./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_buf_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_buf_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 13ec24500153ff48401c44b6cbf6e64bbffda498093f21927cfcfb52ad2376ab --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:03:25,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:03:25,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:03:25,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:03:25,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:03:25,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:03:25,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:03:25,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:03:25,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:03:25,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:03:25,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:03:25,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:03:25,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:03:25,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:03:25,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:03:25,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:03:25,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:03:25,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:03:25,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:03:25,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:03:25,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:03:25,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:03:25,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:03:25,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:03:25,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:03:25,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:03:25,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:03:25,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:03:25,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:03:25,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:03:25,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:03:25,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:03:25,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:03:25,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:03:25,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:03:25,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:03:25,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:03:25,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:03:25,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:03:25,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:03:25,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:03:25,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:03:25,637 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:03:25,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:03:25,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:03:25,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:03:25,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:03:25,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:03:25,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:03:25,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:03:25,640 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:03:25,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:03:25,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:03:25,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:03:25,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:03:25,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:03:25,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:03:25,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:03:25,641 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:03:25,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:03:25,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:03:25,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:03:25,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:03:25,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:03:25,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:03:25,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:03:25,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:03:25,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:03:25,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:03:25,642 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:03:25,643 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:03:25,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:03:25,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:03:25,643 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ec24500153ff48401c44b6cbf6e64bbffda498093f21927cfcfb52ad2376ab [2021-12-14 17:03:25,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:03:25,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:03:25,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:03:25,865 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:03:25,865 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:03:25,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_buf_harness.i [2021-12-14 17:03:25,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12329c855/7f02cf6e5f144c37b422640d2689c82f/FLAGfeb1e8dbc [2021-12-14 17:03:26,483 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:03:26,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_buf_harness.i [2021-12-14 17:03:26,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12329c855/7f02cf6e5f144c37b422640d2689c82f/FLAGfeb1e8dbc [2021-12-14 17:03:26,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12329c855/7f02cf6e5f144c37b422640d2689c82f [2021-12-14 17:03:26,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:03:26,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:03:26,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:03:26,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:03:26,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:03:26,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:03:26" (1/1) ... [2021-12-14 17:03:26,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c9a059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:26, skipping insertion in model container [2021-12-14 17:03:26,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:03:26" (1/1) ... [2021-12-14 17:03:26,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:03:27,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:03:27,203 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_cursor_from_buf_harness.i[4498,4511] [2021-12-14 17:03:27,207 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_cursor_from_buf_harness.i[4558,4571] [2021-12-14 17:03:27,701 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:27,702 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:27,702 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:27,703 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:27,703 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:27,714 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:27,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:27,716 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:27,716 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:27,904 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:03:27,905 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:03:27,906 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:03:27,907 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:03:27,909 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:03:27,911 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:03:27,912 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:03:27,913 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:03:27,914 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:03:27,915 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:03:28,014 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:03:28,111 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,112 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:03:28,181 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:03:28,195 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_cursor_from_buf_harness.i[4498,4511] [2021-12-14 17:03:28,195 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_cursor_from_buf_harness.i[4558,4571] [2021-12-14 17:03:28,221 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,222 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,222 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,222 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,223 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,227 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,227 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,228 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,229 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,249 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:03:28,250 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:03:28,250 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:03:28,251 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:03:28,251 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:03:28,252 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:03:28,252 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:03:28,253 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:03:28,253 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:03:28,253 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:03:28,273 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:03:28,358 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,358 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:28,390 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:03:28,563 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:03:28,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:28 WrapperNode [2021-12-14 17:03:28,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:03:28,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:03:28,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:03:28,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:03:28,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:28" (1/1) ... [2021-12-14 17:03:28,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:28" (1/1) ... [2021-12-14 17:03:28,744 INFO L137 Inliner]: procedures = 690, calls = 2639, calls flagged for inlining = 61, calls inlined = 9, statements flattened = 868 [2021-12-14 17:03:28,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:03:28,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:03:28,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:03:28,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:03:28,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:28" (1/1) ... [2021-12-14 17:03:28,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:28" (1/1) ... [2021-12-14 17:03:28,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:28" (1/1) ... [2021-12-14 17:03:28,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:28" (1/1) ... [2021-12-14 17:03:28,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:28" (1/1) ... [2021-12-14 17:03:28,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:28" (1/1) ... [2021-12-14 17:03:28,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:28" (1/1) ... [2021-12-14 17:03:28,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:03:28,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:03:28,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:03:28,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:03:28,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:28" (1/1) ... [2021-12-14 17:03:28,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:03:28,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:28,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 17:03:28,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:03:28,932 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-14 17:03:28,932 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-14 17:03:28,932 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-14 17:03:28,933 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-14 17:03:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:03:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-14 17:03:28,933 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-14 17:03:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:03:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:03:28,934 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:03:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_from_buf [2021-12-14 17:03:28,936 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_from_buf [2021-12-14 17:03:28,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:03:28,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:03:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:03:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:03:28,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:03:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-14 17:03:28,938 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-14 17:03:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-14 17:03:28,938 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-14 17:03:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:03:28,938 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:03:28,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:03:28,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:03:28,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:03:28,940 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-14 17:03:28,940 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-14 17:03:28,940 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-14 17:03:28,941 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-14 17:03:28,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:03:28,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:03:29,164 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:03:29,166 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:03:29,920 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:03:29,927 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:03:29,927 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:03:29,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:03:29 BoogieIcfgContainer [2021-12-14 17:03:29,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:03:29,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:03:29,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:03:29,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:03:29,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:03:26" (1/3) ... [2021-12-14 17:03:29,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75dc054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:03:29, skipping insertion in model container [2021-12-14 17:03:29,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:28" (2/3) ... [2021-12-14 17:03:29,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75dc054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:03:29, skipping insertion in model container [2021-12-14 17:03:29,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:03:29" (3/3) ... [2021-12-14 17:03:29,936 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_from_buf_harness.i [2021-12-14 17:03:29,939 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:03:29,940 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:03:29,996 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:03:30,000 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:03:30,000 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:03:30,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 88 states have (on average 1.25) internal successors, (110), 89 states have internal predecessors, (110), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-14 17:03:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 