12-22 13:55:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:59,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:55:59,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:59,876 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:55:59,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:56:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 2874 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-22 13:56:00,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:00,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:56:00,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:56:00,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:56:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:56:00,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:56:00,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:56:00,781 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 13:56:00,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 53 [2021-12-22 13:56:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 130 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 13:56:01,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:56:02,187 INFO L387 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 16 [2021-12-22 13:56:02,284 INFO L353 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-22 13:56:02,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-22 13:56:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-22 13:56:02,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515055275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:56:02,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:56:02,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 13] total 36 [2021-12-22 13:56:02,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520210102] [2021-12-22 13:56:02,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:56:02,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 13:56:02,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:02,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 13:56:02,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 13:56:02,363 INFO L87 Difference]: Start difference. First operand 259 states and 363 transitions. Second operand has 36 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 14 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 14 states have call successors, (44) [2021-12-22 13:56:05,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:05,461 INFO L93 Difference]: Finished difference Result 573 states and 762 transitions. [2021-12-22 13:56:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-22 13:56:05,462 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 14 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 14 states have call successors, (44) Word has length 153 [2021-12-22 13:56:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:05,464 INFO L225 Difference]: With dead ends: 573 [2021-12-22 13:56:05,464 INFO L226 Difference]: Without dead ends: 387 [2021-12-22 13:56:05,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 331 SyntacticMatches, 15 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=707, Invalid=4260, Unknown=3, NotChecked=0, Total=4970 [2021-12-22 13:56:05,466 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 456 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 3630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1183 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:05,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 1314 Invalid, 3630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 2187 Invalid, 0 Unknown, 1183 Unchecked, 1.6s Time] [2021-12-22 13:56:05,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-22 13:56:05,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 349. [2021-12-22 13:56:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 246 states have (on average 1.113821138211382) internal successors, (274), 255 states have internal predecessors, (274), 70 states have call successors, (70), 24 states have call predecessors, (70), 32 states have return successors, (120), 69 states have call predecessors, (120), 69 states have call successors, (120) [2021-12-22 13:56:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 464 transitions. [2021-12-22 13:56:05,485 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 464 transitions. Word has length 153 [2021-12-22 13:56:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:05,485 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 464 transitions. [2021-12-22 13:56:05,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 14 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 14 states have call successors, (44) [2021-12-22 13:56:05,486 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 464 transitions. [2021-12-22 13:56:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-22 13:56:05,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:05,488 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:05,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:05,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 13:56:05,695 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:05,696 INFO L85 PathProgramCache]: Analyzing trace with hash 657359874, now seen corresponding path program 2 times [2021-12-22 13:56:05,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:05,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872548523] [2021-12-22 13:56:05,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:05,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:56:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:56:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:56:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:56:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:56:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:56:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:56:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:56:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:56:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:56:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 13:56:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:56:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 13:56:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:56:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-22 13:56:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-22 13:56:06,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:06,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872548523] [2021-12-22 13:56:06,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872548523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:06,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61840976] [2021-12-22 13:56:06,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:56:06,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:06,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:06,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:06,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:56:07,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:56:07,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:56:07,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 2874 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-22 13:56:07,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 104 proven. 22 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-22 13:56:08,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:56:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-22 13:56:09,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61840976] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:56:09,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:56:09,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 10] total 38 [2021-12-22 13:56:09,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959356793] [2021-12-22 13:56:09,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:56:09,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-22 13:56:09,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:09,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-22 13:56:09,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 13:56:09,314 INFO L87 Difference]: Start difference. First operand 349 states and 464 transitions. Second operand has 38 states, 34 states have (on average 4.764705882352941) internal successors, (162), 35 states have internal predecessors, (162), 14 states have call successors, (49), 7 states have call predecessors, (49), 7 states have return successors, (47), 10 states have call predecessors, (47), 13 states have call successors, (47) [2021-12-22 13:56:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:17,179 INFO L93 Difference]: Finished difference Result 784 states and 1174 transitions. [2021-12-22 13:56:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-22 13:56:17,179 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 4.764705882352941) internal successors, (162), 35 states have internal predecessors, (162), 14 states have call successors, (49), 7 states have call predecessors, (49), 7 states have return successors, (47), 10 states have call predecessors, (47), 13 states have call successors, (47) Word has length 153 [2021-12-22 13:56:17,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:17,183 INFO L225 Difference]: With dead ends: 784 [2021-12-22 13:56:17,184 INFO L226 Difference]: Without dead ends: 678 [2021-12-22 13:56:17,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 327 SyntacticMatches, 16 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2769 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=940, Invalid=8565, Unknown=1, NotChecked=0, Total=9506 [2021-12-22 13:56:17,186 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 530 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 6954 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 9166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 6954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1347 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:17,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 1659 Invalid, 9166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 6954 Invalid, 0 Unknown, 1347 Unchecked, 5.5s Time] [2021-12-22 13:56:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-22 13:56:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 476. [2021-12-22 13:56:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 340 states have (on average 1.1264705882352941) internal successors, (383), 350 states have internal predecessors, (383), 94 states have call successors, (94), 32 states have call predecessors, (94), 41 states have return successors, (163), 93 states have call predecessors, (163), 93 states have call successors, (163) [2021-12-22 13:56:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 640 transitions. [2021-12-22 13:56:17,232 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 640 transitions. Word has length 153 [2021-12-22 13:56:17,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:17,233 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 640 transitions. [2021-12-22 13:56:17,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 4.764705882352941) internal successors, (162), 35 states have internal predecessors, (162), 14 states have call successors, (49), 7 states have call predecessors, (49), 7 states have return successors, (47), 10 states have call predecessors, (47), 13 states have call successors, (47) [2021-12-22 13:56:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 640 transitions. [2021-12-22 13:56:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-22 13:56:17,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:17,236 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:17,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-22 13:56:17,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:17,455 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:17,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:17,456 INFO L85 PathProgramCache]: Analyzing trace with hash 126231492, now seen corresponding path program 3 times [2021-12-22 13:56:17,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:17,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702631910] [2021-12-22 13:56:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:17,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:56:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:56:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:56:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 13:56:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:56:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:56:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:56:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:56:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:56:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:56:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:56:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:56:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 13:56:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:56:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-22 13:56:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-22 13:56:18,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:18,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702631910] [2021-12-22 13:56:18,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702631910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:18,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563793860] [2021-12-22 13:56:18,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:56:18,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:18,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:18,029 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:18,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process