17:03:30,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:30,021 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:30,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:30,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash -963084782, now seen corresponding path program 1 times [2021-12-14 17:03:30,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:30,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551483158] [2021-12-14 17:03:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:30,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:30,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:30,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:30,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:30,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:30,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:30,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:03:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:30,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:30,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:30,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-14 17:03:30,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:30,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551483158] [2021-12-14 17:03:30,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551483158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:30,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:03:30,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 17:03:30,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591556852] [2021-12-14 17:03:30,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:30,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:03:30,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:30,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:03:30,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:03:30,656 INFO L87 Difference]: Start difference. First operand has 128 states, 88 states have (on average 1.25) internal successors, (110), 89 states have internal predecessors, (110), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 17:03:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:30,881 INFO L93 Difference]: Finished difference Result 252 states and 347 transitions. [2021-12-14 17:03:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:03:30,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-12-14 17:03:30,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:30,890 INFO L225 Difference]: With dead ends: 252 [2021-12-14 17:03:30,890 INFO L226 Difference]: Without dead ends: 121 [2021-12-14 17:03:30,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:03:30,895 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 61 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:30,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 199 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:03:30,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-14 17:03:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-14 17:03:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 83 states have internal predecessors, (100), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-14 17:03:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 155 transitions. [2021-12-14 17:03:30,929 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 155 transitions. Word has length 65 [2021-12-14 17:03:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:30,929 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 155 transitions. [2021-12-14 17:03:30,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 17:03:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 155 transitions. [2021-12-14 17:03:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 17:03:30,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:30,932 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:30,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:03:30,933 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:30,933 INFO L85 PathProgramCache]: Analyzing trace with hash 178526858, now seen corresponding path program 1 times [2021-12-14 17:03:30,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:30,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843297401] [2021-12-14 17:03:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:30,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:31,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:31,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:31,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:31,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:31,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:31,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:03:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:31,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:31,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:31,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 17:03:31,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:31,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843297401] [2021-12-14 17:03:31,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843297401] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:31,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214742708] [2021-12-14 17:03:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:31,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:31,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:31,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:31,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:03:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:31,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 17:03:31,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-14 17:03:31,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:31,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214742708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:31,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:31,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-14 17:03:31,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436931209] [2021-12-14 17:03:31,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:31,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:03:31,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:31,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:03:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:03:31,932 INFO L87 Difference]: Start difference. First operand 121 states and 155 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 17:03:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:31,998 INFO L93 Difference]: Finished difference Result 207 states and 266 transitions. [2021-12-14 17:03:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:03:31,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-12-14 17:03:32,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:32,001 INFO L225 Difference]: With dead ends: 207 [2021-12-14 17:03:32,002 INFO L226 Difference]: Without dead ends: 124 [2021-12-14 17:03:32,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:03:32,003 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 128 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:32,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 427 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:03:32,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-14 17:03:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-14 17:03:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 86 states have internal predecessors, (102), 28 states have call successors, (28), 10 states have call predecessors, (28), 11 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-12-14 17:03:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-12-14 17:03:32,014 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 65 [2021-12-14 17:03:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:32,014 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-12-14 17:03:32,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 17:03:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-12-14 17:03:32,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 17:03:32,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:32,016 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-14 17:03:32,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:32,230 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 [2021-12-14 17:03:32,231 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:32,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1400320561, now seen corresponding path program 1 times [2021-12-14 17:03:32,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:32,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62735979] [2021-12-14 17:03:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:32,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:32,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:32,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:32,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:32,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:32,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:32,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:03:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:32,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:32,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:32,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 17:03:32,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:32,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62735979] [2021-12-14 17:03:32,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62735979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:32,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547037148] [2021-12-14 17:03:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:32,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:32,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:32,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:32,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:03:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:32,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 2576 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 17:03:32,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 17:03:32,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:32,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547037148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:32,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:32,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-14 17:03:32,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630748726] [2021-12-14 17:03:32,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:32,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:03:32,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:32,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:03:32,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:03:32,944 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:03:33,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:33,089 INFO L93 Difference]: Finished difference Result 226 states and 292 transitions. [2021-12-14 17:03:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:03:33,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 67 [2021-12-14 17:03:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:33,091 INFO L225 Difference]: With dead ends: 226 [2021-12-14 17:03:33,091 INFO L226 Difference]: Without dead ends: 127 [2021-12-14 17:03:33,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:03:33,093 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 181 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:33,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 435 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:03:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-14 17:03:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-14 17:03:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 89 states have internal predecessors, (104), 28 states have call successors, (28), 10 states have call predecessors, (28), 12 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-14 17:03:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 161 transitions. [2021-12-14 17:03:33,100 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 161 transitions. Word has length 67 [2021-12-14 17:03:33,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:33,101 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 161 transitions. [2021-12-14 17:03:33,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:03:33,101 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 161 transitions. [2021-12-14 17:03:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 17:03:33,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:33,102 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-14 17:03:33,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:33,315 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 [2021-12-14 17:03:33,315 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:33,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1731830746, now seen corresponding path program 1 times [2021-12-14 17:03:33,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:33,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804256585] [2021-12-14 17:03:33,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:33,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:33,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:33,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:33,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:33,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:33,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:33,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:03:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:33,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:33,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:33,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:03:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 17:03:33,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:33,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804256585] [2021-12-14 17:03:33,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804256585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:33,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540120201] [2021-12-14 17:03:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:33,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:33,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:33,611 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:33,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:03:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:33,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 2593 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:03:33,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 17:03:34,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:34,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540120201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:34,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:34,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-12-14 17:03:34,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438678220] [2021-12-14 17:03:34,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:34,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:03:34,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:34,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:03:34,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:03:34,195 INFO L87 Difference]: Start difference. First operand 127 states and 161 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-14 17:03:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:34,422 INFO L93 Difference]: Finished difference Result 219 states and 278 transitions. [2021-12-14 17:03:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:03:34,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2021-12-14 17:03:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:34,424 INFO L225 Difference]: With dead ends: 219 [2021-12-14 17:03:34,424 INFO L226 Difference]: Without dead ends: 124 [2021-12-14 17:03:34,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-14 17:03:34,425 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 180 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:34,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 650 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:03:34,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-14 17:03:34,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-14 17:03:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 28 states have call successors, (28), 10 states have call predecessors, (28), 11 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-12-14 17:03:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 157 transitions. [2021-12-14 17:03:34,432 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 157 transitions. Word has length 73 [2021-12-14 17:03:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:34,433 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 157 transitions. [2021-12-14 17:03:34,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-14 17:03:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 157 transitions. [2021-12-14 17:03:34,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 17:03:34,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:34,434 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:03:34,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:34,642 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 [2021-12-14 17:03:34,642 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1300692571, now seen corresponding path program 1 times [2021-12-14 17:03:34,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:34,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009627270] [2021-12-14 17:03:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:34,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:34,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:34,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:34,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:34,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:34,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:34,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:03:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:34,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:34,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:03:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:34,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:03:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 17:03:34,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009627270] [2021-12-14 17:03:34,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009627270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:34,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:03:34,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:03:34,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28838250] [2021-12-14 17:03:34,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:34,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:03:34,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:34,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:03:34,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:03:34,898 INFO L87 Difference]: Start difference. First operand 124 states and 157 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-14 17:03:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:35,234 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2021-12-14 17:03:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:03:35,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 79 [2021-12-14 17:03:35,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:35,235 INFO L225 Difference]: With dead ends: 136 [2021-12-14 17:03:35,235 INFO L226 Difference]: Without dead ends: 134 [2021-12-14 17:03:35,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:03:35,237 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 79 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:35,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 715 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 17:03:35,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-14 17:03:35,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-14 17:03:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 93 states have internal predecessors, (107), 29 states have call successors, (29), 11 states have call predecessors, (29), 13 states have return successors, (31), 28 states have call predecessors, (31), 28 states have call successors, (31) [2021-12-14 17:03:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2021-12-14 17:03:35,244 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 79 [2021-12-14 17:03:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:35,244 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2021-12-14 17:03:35,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-14 17:03:35,245 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2021-12-14 17:03:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-14 17:03:35,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:35,246 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:03:35,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:03:35,246 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:35,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:35,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1177544493, now seen corresponding path program 1 times [2021-12-14 17:03:35,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:35,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602384810] [2021-12-14 17:03:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:35,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:35,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:35,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:35,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:35,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:35,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:35,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:03:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:35,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:35,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:03:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:35,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:03:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 17:03:35,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:35,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602384810] [2021-12-14 17:03:35,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602384810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:35,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:03:35,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-14 17:03:35,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200975621] [2021-12-14 17:03:35,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:35,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 17:03:35,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:35,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 17:03:35,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:03:35,768 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 18 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 17:03:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:36,791 INFO L93 Difference]: Finished difference Result 264 states and 343 transitions. [2021-12-14 17:03:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 17:03:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 83 [2021-12-14 17:03:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:36,793 INFO L225 Difference]: With dead ends: 264 [2021-12-14 17:03:36,794 INFO L226 Difference]: Without dead ends: 174 [2021-12-14 17:03:36,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-12-14 17:03:36,795 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 214 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:36,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 694 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 17:03:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-14 17:03:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 144. [2021-12-14 17:03:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 99 states have internal predecessors, (112), 34 states have call successors, (34), 12 states have call predecessors, (34), 14 states have return successors, (36), 32 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-14 17:03:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 182 transitions. [2021-12-14 17:03:36,805 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 182 transitions. Word has length 83 [2021-12-14 17:03:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:36,806 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 182 transitions. [2021-12-14 17:03:36,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 17:03:36,806 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 182 transitions. [2021-12-14 17:03:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 17:03:36,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:36,807 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:03:36,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:03:36,807 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash 340573773, now seen corresponding path program 1 times [2021-12-14 17:03:36,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:36,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309333427] [2021-12-14 17:03:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:36,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:36,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:36,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:36,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:36,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:36,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:03:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:03:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:03:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:03:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:03:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-14 17:03:37,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:37,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309333427] [2021-12-14 17:03:37,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309333427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:37,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151851061] [2021-12-14 17:03:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:37,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:37,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:37,121 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:37,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:03:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 17:03:37,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:37,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:03:37,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-14 17:03:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 17:03:37,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:37,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151851061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:37,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:37,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 15 [2021-12-14 17:03:37,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992812073] [2021-12-14 17:03:37,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:37,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 17:03:37,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:37,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 17:03:37,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:03:37,936 INFO L87 Difference]: Start difference. First operand 144 states and 182 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:03:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:38,535 INFO L93 Difference]: Finished difference Result 368 states and 498 transitions. [2021-12-14 17:03:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 17:03:38,536 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 90 [2021-12-14 17:03:38,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:38,538 INFO L225 Difference]: With dead ends: 368 [2021-12-14 17:03:38,538 INFO L226 Difference]: Without dead ends: 263 [2021-12-14 17:03:38,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-12-14 17:03:38,539 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 306 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:38,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1251 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 517 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2021-12-14 17:03:38,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-14 17:03:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 165. [2021-12-14 17:03:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 113 states have (on average 1.1946902654867257) internal successors, (135), 117 states have internal predecessors, (135), 35 states have call successors, (35), 13 states have call predecessors, (35), 16 states have return successors, (41), 34 states have call predecessors, (41), 34 states have call successors, (41) [2021-12-14 17:03:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 211 transitions. [2021-12-14 17:03:38,550 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 211 transitions. Word has length 90 [2021-12-14 17:03:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:38,551 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 211 transitions. [2021-12-14 17:03:38,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:03:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 211 transitions. [2021-12-14 17:03:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 17:03:38,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:38,552 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:03:38,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:38,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:38,772 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash 774302859, now seen corresponding path program 1 times [2021-12-14 17:03:38,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:38,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131987205] [2021-12-14 17:03:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:38,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:03:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:03:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:03:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:03:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:03:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 17:03:38,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:38,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131987205] [2021-12-14 17:03:38,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131987205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:38,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567474878] [2021-12-14 17:03:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:38,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:38,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:38,925 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) [2021-12-14 17:03:38,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 17:03:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:03:39,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 17:03:39,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:39,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567474878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:39,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:39,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:03:39,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229612624] [2021-12-14 17:03:39,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:39,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:03:39,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:39,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:03:39,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:03:39,408 INFO L87 Difference]: Start difference. First operand 165 states and 211 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:03:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:39,433 INFO L93 Difference]: Finished difference Result 308 states and 405 transitions. [2021-12-14 17:03:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:03:39,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 90 [2021-12-14 17:03:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:39,435 INFO L225 Difference]: With dead ends: 308 [2021-12-14 17:03:39,435 INFO L226 Difference]: Without dead ends: 175 [2021-12-14 17:03:39,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:03:39,436 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 20 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 454 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 [2021-12-14 17:03:39,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 454 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:03:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-14 17:03:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 167. [2021-12-14 17:03:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 115 states have (on average 1.191304347826087) internal successors, (137), 119 states have internal predecessors, (137), 35 states have call successors, (35), 13 states have call predecessors, (35), 16 states have return successors, (41), 34 states have call predecessors, (41), 34 states have call successors, (41) [2021-12-14 17:03:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2021-12-14 17:03:39,448 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 90 [2021-12-14 17:03:39,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:39,448 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2021-12-14 17:03:39,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:03:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2021-12-14 17:03:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 17:03:39,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:39,450 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:03:39,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:39,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:39,653 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:39,653 INFO L85 PathProgramCache]: Analyzing trace with hash 542397707, now seen corresponding path program 1 times [2021-12-14 17:03:39,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:39,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843908540] [2021-12-14 17:03:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:39,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:03:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:03:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:03:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:03:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:03:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-14 17:03:39,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:39,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843908540] [2021-12-14 17:03:39,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843908540] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:39,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993531570] [2021-12-14 17:03:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:39,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:39,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:39,778 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) [2021-12-14 17:03:39,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 17:03:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:03:40,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 17:03:40,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:40,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993531570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:40,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:40,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:03:40,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794753875] [2021-12-14 17:03:40,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:40,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:03:40,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:40,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:03:40,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:03:40,292 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:03:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:40,311 INFO L93 Difference]: Finished difference Result 310 states and 405 transitions. [2021-12-14 17:03:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:03:40,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 90 [2021-12-14 17:03:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:40,313 INFO L225 Difference]: With dead ends: 310 [2021-12-14 17:03:40,313 INFO L226 Difference]: Without dead ends: 175 [2021-12-14 17:03:40,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:03:40,314 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 26 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:40,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 487 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:03:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-14 17:03:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2021-12-14 17:03:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 113 states have (on average 1.176991150442478) internal successors, (133), 117 states have internal predecessors, (133), 35 states have call successors, (35), 13 states have call predecessors, (35), 16 states have return successors, (41), 34 states have call predecessors, (41), 34 states have call successors, (41) [2021-12-14 17:03:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 209 transitions. [2021-12-14 17:03:40,324 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 209 transitions. Word has length 90 [2021-12-14 17:03:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:40,324 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 209 transitions. [2021-12-14 17:03:40,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:03:40,325 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 209 transitions. [2021-12-14 17:03:40,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-14 17:03:40,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:40,326 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:03:40,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:40,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:40,539 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:40,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:40,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1365921731, now seen corresponding path program 1 times [2021-12-14 17:03:40,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:40,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523698346] [2021-12-14 17:03:40,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:40,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:03:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:03:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:03:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:03:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-14 17:03:40,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:40,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523698346] [2021-12-14 17:03:40,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523698346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:40,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:03:40,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-14 17:03:40,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850935336] [2021-12-14 17:03:40,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:40,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 17:03:40,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:40,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 17:03:40,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:03:40,980 INFO L87 Difference]: Start difference. First operand 165 states and 209 transitions. Second operand has 18 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 6 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:03:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:41,809 INFO L93 Difference]: Finished difference Result 279 states and 356 transitions. [2021-12-14 17:03:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 17:03:41,809 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 6 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 94 [2021-12-14 17:03:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:41,810 INFO L225 Difference]: With dead ends: 279 [2021-12-14 17:03:41,811 INFO L226 Difference]: Without dead ends: 175 [2021-12-14 17:03:41,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-12-14 17:03:41,812 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 243 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:41,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 735 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 17:03:41,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-14 17:03:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 168. [2021-12-14 17:03:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 118 states have internal predecessors, (134), 37 states have call successors, (37), 13 states have call predecessors, (37), 16 states have return successors, (43), 36 states have call predecessors, (43), 36 states have call successors, (43) [2021-12-14 17:03:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 214 transitions. [2021-12-14 17:03:41,822 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 214 transitions. Word has length 94 [2021-12-14 17:03:41,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:41,823 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 214 transitions. [2021-12-14 17:03:41,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 6 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:03:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 214 transitions. [2021-12-14 17:03:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-14 17:03:41,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:41,826 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:41,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 17:03:41,826 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:41,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2135201293, now seen corresponding path program 1 times [2021-12-14 17:03:41,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:41,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451417921] [2021-12-14 17:03:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:41,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:41,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:41,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:41,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:41,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:42,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:42,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:42,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:03:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:42,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:03:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:42,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:03:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:42,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:03:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-14 17:03:42,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:42,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451417921] [2021-12-14 17:03:42,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451417921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:42,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787987051] [2021-12-14 17:03:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:42,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:42,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:42,087 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) [2021-12-14 17:03:42,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 17:03:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:42,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:03:42,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 17:03:42,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:42,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787987051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:42,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:42,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-14 17:03:42,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947225167] [2021-12-14 17:03:42,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:42,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:03:42,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:42,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:03:42,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:03:42,607 INFO L87 Difference]: Start difference. First operand 168 states and 214 transitions. Second operand has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 17:03:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:42,685 INFO L93 Difference]: Finished difference Result 317 states and 411 transitions. [2021-12-14 17:03:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:03:42,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 98 [2021-12-14 17:03:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:42,686 INFO L225 Difference]: With dead ends: 317 [2021-12-14 17:03:42,686 INFO L226 Difference]: Without dead ends: 178 [2021-12-14 17:03:42,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:03:42,687 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 12 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:42,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1163 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:03:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-14 17:03:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-12-14 17:03:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 128 states have internal predecessors, (142), 37 states have call successors, (37), 13 states have call predecessors, (37), 18 states have return successors, (49), 36 states have call predecessors, (49), 36 states have call successors, (49) [2021-12-14 17:03:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 228 transitions. [2021-12-14 17:03:42,695 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 228 transitions. Word has length 98 [2021-12-14 17:03:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:42,695 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 228 transitions. [2021-12-14 17:03:42,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 17:03:42,696 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 228 transitions. [2021-12-14 17:03:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-14 17:03:42,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:42,697 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:42,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:42,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:42,911 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:42,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1638074292, now seen corresponding path program 1 times [2021-12-14 17:03:42,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:42,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718873607] [2021-12-14 17:03:42,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:42,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:03:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:03:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:03:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:03:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:03:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-14 17:03:43,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:43,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718873607] [2021-12-14 17:03:43,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718873607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:43,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:03:43,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 17:03:43,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894823080] [2021-12-14 17:03:43,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:43,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 17:03:43,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:43,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 17:03:43,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:03:43,181 INFO L87 Difference]: Start difference. First operand 178 states and 228 transitions. Second operand has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 17:03:43,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:43,648 INFO L93 Difference]: Finished difference Result 190 states and 243 transitions. [2021-12-14 17:03:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:03:43,649 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 100 [2021-12-14 17:03:43,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:43,650 INFO L225 Difference]: With dead ends: 190 [2021-12-14 17:03:43,650 INFO L226 Difference]: Without dead ends: 188 [2021-12-14 17:03:43,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:03:43,651 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 83 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:43,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 708 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 17:03:43,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-14 17:03:43,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-12-14 17:03:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 128 states have (on average 1.15625) internal successors, (148), 135 states have internal predecessors, (148), 38 states have call successors, (38), 14 states have call predecessors, (38), 20 states have return successors, (54), 37 states have call predecessors, (54), 37 states have call successors, (54) [2021-12-14 17:03:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 240 transitions. [2021-12-14 17:03:43,677 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 240 transitions. Word has length 100 [2021-12-14 17:03:43,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:43,678 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 240 transitions. [2021-12-14 17:03:43,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 17:03:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 240 transitions. [2021-12-14 17:03:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-14 17:03:43,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:43,680 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:03:43,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 17:03:43,681 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash 827921064, now seen corresponding path program 1 times [2021-12-14 17:03:43,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:43,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822623389] [2021-12-14 17:03:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:43,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:03:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:03:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:03:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:03:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:03:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-14 17:03:44,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:44,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822623389] [2021-12-14 17:03:44,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822623389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:44,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:03:44,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 17:03:44,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197177768] [2021-12-14 17:03:44,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:44,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 17:03:44,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 17:03:44,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:03:44,003 INFO L87 Difference]: Start difference. First operand 187 states and 240 transitions. Second operand has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 17:03:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:44,428 INFO L93 Difference]: Finished difference Result 328 states and 415 transitions. [2021-12-14 17:03:44,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:03:44,429 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2021-12-14 17:03:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:44,430 INFO L225 Difference]: With dead ends: 328 [2021-12-14 17:03:44,430 INFO L226 Difference]: Without dead ends: 187 [2021-12-14 17:03:44,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:03:44,431 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 72 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:44,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 781 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 17:03:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-14 17:03:44,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2021-12-14 17:03:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 130 states have internal predecessors, (144), 38 states have call successors, (38), 14 states have call predecessors, (38), 19 states have return successors, (49), 37 states have call predecessors, (49), 37 states have call successors, (49) [2021-12-14 17:03:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 231 transitions. [2021-12-14 17:03:44,443 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 231 transitions. Word has length 100 [2021-12-14 17:03:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:44,444 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 231 transitions. [2021-12-14 17:03:44,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 17:03:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 231 transitions. [2021-12-14 17:03:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 17:03:44,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:44,446 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:44,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 17:03:44,446 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:44,447 INFO L85 PathProgramCache]: Analyzing trace with hash 358096301, now seen corresponding path program 1 times [2021-12-14 17:03:44,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:44,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787103345] [2021-12-14 17:03:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:44,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:03:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:03:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:03:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:03:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:03:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 17:03:44,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:44,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787103345] [2021-12-14 17:03:44,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787103345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:44,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666865018] [2021-12-14 17:03:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:44,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:44,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:44,691 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) [2021-12-14 17:03:44,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 17:03:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 2691 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 17:03:45,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 17:03:45,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:45,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666865018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:45,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:45,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-14 17:03:45,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179049119] [2021-12-14 17:03:45,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:45,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:03:45,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:45,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:03:45,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:03:45,302 INFO L87 Difference]: Start difference. First operand 182 states and 231 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:03:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:45,490 INFO L93 Difference]: Finished difference Result 352 states and 456 transitions. [2021-12-14 17:03:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:03:45,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 102 [2021-12-14 17:03:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:45,491 INFO L225 Difference]: With dead ends: 352 [2021-12-14 17:03:45,491 INFO L226 Difference]: Without dead ends: 202 [2021-12-14 17:03:45,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:03:45,492 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 34 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:45,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 659 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-12-14 17:03:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-14 17:03:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 188. [2021-12-14 17:03:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 136 states have internal predecessors, (152), 38 states have call successors, (38), 14 states have call predecessors, (38), 19 states have return successors, (49), 37 states have call predecessors, (49), 37 states have call successors, (49) [2021-12-14 17:03:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 239 transitions. [2021-12-14 17:03:45,501 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 239 transitions. Word has length 102 [2021-12-14 17:03:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:45,501 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 239 transitions. [2021-12-14 17:03:45,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:03:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 239 transitions. [2021-12-14 17:03:45,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 17:03:45,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:45,503 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:45,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:45,724 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,SelfDestructingSolverStorable13 [2021-12-14 17:03:45,724 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:45,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1689906797, now seen corresponding path program 1 times [2021-12-14 17:03:45,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:45,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415365056] [2021-12-14 17:03:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:45,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:03:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:03:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:03:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:03:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:03:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 17:03:45,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:45,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415365056] [2021-12-14 17:03:45,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415365056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:45,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949032460] [2021-12-14 17:03:45,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:45,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:45,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:46,000 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) [2021-12-14 17:03:46,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 17:03:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:46,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 2701 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:03:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 17:03:46,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:46,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949032460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:46,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:46,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-12-14 17:03:46,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759128077] [2021-12-14 17:03:46,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:46,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:03:46,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:46,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:03:46,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:03:46,602 INFO L87 Difference]: Start difference. First operand 188 states and 239 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:03:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:46,706 INFO L93 Difference]: Finished difference Result 358 states and 465 transitions. [2021-12-14 17:03:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:03:46,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 102 [2021-12-14 17:03:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:46,707 INFO L225 Difference]: With dead ends: 358 [2021-12-14 17:03:46,707 INFO L226 Difference]: Without dead ends: 195 [2021-12-14 17:03:46,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:03:46,708 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 21 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:46,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 532 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-12-14 17:03:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-14 17:03:46,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 188. [2021-12-14 17:03:46,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 130 states have (on average 1.1538461538461537) internal successors, (150), 136 states have internal predecessors, (150), 38 states have call successors, (38), 14 states have call predecessors, (38), 19 states have return successors, (49), 37 states have call predecessors, (49), 37 states have call successors, (49) [2021-12-14 17:03:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 237 transitions. [2021-12-14 17:03:46,716 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 237 transitions. Word has length 102 [2021-12-14 17:03:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:46,716 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 237 transitions. [2021-12-14 17:03:46,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:03:46,719 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 237 transitions. [2021-12-14 17:03:46,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 17:03:46,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:46,720 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:46,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:46,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 17:03:46,931 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:46,932 INFO L85 PathProgramCache]: Analyzing trace with hash 748512685, now seen corresponding path program 1 times [2021-12-14 17:03:46,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:46,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044638044] [2021-12-14 17:03:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:46,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:46,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:46,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:03:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:03:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:03:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:03:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:03:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-14 17:03:47,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:47,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044638044] [2021-12-14 17:03:47,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044638044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:47,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724641465] [2021-12-14 17:03:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:47,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:47,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:47,059 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) [2021-12-14 17:03:47,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 17:03:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 2691 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:03:47,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-14 17:03:47,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:47,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724641465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:47,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:47,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:03:47,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399797813] [2021-12-14 17:03:47,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:47,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:03:47,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:03:47,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:03:47,616 INFO L87 Difference]: Start difference. First operand 188 states and 237 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:03:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:47,637 INFO L93 Difference]: Finished difference Result 348 states and 447 transitions. [2021-12-14 17:03:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:03:47,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 102 [2021-12-14 17:03:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:47,638 INFO L225 Difference]: With dead ends: 348 [2021-12-14 17:03:47,638 INFO L226 Difference]: Without dead ends: 185 [2021-12-14 17:03:47,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:03:47,639 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 9 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 450 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 [2021-12-14 17:03:47,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 450 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:03:47,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-14 17:03:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 177. [2021-12-14 17:03:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 125 states have internal predecessors, (137), 38 states have call successors, (38), 14 states have call predecessors, (38), 18 states have return successors, (45), 37 states have call predecessors, (45), 37 states have call successors, (45) [2021-12-14 17:03:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 220 transitions. [2021-12-14 17:03:47,648 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 220 transitions. Word has length 102 [2021-12-14 17:03:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:47,648 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 220 transitions. [2021-12-14 17:03:47,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:03:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 220 transitions. [2021-12-14 17:03:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 17:03:47,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:47,651 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:47,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:47,868 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,SelfDestructingSolverStorable15 [2021-12-14 17:03:47,868 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1094528621, now seen corresponding path program 1 times [2021-12-14 17:03:47,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:47,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9016895] [2021-12-14 17:03:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:47,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:48,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:48,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:48,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:48,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:03:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:48,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:03:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:48,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:03:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:48,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:03:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:48,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:03:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-14 17:03:48,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:48,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9016895] [2021-12-14 17:03:48,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9016895] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:48,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775058117] [2021-12-14 17:03:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:48,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:48,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:48,137 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) [2021-12-14 17:03:48,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 17:03:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:48,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 17:03:48,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:48,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-14 17:03:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 17:03:48,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:48,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775058117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:48,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:48,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 14 [2021-12-14 17:03:48,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697287887] [2021-12-14 17:03:48,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:48,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:03:48,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:48,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:03:48,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:03:48,873 INFO L87 Difference]: Start difference. First operand 177 states and 220 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 8 states have internal predecessors, (74), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 17:03:49,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:49,317 INFO L93 Difference]: Finished difference Result 410 states and 542 transitions. [2021-12-14 17:03:49,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:03:49,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 8 states have internal predecessors, (74), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2021-12-14 17:03:49,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:49,319 INFO L225 Difference]: With dead ends: 410 [2021-12-14 17:03:49,320 INFO L226 Difference]: Without dead ends: 279 [2021-12-14 17:03:49,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:03:49,320 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 95 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:49,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1300 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 382 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2021-12-14 17:03:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-14 17:03:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2021-12-14 17:03:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 125 states have (on average 1.136) internal successors, (142), 131 states have internal predecessors, (142), 38 states have call successors, (38), 14 states have call predecessors, (38), 19 states have return successors, (49), 37 states have call predecessors, (49), 37 states have call successors, (49) [2021-12-14 17:03:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 229 transitions. [2021-12-14 17:03:49,333 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 229 transitions. Word has length 102 [2021-12-14 17:03:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:49,333 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 229 transitions. [2021-12-14 17:03:49,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 8 states have internal predecessors, (74), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 17:03:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 229 transitions. [2021-12-14 17:03:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 17:03:49,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:49,335 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:49,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:49,555 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,SelfDestructingSolverStorable16 [2021-12-14 17:03:49,555 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:49,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1040135723, now seen corresponding path program 1 times [2021-12-14 17:03:49,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:49,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393420470] [2021-12-14 17:03:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:49,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:49,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:49,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:49,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:49,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:49,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:49,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:03:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:49,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:03:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:49,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:03:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:50,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:03:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:50,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:03:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-14 17:03:50,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:50,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393420470] [2021-12-14 17:03:50,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393420470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:50,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937308912] [2021-12-14 17:03:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:50,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:50,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:50,095 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) [2021-12-14 17:03:50,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 17:03:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 2690 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-14 17:03:50,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:52,866 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-14 17:03:52,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-12-14 17:03:52,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2021-12-14 17:03:53,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:03:53,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:03:53,269 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-14 17:03:53,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 33 [2021-12-14 17:03:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-14 17:03:53,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:03:55,435 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1673 Int) (|v_aws_byte_cursor_from_buf_~#cur~0.base_7| Int)) (= (mod (select (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_7| (store (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_7|) 8 v_ArrVal_1673)) c_aws_byte_cursor_from_buf_~buf.base) c_aws_byte_cursor_from_buf_~buf.offset) 18446744073709551616) 0)) is different from false [2021-12-14 17:03:55,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937308912] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:55,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:03:55,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2021-12-14 17:03:55,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277220186] [2021-12-14 17:03:55,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:03:55,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 17:03:55,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:55,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 17:03:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1296, Unknown=2, NotChecked=72, Total=1482 [2021-12-14 17:03:55,445 INFO L87 Difference]: Start difference. First operand 183 states and 229 transitions. Second operand has 34 states, 31 states have (on average 3.129032258064516) internal successors, (97), 27 states have internal predecessors, (97), 15 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (20), 11 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-14 17:03:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:58,242 INFO L93 Difference]: Finished difference Result 454 states and 583 transitions. [2021-12-14 17:03:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-14 17:03:58,243 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 3.129032258064516) internal successors, (97), 27 states have internal predecessors, (97), 15 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (20), 11 states have call predecessors, (20), 14 states have call successors, (20) Word has length 102 [2021-12-14 17:03:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:58,245 INFO L225 Difference]: With dead ends: 454 [2021-12-14 17:03:58,245 INFO L226 Difference]: Without dead ends: 308 [2021-12-14 17:03:58,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 126 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=350, Invalid=3684, Unknown=2, NotChecked=124, Total=4160 [2021-12-14 17:03:58,247 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 346 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 3169 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 4377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 3169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 999 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:58,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1530 Invalid, 4377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 3169 Invalid, 0 Unknown, 999 Unchecked, 1.9s Time] [2021-12-14 17:03:58,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-14 17:03:58,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 239. [2021-12-14 17:03:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 168 states have (on average 1.130952380952381) internal successors, (190), 175 states have internal predecessors, (190), 46 states have call successors, (46), 19 states have call predecessors, (46), 24 states have return successors, (59), 44 states have call predecessors, (59), 45 states have call successors, (59) [2021-12-14 17:03:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 295 transitions. [2021-12-14 17:03:58,260 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 295 transitions. Word has length 102 [2021-12-14 17:03:58,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:58,260 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 295 transitions. [2021-12-14 17:03:58,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 3.129032258064516) internal successors, (97), 27 states have internal predecessors, (97), 15 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (20), 11 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-14 17:03:58,261 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 295 transitions. [2021-12-14 17:03:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 17:03:58,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:58,262 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:58,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:58,484 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,SelfDestructingSolverStorable17 [2021-12-14 17:03:58,484 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:58,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1868628179, now seen corresponding path program 1 times [2021-12-14 17:03:58,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:58,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435804336] [2021-12-14 17:03:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:58,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:59,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:59,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:59,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:59,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:59,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:59,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:03:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:59,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:03:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:59,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:03:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:59,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:03:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:59,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:03:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-14 17:03:59,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:59,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435804336] [2021-12-14 17:03:59,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435804336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:59,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:03:59,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-14 17:03:59,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168633016] [2021-12-14 17:03:59,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:59,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 17:03:59,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:59,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 17:03:59,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-12-14 17:03:59,452 INFO L87 Difference]: Start difference. First operand 239 states and 295 transitions. Second operand has 21 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 6 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:04:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:00,672 INFO L93 Difference]: Finished difference Result 382 states and 470 transitions. [2021-12-14 17:04:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 17:04:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 6 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 102 [2021-12-14 17:04:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:00,674 INFO L225 Difference]: With dead ends: 382 [2021-12-14 17:04:00,674 INFO L226 Difference]: Without dead ends: 269 [2021-12-14 17:04:00,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 17:04:00,675 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 164 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:00,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1146 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 17:04:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-14 17:04:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 243. [2021-12-14 17:04:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 172 states have (on average 1.1337209302325582) internal successors, (195), 179 states have internal predecessors, (195), 46 states have call successors, (46), 19 states have call predecessors, (46), 24 states have return successors, (59), 44 states have call predecessors, (59), 45 states have call successors, (59) [2021-12-14 17:04:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 300 transitions. [2021-12-14 17:04:00,685 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 300 transitions. Word has length 102 [2021-12-14 17:04:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:00,685 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 300 transitions. [2021-12-14 17:04:00,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 6 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:04:00,685 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 300 transitions. [2021-12-14 17:04:00,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 17:04:00,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:00,686 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:00,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 17:04:00,687 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:00,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1610462741, now seen corresponding path program 1 times [2021-12-14 17:04:00,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:00,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077080343] [2021-12-14 17:04:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:00,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:00,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:00,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:00,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:00,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:00,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:00,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:04:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:00,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:04:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:00,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:04:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:00,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:04:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:00,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:04:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-14 17:04:00,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:00,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077080343] [2021-12-14 17:04:00,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077080343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:00,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:00,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:04:00,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750879560] [2021-12-14 17:04:00,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:00,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:04:00,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:04:00,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:04:00,865 INFO L87 Difference]: Start difference. First operand 243 states and 300 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:04:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:01,078 INFO L93 Difference]: Finished difference Result 358 states and 439 transitions. [2021-12-14 17:04:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:04:01,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 102 [2021-12-14 17:04:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:01,079 INFO L225 Difference]: With dead ends: 358 [2021-12-14 17:04:01,079 INFO L226 Difference]: Without dead ends: 241 [2021-12-14 17:04:01,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:04:01,080 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 68 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:01,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 341 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:04:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-14 17:04:01,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-12-14 17:04:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 177 states have internal predecessors, (191), 46 states have call successors, (46), 19 states have call predecessors, (46), 24 states have return successors, (59), 44 states have call predecessors, (59), 45 states have call successors, (59) [2021-12-14 17:04:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 296 transitions. [2021-12-14 17:04:01,090 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 296 transitions. Word has length 102 [2021-12-14 17:04:01,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:01,090 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 296 transitions. [2021-12-14 17:04:01,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:04:01,091 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 296 transitions. [2021-12-14 17:04:01,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-14 17:04:01,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:01,092 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:01,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 17:04:01,092 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:01,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:01,092 INFO L85 PathProgramCache]: Analyzing trace with hash -63505454, now seen corresponding path program 1 times [2021-12-14 17:04:01,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:01,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627650047] [2021-12-14 17:04:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:01,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:04:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:04:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:04:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:04:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:04:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-14 17:04:01,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:01,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627650047] [2021-12-14 17:04:01,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627650047] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:01,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79100222] [2021-12-14 17:04:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:01,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:01,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:01,426 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) [2021-12-14 17:04:01,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 17:04:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:01,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 2682 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 17:04:01,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:01,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:04:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 17:04:02,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:02,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79100222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:02,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:02,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 18 [2021-12-14 17:04:02,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667743926] [2021-12-14 17:04:02,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:02,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 17:04:02,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:02,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 17:04:02,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:04:02,174 INFO L87 Difference]: Start difference. First operand 241 states and 296 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 10 states have internal predecessors, (63), 5 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-14 17:04:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:02,307 INFO L93 Difference]: Finished difference Result 407 states and 491 transitions. [2021-12-14 17:04:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 17:04:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 10 states have internal predecessors, (63), 5 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 104 [2021-12-14 17:04:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:02,309 INFO L225 Difference]: With dead ends: 407 [2021-12-14 17:04:02,309 INFO L226 Difference]: Without dead ends: 248 [2021-12-14 17:04:02,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:04:02,310 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 72 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:02,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 751 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 87 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-12-14 17:04:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-14 17:04:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2021-12-14 17:04:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 173 states have (on average 1.1213872832369942) internal successors, (194), 179 states have internal predecessors, (194), 46 states have call successors, (46), 20 states have call predecessors, (46), 24 states have return successors, (58), 44 states have call predecessors, (58), 45 states have call successors, (58) [2021-12-14 17:04:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 298 transitions. [2021-12-14 17:04:02,321 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 298 transitions. Word has length 104 [2021-12-14 17:04:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:02,321 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 298 transitions. [2021-12-14 17:04:02,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 10 states have internal predecessors, (63), 5 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-14 17:04:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 298 transitions. [2021-12-14 17:04:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-14 17:04:02,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:02,322 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:02,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:02,543 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,SelfDestructingSolverStorable20 [2021-12-14 17:04:02,543 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:02,544 INFO L85 PathProgramCache]: Analyzing trace with hash -335461550, now seen corresponding path program 1 times [2021-12-14 17:04:02,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:02,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095104127] [2021-12-14 17:04:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:02,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:02,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:02,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:02,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:02,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:02,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:02,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:04:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:02,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:04:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:02,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:04:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:02,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:04:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:02,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:04:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-14 17:04:02,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:02,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095104127] [2021-12-14 17:04:02,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095104127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:02,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:02,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 17:04:02,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612846347] [2021-12-14 17:04:02,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:02,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 17:04:02,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:02,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 17:04:02,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:04:02,726 INFO L87 Difference]: Start difference. First operand 244 states and 298 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:04:03,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:03,120 INFO L93 Difference]: Finished difference Result 258 states and 313 transitions. [2021-12-14 17:04:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 17:04:03,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 104 [2021-12-14 17:04:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:03,121 INFO L225 Difference]: With dead ends: 258 [2021-12-14 17:04:03,121 INFO L226 Difference]: Without dead ends: 256 [2021-12-14 17:04:03,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:04:03,122 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 81 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:03,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 895 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 17:04:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-14 17:04:03,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2021-12-14 17:04:03,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 181 states have (on average 1.1160220994475138) internal successors, (202), 188 states have internal predecessors, (202), 47 states have call successors, (47), 21 states have call predecessors, (47), 26 states have return successors, (61), 45 states have call predecessors, (61), 46 states have call successors, (61) [2021-12-14 17:04:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 310 transitions. [2021-12-14 17:04:03,133 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 310 transitions. Word has length 104 [2021-12-14 17:04:03,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:03,133 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 310 transitions. [2021-12-14 17:04:03,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:04:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 310 transitions. [2021-12-14 17:04:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-14 17:04:03,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:03,135 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:03,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 17:04:03,135 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:03,135 INFO L85 PathProgramCache]: Analyzing trace with hash 365603028, now seen corresponding path program 1 times [2021-12-14 17:04:03,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:03,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629910202] [2021-12-14 17:04:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:03,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:03,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:03,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:03,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:03,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:03,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:03,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:04:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:03,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:04:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:03,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:04:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:03,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:04:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:03,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:04:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-14 17:04:03,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:03,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629910202] [2021-12-14 17:04:03,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629910202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:03,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:03,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 17:04:03,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836355894] [2021-12-14 17:04:03,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:03,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 17:04:03,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:03,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 17:04:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:04:03,361 INFO L87 Difference]: Start difference. First operand 255 states and 310 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:04:03,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:03,905 INFO L93 Difference]: Finished difference Result 262 states and 316 transitions. [2021-12-14 17:04:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 17:04:03,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 104 [2021-12-14 17:04:03,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:03,907 INFO L225 Difference]: With dead ends: 262 [2021-12-14 17:04:03,907 INFO L226 Difference]: Without dead ends: 260 [2021-12-14 17:04:03,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-12-14 17:04:03,908 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 92 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:03,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1131 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 17:04:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-14 17:04:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 248. [2021-12-14 17:04:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 176 states have (on average 1.1193181818181819) internal successors, (197), 182 states have internal predecessors, (197), 46 states have call successors, (46), 21 states have call predecessors, (46), 25 states have return successors, (58), 44 states have call predecessors, (58), 45 states have call successors, (58) [2021-12-14 17:04:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 301 transitions. [2021-12-14 17:04:03,922 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 301 transitions. Word has length 104 [2021-12-14 17:04:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:03,923 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 301 transitions. [2021-12-14 17:04:03,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:04:03,923 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 301 transitions. [2021-12-14 17:04:03,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-14 17:04:03,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:03,924 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:03,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 17:04:03,925 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:03,925 INFO L85 PathProgramCache]: Analyzing trace with hash 116279649, now seen corresponding path program 1 times [2021-12-14 17:04:03,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:03,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564697676] [2021-12-14 17:04:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:03,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:04:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:04:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:04:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:04:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 17:04:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-14 17:04:04,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564697676] [2021-12-14 17:04:04,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564697676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212861523] [2021-12-14 17:04:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:04,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:04,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:04,444 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) [2021-12-14 17:04:04,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 17:04:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:04,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 2691 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-14 17:04:04,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:04,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:04:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:04:05,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:04:05,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-14 17:04:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-14 17:04:05,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212861523] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:04:05,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:04:05,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 13] total 29 [2021-12-14 17:04:05,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290903308] [2021-12-14 17:04:05,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:04:05,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-14 17:04:05,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-14 17:04:05,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-12-14 17:04:05,666 INFO L87 Difference]: Start difference. First operand 248 states and 301 transitions. Second operand has 29 states, 27 states have (on average 4.814814814814815) internal successors, (130), 22 states have internal predecessors, (130), 12 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-14 17:04:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:06,773 INFO L93 Difference]: Finished difference Result 450 states and 538 transitions. [2021-12-14 17:04:06,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 17:04:06,774 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 4.814814814814815) internal successors, (130), 22 states have internal predecessors, (130), 12 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) Word has length 110 [2021-12-14 17:04:06,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:06,775 INFO L225 Difference]: With dead ends: 450 [2021-12-14 17:04:06,775 INFO L226 Difference]: Without dead ends: 281 [2021-12-14 17:04:06,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2021-12-14 17:04:06,777 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 331 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:06,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 1177 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1777 Invalid, 0 Unknown, 243 Unchecked, 0.9s Time] [2021-12-14 17:04:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-14 17:04:06,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 262. [2021-12-14 17:04:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 189 states have (on average 1.1164021164021165) internal successors, (211), 196 states have internal predecessors, (211), 46 states have call successors, (46), 21 states have call predecessors, (46), 26 states have return successors, (56), 44 states have call predecessors, (56), 45 states have call successors, (56) [2021-12-14 17:04:06,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 313 transitions. [2021-12-14 17:04:06,791 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 313 transitions. Word has length 110 [2021-12-14 17:04:06,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:06,792 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 313 transitions. [2021-12-14 17:04:06,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 4.814814814814815) internal successors, (130), 22 states have internal predecessors, (130), 12 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-14 17:04:06,792 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 313 transitions. [2021-12-14 17:04:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-14 17:04:06,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:06,794 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:06,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:06,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:06,995 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:06,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:06,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1502069968, now seen corresponding path program 1 times [2021-12-14 17:04:06,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:06,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99008455] [2021-12-14 17:04:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:06,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:04:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:04:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:04:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 17:04:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:04:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:04:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 16 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 17:04:07,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:07,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99008455] [2021-12-14 17:04:07,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99008455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:07,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176740993] [2021-12-14 17:04:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:07,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:07,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:07,682 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) [2021-12-14 17:04:07,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 17:04:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:08,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 2700 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-14 17:04:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:08,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:04:14,406 INFO L354 Elim1Store]: treesize reduction 50, result has 35.9 percent of original size [2021-12-14 17:04:14,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 49 [2021-12-14 17:04:20,855 INFO L354 Elim1Store]: treesize reduction 50, result has 35.9 percent of original size [2021-12-14 17:04:20,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 49 [2021-12-14 17:04:20,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:04:20,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:04:20,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30